b2KIT

All 2769 Free Tools

Every tool runs in your browser. No uploads, no signups, no tracking (unless you consent).

Text & Writing (52)

Word & Character Counter

Count words, characters, sentences, and paragraphs in any text instantly.

Text Case Converter

Convert text between uppercase, lowercase, title case, sentence case, and more.

Text to Speech Player

Paste text and hear it read aloud using Web Speech API. Adjust voice, speed, and pitch in real time.

Text Diff Comparison Tool

Compare two blocks of text side-by-side and highlight differences instantly.

Remove Duplicate Lines

Paste text and instantly remove duplicate lines while preserving order.

Text Cleaner

Strip extra whitespace, fix line breaks, and normalize text for clean output.

Find & Replace in Text

Search and replace text with support for regex, case-sensitive, and whole-word matching.

Speech to Text Transcriber

Record audio via your microphone and transcribe speech to text in real time using Web Speech Recognition.

Sort Lines Tool

Sort lines alphabetically, numerically, by length, or in reverse order.

Add Line Numbers to Text

Prepend line numbers to each line of text with customizable formatting.

Whitespace Visualizer

Reveal hidden spaces, tabs, newlines, and zero-width characters in text.

Word Frequency Counter

Analyze text to find the most frequently used words and their counts.

Text Column Formatter

Paste text and format it into newspaper-style columns (2, 3, or 4 columns). Live CSS preview and download as image.

Invisible Character Detector & Remover

Find and remove zero-width spaces, BOM markers, and other hidden Unicode characters.

Text to Slug / URL Converter

Convert any text into a clean, URL-friendly slug with customizable separators.

Unicode Character Map

Interactive browsable Unicode table with arrows, math symbols, currency, Greek letters, and box drawing blocks. Click to copy any character.

Text to Handwriting Image

Type text and render it in a handwriting-style font on lined paper canvas. Download as a PNG image.

Markdown Table Generator

Visual WYSIWYG table builder - click to add rows and columns, edit cells inline. Generates markdown table syntax.

Text Diff & 3-Way Merger

Three-way merge tool: paste base text, version A, and version B. Highlights conflicts and lets you click to resolve.

Writing Prompt Spinner

Spin-the-wheel UI to generate random creative writing prompts with genre, setting, and character dials.

Text Overlay Preview

Preview text overlaid on images with adjustable font, size, color, and position.

Lorem Ipsum Generator

Generate placeholder text in paragraphs, sentences, or words with variants like Hipster, Corporate, and classic Lorem Ipsum.

Random Text / Dummy Text Generator

Generate random readable text for mockups and wireframes with adjustable length and paragraph structure.

Fancy Text Generator

Convert plain text into decorative Unicode fonts like bold, italic, cursive, strikethrough, and bubble text.

Text Repeater

Repeat any text or emoji a specified number of times with optional separator and line break options.

Reverse Text Generator

Reverse text character-by-character, word-by-word, or flip text upside-down using Unicode transforms.

Text to ASCII Art Generator

Convert text into large ASCII art banners using various font styles rendered in monospace characters.

Online Notepad

Distraction-free text editor with auto-save, word count, dark mode, and markdown formatting support.

Rich Text Editor

WYSIWYG text editor with bold, italic, lists, headings, links, and export to HTML or plain text.

Character Counter

Count characters with and without spaces, words, sentences, and lines with real-time social media limit indicators.

Line Counter

Count total lines, blank lines, and non-blank lines in pasted text or code with line length statistics.

Paragraph Counter

Count paragraphs, average paragraph length, and reading time with a paragraph-by-paragraph breakdown.

Sentence Counter

Count sentences, average sentence length, and identify longest and shortest sentences in your text.

Emoji Keyboard

Full emoji keyboard with categories, skin tones, recent history, and one-click copy organized by Unicode groups.

Kaomoji / Text Emoticon Library

Browse and copy hundreds of kaomoji text emoticons organized by mood with search and favorites.

Special Characters Reference

Browse and copy special characters, symbols, arrows, math operators, and currency signs organized by category.

Word Counter

Count words, characters, sentences, paragraphs, and reading time with keyword density analysis.

Page Title Length Checker

Check page title length against Google's display limits with character and pixel width measurement.

URL Slug Generator

Convert titles and text into SEO-friendly URL slugs with special character handling and transliteration.

Content Brief Generator

Create structured content briefs with target keywords, word count, headings outline, and competitor analysis.

Article Outline Generator

Build hierarchical article outlines with H2/H3 heading structure, talking points, and word count targets.

Keyword Extractor

Extract significant keywords and phrases from text content using TF-IDF and statistical analysis algorithms.

N-Gram Analyzer

Analyze text for unigrams, bigrams, trigrams, and n-gram frequency distributions with visualization.

Stop Words Remover

Remove common stop words from text content for keyword analysis with multi-language support.

Text Statistics Tool

Analyze text with comprehensive statistics including words, syllables, sentences, vocabulary richness, and grade level.

Page Word Count Tool

Analyze HTML content for visible word count, excluding navigation, headers, and footer content regions.

Text Readability Optimizer

Highlight complex sentences, passive voice, and hard-to-read passages with readability improvement suggestions.

Content Gap Analyzer

Compare two text contents to identify topics, keywords, and themes present in one but missing from the other.

Sentence Structure Analyzer

Analyze sentence structures for variety, length distribution, and beginning word patterns in written content.

Text to URL Slug Converter

Convert any text to a URL-safe slug with Unicode transliteration, stop word removal, and separator options.

Advanced Text Line Sorter

Sort text lines alphabetically, numerically, by length, or by custom column with reverse and case-sensitive options.

Paragraph Numbering Tool

Add sequential numbers, bullets, or custom prefixes to paragraphs and text blocks with formatting controls.

Developer & Code (403)

JSON Formatter & Validator

Format, validate, and beautify JSON with syntax highlighting and error detection.

Base64 Encoder / Decoder

Encode text or files to Base64 and decode Base64 strings back to their original form.

SQL Formatter & Beautifier

Format and indent SQL queries for better readability across all major dialects.

HTML to Markdown Converter

Convert HTML markup into clean Markdown syntax with support for tables and lists.

Markdown to HTML Live Preview

Write Markdown and see the rendered HTML output in real time with live preview.

Diff / Patch Viewer

Visualize unified diffs and patch files with color-coded additions and deletions.

Regex Tester & Debugger

Test regular expressions against sample text with real-time match highlighting.

URL Encoder / Decoder

Encode special characters for URLs or decode percent-encoded URL strings.

HTML Entity Encoder / Decoder

Convert special characters to HTML entities and decode entities back to characters.

CSS Minifier / Beautifier

Minify CSS for production or beautify compressed CSS for readability.

JavaScript Minifier / Beautifier

Minify JavaScript to reduce file size or beautify minified code for debugging.

JWT Decoder

Decode and inspect JSON Web Tokens to view header, payload, and signature claims.

API Request Builder

Build HTTP requests visually with method, headers, body, and params. Send via fetch and see the full response. Like a mini Postman.

UUID / GUID Generator

Generate unique UUIDs (v4) and GUIDs individually or in bulk with one click.

WebSocket Tester

Connect to a WebSocket endpoint, send and receive messages, and see a live message log with timestamps.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or file input.

JSON Structure Visualizer

Visualize JSON data as an interactive collapsible tree with type annotations.

CSS Flexbox Playground

Experiment with Flexbox properties visually and copy the generated CSS code.

CSS Grid Layout Generator

Design CSS Grid layouts visually with drag-and-drop and export clean CSS code.

Code Screenshot Generator

Create beautiful code screenshots with syntax highlighting, themes, and padding.

SVG Code Editor & Live Preview

Edit SVG markup with live rendering, syntax highlighting, and instant preview.

CSS Transition Builder

Design CSS transitions with visual easing curve editor and live preview on hover/click states.

Cubic Bezier Easing Editor

Drag control points to create custom cubic-bezier timing functions with comparison to standard easing presets.

CSS Transform Visualizer

Experiment with translate, rotate, scale, skew, and perspective transforms on elements with live CSS output.

Tailwind Color Shade Generator

Input a brand color and auto-generate a full 50-950 Tailwind CSS color palette with dark mode support.

Spacing Scale Generator

Generate a consistent spacing scale (4px, 8px, 12px...) using a base unit and ratio for design systems.

Design Token Generator

Create and export design tokens for colors, spacing, typography, and shadows in JSON, CSS, or SCSS format.

Responsive Breakpoint Visualizer

Define custom breakpoints and see how a layout grid changes across screen widths with live resize handles.

App Icon Generator

Upload an image and generate app icons in all required sizes for iOS, Android, and web with rounded corners.

SVG Sprite Builder

Combine multiple SVG icons into a single sprite file with symbol IDs for efficient web usage.

SVG Optimizer (SVGO)

Paste or upload SVG code and optimize it by removing metadata, comments, and unnecessary attributes.

SVG to CSS Background Converter

Convert SVG graphics to CSS background-image data URIs with proper encoding and minification.

UI Component Library Preview

Browse and customize common UI components (buttons, cards, modals, navbars) with live code preview.

CSS Button Generator

Design buttons visually with gradients, borders, shadows, hover states and copy the complete CSS.

CSS Loading Spinner Generator

Create animated loading spinners and progress indicators with pure CSS and customizable speed/color.

CSS Tooltip Generator

Design and generate pure CSS tooltips with arrow positioning, animations, and responsive behavior.

HTML/CSS Table Style Generator

Design styled HTML tables with striped rows, hover effects, responsive behavior, and export the code.

Progress Bar CSS Generator

Design animated progress bars with gradients, stripes, labels, and responsive width using pure CSS.

Vertical Rhythm Calculator

Calculate line-heights and margins to maintain consistent vertical rhythm across all text elements.

Font Fallback Tester

Test font stacks and see exactly which fallback font renders for each character in your text.

CSS Grid Template Areas Editor

Visually define grid-template-areas by painting named regions on a grid and export clean CSS.

Responsive Layout Tester

Preview HTML layouts at multiple viewport widths simultaneously with device frame overlays.

CSS Shape Generator

Create triangles, circles, hearts, stars, and other shapes using pure CSS with visual controls.

Scroll Animation Builder

Design scroll-triggered CSS animations with visual keyframe editor and IntersectionObserver code output.

CSS Scrollbar Generator

Design custom scrollbar styles with webkit and standard CSS scrollbar properties with live preview.

Database Schema Designer

Design database schemas visually with tables, columns, types, indexes, and relationship lines.

Visual Sitemap Builder

Design website sitemaps as visual tree diagrams with page types, URL slugs, and hierarchy levels.

Glassmorphism Card Generator

Design frosted-glass cards with customizable backdrop-filter, border, gradient, and shadow properties.

CSS Morphing Shape Animator

Create smooth shape-morphing animations between two SVG/CSS shapes with keyframe timeline controls.

Icon Font Generator

Upload SVG icons and generate a custom icon font with CSS class mappings and specimen page.

Emoji Favicon Generator

Generate favicons from emojis or single characters with background color and padding options.

Pricing Table Generator

Design responsive pricing tables with plan tiers, feature lists, and highlighted recommended options.

CSS Custom Properties Generator

Define design tokens as CSS custom properties with dark mode variants and usage snippets.

Tailwind CSS Config Generator

Visually configure Tailwind CSS theme extensions for colors, spacing, and breakpoints with config output.

CSS Multi-Column Layout Generator

Configure CSS multi-column layouts with column count, gap, rule, and span properties with live preview.

Animated SVG Generator

Create SVG animations with path drawing, morphing, and transform keyframes using SMIL or CSS.

Lottie Animation Previewer

Upload and preview Lottie JSON animations with playback controls, speed adjustment, and frame inspection.

CSS Text Underline Decorator

Design custom text underlines using text-decoration, border-bottom, and background-image techniques.

CSS Background Pattern Generator

Create pure CSS background patterns (checkerboard, stripes, polka dots, zigzag) without images.

CSS Gradient Animator

Create animated gradients that shift and flow with customizable speed, angle, and color stops.

Favicon Preview Tool

Preview how your favicon looks in browser tabs, bookmarks bar, and desktop shortcuts across browsers.

CSS Aspect Ratio Box Generator

Generate responsive aspect ratio containers using the aspect-ratio property or padding hack technique.

CSS Form Input Style Generator

Design styled form inputs, checkboxes, radio buttons, and selects with consistent cross-browser CSS.

CSS Card Design Generator

Design content cards with image, title, description, and CTA with hover effects and responsive CSS.

CSS Navigation Bar Generator

Build responsive navigation bars with dropdowns, hamburger menus, and sticky behavior plus code export.

CSS Footer Generator

Design responsive website footers with columns, social links, copyright, and newsletter signup styles.

CSS Hero Section Builder

Design hero sections with background images/video, overlay gradients, CTAs, and responsive text layout.

Page Layout Generator

Generate common page layouts (sidebar + content, 3-column, masonry) with CSS Grid or Flexbox code.

CSS Parallax Scroll Generator

Create parallax scrolling sections with configurable depth layers and pure CSS perspective transforms.

Responsive Image Map Generator

Create clickable image maps with hotspot areas that scale responsively across screen sizes.

CSS Sprite Animation Tool

Create frame-by-frame animations from sprite sheets using CSS steps() timing function.

CSS Media Query Generator

Build responsive CSS media queries for common devices and custom breakpoints with code snippets.

Responsive Font Size Calculator

Calculate fluid typography using CSS clamp() with min/max size and viewport-based scaling.

CSS Container Query Builder

Experiment with CSS container queries visually with resizable containers and responsive component code.

API Schema Visualizer

Paste OpenAPI/Swagger JSON and visualize endpoints, request/response schemas as interactive diagrams.

CSS Shadow Palette Generator

Generate a consistent shadow elevation system (small, medium, large, xl) for a design system.

Image to Base64 Converter

Encode images to Base64 data URI strings for embedding in HTML/CSS.

Barcode Reader

Scan and decode barcodes from uploaded images or live camera.

App Icon Generator

Generate iOS and Android app icons in all required sizes from a single image.

Image to CSS Gradient

Analyze image colors and generate matching CSS gradient code.

SVG Editor

Edit SVG files visually with path manipulation, colors, transforms, and text editing.

SVG ViewBox Editor

Adjust SVG viewBox, dimensions, and coordinate system with visual preview.

SVG Sprite Generator

Combine multiple SVG icons into a single SVG sprite sheet with symbol references.

Image to Data URL

Convert images to complete data URL format for direct HTML/CSS embedding.

CSS Sprite Generator

Generate CSS sprite sheets from multiple images with automatic CSS coordinate code.

Responsive Image Generator

Generate multiple sized versions of images for responsive srcset attributes.

Image Map Generator

Create clickable HTML image maps with rectangular, circular, and polygon hotspots.

Image Hex Color Mapper

Map every pixel in an image to its nearest named CSS color or hex value.

Lottie Animation Player

Preview and play Lottie JSON animation files with speed and loop controls.

9-Patch Image Generator

Create Android 9-patch images with stretchable regions for button backgrounds.

Email Image Slicer

Slice images into table-cell-friendly pieces for HTML email templates.

Code Screenshot Maker

Create beautiful code screenshots with syntax highlighting and custom themes.

Favicon Set Generator

Generate complete favicon sets (ICO, PNG, SVG, Apple Touch) from a single image.

Screen Resolution Detector

Detect and display your screen resolution, viewport size, pixel ratio, color depth, and device orientation.

Browser Info Detector

Detect browser name, version, OS, user agent, installed plugins, and supported Web APIs in your current browser.

JSON to TypeScript Interface Generator

Paste JSON and auto-generate TypeScript interfaces with nested type inference and optional properties.

Cron Expression Generator

Build and validate cron expressions with a visual editor showing human-readable schedule descriptions.

IP Address Lookup

Display your public and local IP address with geolocation, ISP, and network information.

HTML Table Generator

Build HTML tables visually with cell merging, styling options, and clean code export.

Tailwind CSS Color Picker

Browse and copy Tailwind CSS color classes with visual swatches and HEX/RGB value references.

Bookmarklet Generator

Paste JavaScript code and generate a bookmarklet link to drag to your browser bookmarks bar.

chmod Permission Calculator

Calculate Unix file permissions using checkboxes and see the numeric chmod value with command preview.

JSON Path Finder

Paste JSON and click any value to get its JSONPath or dot-notation path for use in code or queries.

CSS Unit Converter

Convert between px, em, rem, vw, vh, pt, cm, mm, and inch CSS units with a configurable root font size.

SQL to MongoDB Query Converter

Convert SQL SELECT queries to equivalent MongoDB find() syntax with projection and sort support.

XML Formatter & Validator

Format, validate, and beautify XML with syntax highlighting, indentation control, and error detection.

URL Parser / Decomposer

Break down any URL into its components: protocol, host, path, query parameters, hash, and port.

User Agent Parser

Paste a user agent string and extract browser, OS, device type, and rendering engine details.

JSON Schema Generator

Paste JSON and auto-generate a JSON Schema with type inference, required fields, and validation rules.

JSON to Go Struct Generator

Generate Go struct definitions from JSON data with proper field naming and JSON tags.

Subnet Calculator

Calculate IP subnet details including network address, broadcast address, host range, and CIDR notation.

CIDR Calculator

Convert between CIDR notation and subnet masks with network range and host count calculations.

Markdown Cheat Sheet

Interactive Markdown reference with syntax examples, live preview, and one-click copy for common patterns.

Git Command Builder

Build git commands interactively by selecting operations, options, and flags with explanation tooltips.

JavaScript Keycode / Event Tester

Press any key to see its keyCode, key, code, and which values with event properties for development reference.

DNS Record Lookup

Look up DNS records (A, AAAA, CNAME, MX, TXT, NS) for any domain using public DNS-over-HTTPS APIs.

CSS Loader / Spinner Generator

Create animated CSS loading spinners and skeleton loaders with customizable size, color, and speed.

HTML Minifier

Minify HTML by removing comments, whitespace, and optional tags while preserving functionality.

IP Address Converter

Convert IP addresses between decimal, binary, hexadecimal, and integer formats for IPv4 and IPv6.

IPv4 to IPv6 Converter

Convert IPv4 addresses to IPv6 mapped and compatible formats with detailed notation breakdown.

IPv6 Compressor / Expander

Compress IPv6 addresses to short notation and expand abbreviated IPv6 addresses to full 128-bit format.

Network Calculator

Calculate network details including wildcard masks, supernetting, VLSM subnetting, and address allocation planning.

IP Range Calculator

Calculate IP address ranges from start/end addresses or CIDR blocks with overlap detection and merging.

MAC Address Lookup

Look up the manufacturer and organization associated with a MAC address OUI prefix from a local database.

MAC Address Generator

Generate random MAC addresses with configurable vendor OUI prefixes and format options (colon, dash, dot).

Port Number Lookup

Search common network port numbers and their associated services, protocols, and security implications.

.htaccess Generator

Generate Apache .htaccess files with redirects, security headers, caching rules, and access control directives.

Nginx Config Generator

Generate Nginx server block configurations with SSL, security headers, reverse proxy, and caching settings.

CRC32 Calculator

Calculate CRC32 checksums for text and files using standard and Castagnoli polynomial implementations.

JSON Formatter & Validator

Format, validate, and minify JSON data with syntax highlighting, tree view, and error reporting.

XML Formatter & Validator

Format, validate, and minify XML documents with syntax highlighting and schema validation.

YAML to JSON Converter

Convert between YAML and JSON formats with validation, formatting, and error highlighting.

TOML to JSON Converter

Convert between TOML and JSON configuration formats with validation and formatting.

JSONPath Tester

Test JSONPath expressions against JSON data with real-time result highlighting and path builder.

JSON Schema Validator

Validate JSON data against JSON Schema definitions with detailed error reporting and schema generation.

JSON to TypeScript Converter

Generate TypeScript interfaces and types from JSON data with configurable naming and optional/required field detection.

JSON to YAML Converter

Convert JSON data to YAML format with configurable indentation, flow style options, and sorting.

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates with timezone support and relative time display.

Epoch Converter

Convert epoch/Unix timestamps to dates and dates to timestamps with millisecond precision and timezone handling.

Text Diff Checker

Compare two text blocks side-by-side with character-level and line-level diff highlighting.

Cron Expression Parser

Parse cron expressions to show human-readable descriptions and calculate the next N execution times.

What Is My IP Address

Display your current public IPv4 and IPv6 addresses with geolocation, ISP, and browser fingerprint details.

MIME Type Lookup

Look up MIME types by file extension and find file extensions for MIME types with a searchable database.

Hex Editor

View and edit binary files in hexadecimal with ASCII sidebar, search, and byte-level editing capabilities.

JWT Debugger

Debug JSON Web Tokens with live editing of header and payload, automatic re-encoding, and signature verification.

Network Mask Converter

Convert between subnet mask formats: dotted decimal, CIDR notation, wildcard mask, and binary representation.

IP in Subnet Checker

Check if a given IP address belongs to a specific subnet/CIDR range with batch checking support.

VLSM Calculator

Calculate Variable Length Subnet Mask allocations to efficiently divide a network into subnets of different sizes.

Supernet Calculator

Calculate supernets by aggregating multiple contiguous subnets into a single larger network (route summarization).

Bandwidth Calculator

Calculate file transfer times, required bandwidth, and data throughput for various connection speeds.

Content-Type Reference

Browse and search MIME content types with associated file extensions, descriptions, and usage examples.

Webhook Tester

Create temporary webhook endpoints to inspect incoming HTTP requests with full header and body logging.

cURL to Code Converter

Convert cURL commands to equivalent code in Python, JavaScript, Go, PHP, Ruby, and other languages.

JSON to Python Dict

Convert JSON data to Python dictionary literals and dataclass definitions with type annotations.

JSON to Java Class

Generate Java POJO classes from JSON data with Jackson/Gson annotations and builder pattern support.

CSS Minifier

Minify CSS code by removing whitespace, comments, and redundant syntax to reduce file size.

JavaScript Beautifier

Format and beautify minified JavaScript code with configurable indentation and brace style options.

CSS Beautifier

Format and beautify minified CSS code with configurable indentation, brace placement, and property sorting.

HTML Beautifier

Format and indent HTML code with configurable tag indentation, attribute wrapping, and void tag handling.

JWT Expiry Calculator

Calculate JWT expiration timestamps from durations and convert exp/iat/nbf claims to human-readable dates.

Web App Manifest Generator

Generate PWA manifest.json files with app name, icons, theme colors, and display mode configuration.

CIDR Network Visualizer

Visualize CIDR ranges and subnet allocations on an interactive IP address space map with overlap detection.

Wildcard Mask Calculator

Calculate wildcard masks from subnet masks and CIDR notation for Cisco ACL and OSPF configuration.

Test Data Generator

Generate realistic fake data (names, addresses, emails, phones) for testing without using real personal information.

Test Credit Card Generator

Generate valid-format test credit card numbers using the Luhn algorithm for development and testing purposes.

Timestamp Converter

Convert between various timestamp formats including ISO 8601, RFC 2822, Unix, Windows FILETIME, and more.

String Escape / Unescape

Escape and unescape strings for JSON, HTML, XML, JavaScript, CSV, SQL, and regex contexts.

Webhook Signature Calculator

Calculate and verify webhook HMAC signatures for Stripe, GitHub, Shopify, and other popular webhook providers.

AWS Signature V4 Calculator

Calculate AWS Signature Version 4 for API requests with step-by-step signing process visualization.

.env File Validator

Validate .env file syntax, detect duplicate keys, check for exposed secrets, and compare with .env.example.

.gitignore Generator

Generate .gitignore files for your project by selecting from templates for languages, frameworks, and IDEs.

Dockerfile Generator

Generate Dockerfiles from an interactive builder with best practice suggestions for common tech stacks.

Docker Compose Generator

Build docker-compose.yml files interactively with service templates for databases, caches, and web frameworks.

GitHub Actions Generator

Generate GitHub Actions workflow YAML files with pre-built templates for CI/CD, testing, and deployment.

Network Packet Analyzer

Parse and analyze hex dumps of network packets to display Ethernet, IP, TCP/UDP headers and payload data.

Bit Manipulation Calculator

Perform bitwise operations (AND, OR, XOR, NOT, shifts) with visual binary representation and step explanation.

SSH Config Generator

Generate SSH client config files (~/.ssh/config) with host entries, jump proxies, and key specifications.

Authorized Keys Manager

Parse, validate, and manage SSH authorized_keys file entries with command restrictions and options.

Known Hosts Parser

Parse and decode SSH known_hosts file entries to display host, key type, and fingerprint information.

DNS Record Builder

Build and validate DNS records (A, AAAA, CNAME, MX, TXT, SRV, CAA) with syntax checking and TTL guidance.

.well-known URL Reference

Browse the IANA .well-known URI registry with descriptions, RFC references, and implementation guidance.

OAuth Scope Builder

Build OAuth 2.0 scope strings for popular APIs (Google, GitHub, Microsoft, Slack) with permission descriptions.

CSS Specificity Calculator

Calculate and compare CSS selector specificity scores with visual breakdown of ID, class, and element weights.

Responsive Design Checker

Preview website layouts across mobile, tablet, and desktop breakpoints with resizable iframe testing.

HTML Formatter & Beautifier

Format, indent, and beautify HTML code with proper nesting, attribute alignment, and minification options.

CSS Formatter & Beautifier

Format, organize, and beautify CSS code with property sorting, indentation control, and minification.

Resource Timing Analyzer

Visualize resource loading waterfall using the Resource Timing API with DNS, TCP, and download breakdowns.

CSS Text Shadow Generator

Create CSS text shadow effects with visual editor for offset, blur, color, and layered shadow combinations.

CSS Border Radius Generator

Design CSS border-radius values with visual editor for individual corners and complex shape creation.

CSS Flexbox Generator

Build CSS flexbox layouts visually with controls for direction, wrap, justify, align, and item properties.

CSS Grid Generator

Design CSS Grid layouts visually with template columns, rows, gap, and area naming with code export.

CSS Transform Generator

Build CSS transform chains with visual controls for rotate, scale, skew, translate, and perspective.

CSS Media Query Generator

Generate responsive CSS media queries for common breakpoints, devices, and screen orientations.

Tailwind to CSS Converter

Convert Tailwind CSS utility classes to standard CSS properties with proper grouping and formatting.

CSS to Tailwind Converter

Convert standard CSS properties to equivalent Tailwind CSS utility classes with class name output.

SCSS to CSS Compiler

Compile SCSS/Sass code to standard CSS with variable resolution, nesting expansion, and mixin processing.

XPath Tester

Test XPath expressions against XML/HTML documents with node selection, result display, and expression builder.

CSS Selector Tester

Test CSS selectors against HTML markup with matched element highlighting and specificity calculation.

HTML to JSX Converter

Convert HTML markup to JSX/React syntax with className, htmlFor, style object, and self-closing tag conversion.

SVG to CSS Background Converter

Convert SVG code to CSS background-image data URI with URL encoding and optimization.

PX to REM Converter

Convert pixel values to rem units and vice versa with customizable root font size base value.

EM Unit Calculator

Calculate em values relative to parent font size with nested em computation and px conversion.

Viewport Unit Calculator

Calculate and convert vh, vw, vmin, and vmax CSS viewport units based on screen dimensions.

Line Height Calculator

Calculate optimal CSS line-height values based on font size and reading comfort with visual preview.

Browser Support Checker

Check CSS property and JavaScript API browser compatibility with Can I Use data and polyfill suggestions.

Screen Resolution Tester

Display current screen resolution, viewport size, device pixel ratio, and color depth information.

Browser Cookie Viewer

View, search, and analyze browser cookies for the current domain with expiry and attribute details.

Local Storage Viewer

Browse, search, edit, and export localStorage and sessionStorage data with JSON formatting support.

IndexedDB Browser

Browse IndexedDB databases, object stores, and records with search, filtering, and export capabilities.

TypeScript to JSON Schema

Convert TypeScript interfaces and types to JSON Schema definitions with property type mapping.

Code Diff Viewer

Compare two code blocks with syntax-highlighted side-by-side and unified diff views.

HTML Live Preview

Write HTML, CSS, and JavaScript with real-time live preview rendering in an isolated sandbox iframe.

Markdown Live Preview

Write and preview Markdown with syntax highlighting, GitHub Flavored Markdown, and export to HTML.

Email HTML Preview

Preview HTML email templates with inbox rendering simulation for desktop and mobile email clients.

Website Screenshot Tool

Capture screenshots of web pages at different viewport sizes using HTML canvas and iframe rendering.

Page Size Checker

Analyze total page weight, number of requests, and resource breakdown by type (JS, CSS, images, fonts).

Data URI Generator

Convert files to data URIs and data URIs back to files for inline embedding in HTML and CSS.

Website Technology Checker

Detect technologies, frameworks, CMS, analytics, and libraries used on web pages from HTML analysis.

HTML Tag Stripper

Remove specific or all HTML tags from content with options to keep text content and whitespace handling.

CSS Glassmorphism Generator

Design glassmorphism UI effects with backdrop-filter blur, transparency, and border controls with live preview.

CSS Neumorphism Generator

Create soft UI neumorphic designs with shadow controls, border-radius, and background color adjustments.

CSS Button Generator

Design custom CSS buttons with padding, colors, borders, shadows, hover effects, and transition animations.

CSS Triangle Generator

Generate CSS triangles using border tricks with direction, size, and color customization options.

Microdata Markup Generator

Generate Schema.org Microdata HTML markup as an alternative to JSON-LD for inline structured data.

RDFa Markup Generator

Create RDFa structured data attributes for HTML elements as an alternative to JSON-LD and Microdata.

Responsive Image Srcset Generator

Build responsive image srcset and sizes attributes for optimal image delivery across screen sizes.

Picture Element Generator

Generate HTML picture elements with source sets for art direction and format switching across breakpoints.

Manifest.json Validator

Validate PWA manifest.json files for required fields, icon sizes, and Web App Manifest specification compliance.

CSS Autoprefixer

Add vendor prefixes to CSS properties for cross-browser compatibility with configurable browser targets.

JavaScript Formatter & Beautifier

Format and beautify JavaScript code with configurable indentation, semicolons, and bracket style options.

JavaScript Obfuscator

Obfuscate JavaScript code with variable renaming, string encoding, and control flow flattening for protection.

HTML Encoder for Code Display

Encode HTML code for safe display in web pages by escaping angle brackets, quotes, and ampersands.

Meta Refresh Tag Generator

Create HTML meta refresh tags for page redirects and auto-refresh with configurable delay timers.

Link Rel Tag Generator

Generate HTML link rel tags for canonical, alternate, prev/next, preload, and icon references.

Website Carbon Calculator

Estimate the carbon footprint of web pages based on page weight, data transfer, and green hosting indicators.

Fluid Typography Calculator

Calculate CSS clamp() values for fluid responsive typography between minimum and maximum viewport sizes.

Gzip Compression Tester

Check if a website serves gzip or brotli compressed responses with compression ratio and size savings display.

Cache-Control Header Generator

Build Cache-Control HTTP headers with max-age, s-maxage, no-cache, no-store, and immutable directives.

ETag Header Checker

Check and validate ETag response headers for proper caching behavior with weak vs strong ETag analysis.

Unused CSS Finder

Detect unused CSS selectors by comparing stylesheet rules against HTML markup for code cleanup.

Google Fonts Optimizer

Generate optimized Google Fonts embed code with font-display, preconnect, and subset configuration.

Table of Contents Generator

Generate HTML table of contents from heading structure with anchor links, nesting, and numbering options.

Sitemap XML Validator

Validate XML sitemap files against the sitemap protocol schema with error reporting and URL count display.

HTML to Pug Converter

Convert HTML markup to Pug (Jade) template syntax with proper indentation and attribute formatting.

YAML Validator

Validate YAML syntax with detailed error messages, line numbers, and formatted output display.

TOML Validator

Validate TOML configuration file syntax with error reporting and formatted JSON output conversion.

.env File Generator

Create .env environment variable files from templates with secret generation and format validation.

Open Source License Generator

Generate open source license files (MIT, Apache, GPL, BSD) with project name and author customization.

Image Alt Tag Checker

Scan HTML for images and verify alt attribute presence, length, keyword inclusion, and descriptive quality.

OpenSearch Description Generator

Generate OpenSearch XML description files for adding custom search to browser search bars.

GitHub README Generator

Build GitHub README.md files with badges, screenshots, installation steps, and contribution guidelines.

Changelog Generator

Create structured changelog entries following Keep a Changelog format with version, date, and change categories.

Semantic Versioning Calculator

Parse, compare, and increment semantic version numbers with range validation and compatibility checking.

HTTP Request Builder

Build and test HTTP requests with method, headers, body, and authentication options using the Fetch API.

cURL to Fetch Converter

Convert cURL commands to JavaScript Fetch API, Axios, and other HTTP client code formats.

API Response Formatter

Format and prettify API responses in JSON, XML, and HTML with syntax highlighting and collapsible sections.

IP Subnet Calculator

Calculate subnet masks, CIDR notation, network address, broadcast address, and host ranges for IPv4/IPv6.

Crontab Schedule Explainer

Enter cron expressions and see human-readable schedule descriptions with next execution time predictions.

Sitelinks Searchbox Schema Generator

Create WebSite structured data with SearchAction for Google sitelinks search box rich result display.

Website Name Schema Generator

Generate WebSite structured data markup to specify your preferred site name display in Google search results.

Query String Builder

Build URL query strings from key-value pairs with encoding, sorting, and duplicate key handling options.

DNS Propagation Checker

Check DNS record propagation across multiple global nameservers to verify DNS changes have taken effect.

MX Record Checker

Look up and validate MX records for email delivery configuration with priority and mail server details.

TXT Record Lookup

Query DNS TXT records to verify SPF, DKIM, DMARC, and domain verification entries for any domain.

Nameserver Lookup

Identify authoritative nameservers for a domain and check NS record configuration and delegation.

HTML / CSS / JS Playground

Write HTML, CSS, and JavaScript in a split-pane editor with instant live preview and console output.

TypeScript Playground

Write TypeScript with real-time transpilation to JavaScript, type checking, and error highlighting.

Python Playground (WASM)

Run Python code directly in the browser via Pyodide WebAssembly with standard library support.

Lua Playground (WASM)

Execute Lua scripts in the browser using Fengari WebAssembly with an interactive REPL console.

Rust to WASM Playground

Compile and run Rust snippets targeting WebAssembly with instant output and error reporting.

Go Playground (WASM)

Write and run Go code in the browser compiled to WebAssembly with standard output display.

SQL Playground (SQLite WASM)

Run SQL queries against an in-browser SQLite database with table creation, import, and result display.

React Component Playground

Build and preview React components with JSX, hooks, and state in an isolated sandbox environment.

Vue Component Playground

Create and preview Vue 3 single-file components with Composition API support in real time.

Svelte Component Playground

Write and preview Svelte components with reactive declarations, stores, and live rendering.

Web Component Builder

Create native Web Components with Shadow DOM, custom elements, and slots with live preview.

WebGL Shader Playground

Write GLSL vertex and fragment shaders with real-time WebGL rendering and uniform controls.

Canvas API Playground

Experiment with the HTML5 Canvas 2D API by writing draw commands and seeing instant visual output.

WebGPU Compute Playground

Write and run WebGPU compute shaders in WGSL with buffer visualization and timing output.

WAT / WASM Text Format Playground

Write WebAssembly Text Format (WAT), compile to WASM, and execute with interactive I/O.

PHP Playground (WASM)

Run PHP code directly in the browser using php-wasm with standard output and error display.

C / C++ Playground (WASM)

Compile and run C/C++ code in the browser via Emscripten WASM with console output and errors.

Tailwind CSS Playground

Write HTML with Tailwind CSS classes and see styled output instantly with the full utility library.

Sass / SCSS Playground

Write SCSS or Sass and compile to CSS in real time with variable, mixin, and nesting support.

Less CSS Playground

Write Less CSS with variables, mixins, and functions and see compiled CSS output instantly.

Python Formatter (Black / autopep8)

Format Python code using Black or autopep8 style rules with configurable line length and options.

Go Formatter (gofmt)

Format Go source code to canonical gofmt style with proper indentation and spacing.

Rust Formatter (rustfmt)

Format Rust code following rustfmt conventions with configurable edition and style options.

Java Formatter

Format Java source code with configurable brace style, indentation, and import ordering.

YAML Formatter & Validator

Format, validate, and lint YAML files with proper indentation and error highlighting.

TOML Formatter & Validator

Format and validate TOML configuration files with error highlighting and section sorting.

GraphQL Formatter & Validator

Format GraphQL queries, mutations, and schemas with syntax validation and pretty printing.

HTML Formatter & Validator

Format and validate HTML markup with proper indentation, tag matching, and W3C-style checks.

Prettier Playground

Run Prettier in the browser with full config options for JS, TS, CSS, HTML, JSON, and Markdown.

ESLint Playground

Run ESLint rules against JavaScript or TypeScript code with configurable rule sets and auto-fix preview.

Stylelint Playground

Lint CSS, SCSS, and Less with Stylelint rules, auto-fix suggestions, and severity reporting.

PHP Formatter (PSR-12)

Format PHP code following PSR-12 coding style with configurable indentation and brace placement.

C# Formatter

Format C# source code with proper namespace indentation, brace style, and member ordering.

Kotlin Formatter

Format Kotlin code following official Kotlin style guide conventions with ktlint compatibility.

Swift Formatter

Format Swift code following Apple style conventions with configurable indentation and line wrapping.

Protocol Buffers Formatter

Format and validate .proto files with proper indentation, field ordering, and syntax checking.

Terraform / HCL Formatter

Format HashiCorp Configuration Language (HCL) and Terraform files with canonical style.

Dockerfile Linter

Lint Dockerfiles against best practices with Hadolint-style rules, security checks, and fix suggestions.

Nginx Config Formatter

Format and validate Nginx configuration files with proper block indentation and directive sorting.

AST Explorer

Parse JavaScript, TypeScript, or Python into an abstract syntax tree and explore nodes interactively.

Code Complexity Analyzer

Measure cyclomatic complexity, lines of code, and maintainability index for JavaScript and TypeScript.

Dependency Graph Visualizer

Paste a package.json and visualize the dependency tree as an interactive force-directed graph.

Bundle Size Analyzer

Estimate JavaScript bundle sizes with tree-shaking simulation and package size comparison.

Source Map Explorer

Upload a source map file and explore the original source files with size contribution breakdown.

CSS Unused Selector Finder

Paste HTML and CSS to find unused selectors with coverage reporting and removal suggestions.

Import Cost Estimator

Check the size impact of npm package imports with minified and gzipped size estimates.

HTML DOM Tree Viewer

Paste HTML and explore the parsed DOM tree with element attributes, nesting depth, and structure.

CSS Property Reference & Browser Support

Search CSS properties with syntax, values, browser support data, and interactive examples.

JavaScript Event Explorer

Interact with a sandbox element and see every DOM event firing with properties, bubbling, and timing.

Regex Railroad Diagram

Visualize regular expressions as railroad diagrams showing groups, quantifiers, and alternatives.

Git Diff Visualizer

Paste unified diff output and see a color-coded side-by-side or inline diff with line-level statistics.

JSONPath Tester

Test JSONPath expressions against JSON documents with matched value highlighting and result display.

OpenAPI / Swagger Editor

Edit OpenAPI 3.x specs in YAML or JSON with live validation, Swagger UI preview, and endpoint listing.

GraphQL Schema Explorer

Paste a GraphQL schema and explore types, queries, mutations, and subscriptions in an interactive tree.

GraphQL Query Builder

Build GraphQL queries visually by selecting fields from a schema with variable and fragment support.

JSON Schema Editor

Build and edit JSON Schema documents visually with type definitions, validations, and live preview.

Protobuf to JSON Converter

Convert Protocol Buffer definitions to JSON representation and vice versa with field mapping.

gRPC Request Builder

Build gRPC requests visually from .proto definitions with message construction and serialization preview.

OpenAPI Mock Data Generator

Generate realistic mock JSON responses from an OpenAPI spec with faker-powered sample data.

REST API Docs Generator

Generate clean API documentation from OpenAPI specs with endpoint details, schemas, and examples.

cURL to Code Converter

Convert cURL commands to fetch, axios, requests, or other HTTP libraries in 15+ languages.

Webhook Payload Builder

Build webhook JSON payloads for GitHub, Stripe, Slack, and custom services with schema templates.

OAuth 2.0 Flow Visualizer

Step through OAuth 2.0 authorization flows visually with token exchange diagrams and parameter details.

Postman to OpenAPI Converter

Convert Postman collection JSON files to OpenAPI 3.x specification format with full mapping.

API Response Diff Tool

Compare two API responses side by side with structural diff, value changes, and schema drift detection.

Server-Sent Events Tester

Connect to an SSE endpoint and display incoming events in real time with event type filtering.

API Rate Limit Calculator

Calculate optimal API rate limiting with token bucket and sliding window algorithms visualization.

JSON to Rust Struct

Generate Rust struct definitions with serde derives from JSON data with Option types for nullable fields.

JSON to C# Class

Generate C# class definitions from JSON with property attributes, nullable types, and JsonProperty annotations.

JSON to Zod Schema

Generate Zod validation schemas from JSON data with type inference, optional fields, and array support.

YAML to TOML Converter

Convert YAML configuration files to TOML format and vice versa with structure preservation.

JSON to GraphQL Schema

Generate GraphQL type definitions from JSON data with query and mutation scaffolding.

SQL DDL to JSON Schema

Convert SQL CREATE TABLE statements to JSON Schema definitions with type mapping and constraints.

.env to JSON / YAML Converter

Convert .env environment files to JSON, YAML, or Docker Compose env format and vice versa.

Markdown to JSON Converter

Parse Markdown documents into structured JSON with headings, paragraphs, lists, and code blocks.

GraphQL to TypeScript

Generate TypeScript types and interfaces from GraphQL schema definitions and query documents.

SQL DDL to Prisma Schema

Convert SQL CREATE TABLE statements to Prisma schema models with relations and field attributes.

CSV to JSON Schema

Infer JSON Schema from CSV data with column type detection, patterns, and validation rules.

Tailwind Component Generator

Generate common UI components (buttons, cards, navbars, modals) with Tailwind CSS and copy the code.

README.md Generator

Build a professional README.md with sections for description, install, usage, API, and license.

.editorconfig Generator

Build .editorconfig files with per-language settings for indent style, charset, and line endings.

package.json Generator

Build package.json files with scripts, dependencies, metadata, and best-practice defaults.

tsconfig.json Generator

Build TypeScript configuration with interactive compiler options, path aliases, and project references.

ESLint Config Generator

Build ESLint configuration files with rule selection, plugin setup, and environment targeting.

Webpack Config Generator

Build webpack.config.js visually with loaders, plugins, optimization, and dev server settings.

Vite Config Generator

Build vite.config.ts with framework presets, plugin setup, build options, and proxy configuration.

License File Generator

Generate LICENSE files from templates (MIT, Apache 2.0, GPL, BSD) with project and author details.

CONTRIBUTING.md Generator

Build contributing guide documents with sections for setup, coding standards, and PR process.

CI Pipeline Config Generator

Generate CI/CD configs for GitLab CI, CircleCI, Jenkins, and Travis CI with template stages.

Kubernetes YAML Generator

Build Kubernetes manifests for Deployments, Services, ConfigMaps, and Ingress resources visually.

Makefile Generator

Build Makefiles with targets, dependencies, and variables for build automation workflows.

CSS Transition Generator

Configure CSS transitions with property, duration, timing function, and delay with live hover preview.

CSS Backdrop Filter Generator

Design backdrop-filter effects for glass-like UI elements with blur, saturation, and contrast controls.

CSS Mask Image Generator

Create CSS mask effects with gradients, images, and SVG masks with live element preview.

CSS Counter Style Generator

Design custom list markers using @counter-style with symbol, system, and range configuration.

CSS Aspect Ratio Calculator

Calculate and preview CSS aspect-ratio values with common presets and responsive container sizing.

CSS Scroll Snap Builder

Configure CSS scroll snap with snap type, alignment, and padding with scrollable live preview.

CSS Container Query Playground

Experiment with CSS container queries by resizing containers and seeing responsive style changes.

CSS Subgrid Playground

Experiment with CSS subgrid to align nested grid items with parent tracks using visual controls.

CSS Logical Properties Converter

Convert physical CSS properties (margin-left) to logical ones (margin-inline-start) for RTL support.

CSS Outline Generator

Configure outline, outline-offset, and focus-visible styles with accessibility-friendly defaults.

CSS Shape Outside Generator

Create float wrapping shapes with circle, ellipse, polygon, and image-based shape-outside values.

CSS Color Function Converter

Convert between CSS color formats: hex, rgb, hsl, hwb, oklch, oklab, and color() with live swatch.

CSS Nesting Converter

Convert flat CSS to native CSS nesting syntax and vice versa with selector validation.

AES Encryption Playground

Encrypt and decrypt text with AES-GCM, AES-CBC, and other algorithms using the Web Crypto API.

X.509 Certificate Decoder

Decode PEM-encoded X.509 certificates and display subject, issuer, validity, and extensions.

HTML Sanitizer Tester

Test HTML sanitization with DOMPurify and configurable allow lists for tags, attributes, and URLs.

SQL Query Builder

Build SQL SELECT queries visually with table joins, WHERE clauses, GROUP BY, and ORDER BY.

SQL EXPLAIN Visualizer

Paste EXPLAIN output from PostgreSQL or MySQL and see a visual query plan with cost estimates.

MongoDB Query Builder

Build MongoDB find, aggregate, and update queries visually with operator selection and JSON preview.

Redis Command Builder

Build Redis commands visually with data structure selection, arguments, and command documentation.

Database Index Advisor

Analyze SQL queries and suggest optimal database indexes based on WHERE, JOIN, and ORDER BY clauses.

SQL Migration Generator

Generate migration scripts (up/down) for schema changes with ALTER TABLE, ADD COLUMN, and rollback.

Fake Data Generator

Generate realistic fake data (names, emails, addresses, dates) in JSON, CSV, or SQL format.

SQL Dialect Converter

Convert SQL between dialects: PostgreSQL, MySQL, SQLite, SQL Server, and Oracle syntax.

Prisma Schema Editor

Edit Prisma schema files with syntax highlighting, model validation, and relation visualization.

Drizzle Schema Editor

Design Drizzle ORM schemas with table definitions, columns, indexes, and relation setup.

IndexedDB Explorer

Browse, query, and manage IndexedDB databases in your browser with table views and CRUD operations.

Database Connection String Builder

Build connection strings for PostgreSQL, MySQL, MongoDB, Redis, and SQL Server with parameter options.

SQL Table Designer

Design database tables visually with column types, constraints, defaults, and generate CREATE TABLE SQL.

Git Commit Message Generator

Build conventional commit messages with type, scope, description, body, and footer following standards.

Git Branch Name Generator

Generate standardized branch names from issue titles with feature/fix/chore prefixes and slug formatting.

Git Conflict Resolver

Paste git merge conflict markers and resolve conflicts with a side-by-side visual editor.

Git Log Visualizer

Paste git log output and see a visual branch graph with commit history and merge points.

Git Hooks Generator

Generate git hook scripts (pre-commit, pre-push, commit-msg) with lint, test, and format checks.

PR Description Generator

Build pull request descriptions with templates for summary, changes, testing, and screenshots.

Release Notes Generator

Build release notes from commit messages with categorization, contributor listing, and formatting.

Monorepo Structure Visualizer

Paste a monorepo directory tree and visualize workspace packages, dependencies, and shared modules.

Git Alias Builder

Build and manage custom Git aliases with command preview, documentation, and .gitconfig export.

JavaScript Profiler

Profile JavaScript code execution time with function-level timing, call count, and performance flame chart.

Memory Leak Detector

Run JavaScript code and track object allocation, detached DOM nodes, and closure references for leaks.

Console.log Formatter

Build styled console.log statements with CSS formatting, tables, groups, and color-coded output.

Stack Trace Parser

Parse stack traces from JavaScript, Python, Java, and Go with clickable file paths and line highlighting.

Network Throttle Simulator

Simulate network conditions (3G, 4G, slow Wi-Fi) and see how file sizes affect load times.

Error Code Lookup

Search common error codes across platforms (HTTP, errno, Windows, Node.js) with descriptions and fixes.

Performance Observer Playground

Use the Performance Observer API to monitor paint timing, layout shifts, and long tasks in real time.

Crontab Expression Editor

Build and validate cron expressions with a visual editor showing next 10 execution times.

Docker Image Size Analyzer

Paste a Dockerfile and estimate layer sizes with optimization tips for smaller image builds.

Conversion (279)

CSV to JSON Converter

Convert CSV data into structured JSON arrays or objects with automatic type detection.

JSON to CSV Converter

Transform JSON arrays and objects into downloadable CSV spreadsheet format.

YAML to JSON Converter

Convert YAML configuration files to JSON format with validation and formatting.

XML to JSON Converter

Parse XML documents and convert them to equivalent JSON structure with attributes.

TSV to CSV Converter

Convert tab-separated values to comma-separated format with proper escaping.

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal bases.

Roman Numeral Converter

Convert between Roman numerals and Arabic numbers with validation.

Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin with real-time calculation.

Length & Distance Converter

Convert between metric and imperial length units including meters, feet, miles, and more.

Weight & Mass Converter

Convert between kilograms, pounds, ounces, grams, and other weight units.

Area Converter

Convert between square meters, acres, hectares, square feet, and other area units.

Data Storage Converter

Convert between bytes, KB, MB, GB, TB, and PB with binary and decimal options.

Speed Converter

Convert between mph, km/h, knots, m/s, and other speed units instantly.

Pixel to REM/EM Converter

Convert between pixel, rem, and em CSS units with a customizable base font size.

Viewport Width Calculator

Calculate viewport-relative CSS units (vw, vh, vmin, vmax) for responsive layouts.

Font Size Scale Generator

Generate a harmonious typographic scale using modular ratios for consistent design.

Morse Code Translator

Translate text to Morse code and back with audio playback of the signal.

Epoch / Unix Timestamp Converter

Convert between Unix epoch timestamps and human-readable dates across time zones.

Markdown to Plain Text Converter

Strip all Markdown formatting and output clean plain text content.

Image to Base64 Encoder

Convert images to Base64-encoded strings for embedding directly in HTML, CSS, or JSON.

GIF to MP4 Converter

Convert animated GIFs to MP4 video for smaller file sizes.

MP4 to GIF Converter

Convert video clips to animated GIFs with frame rate and size controls.

Animated PNG Maker

Create APNG animations from multiple images with transparency support.

DPI Converter

Change image DPI/PPI resolution for print-ready output without resizing pixels.

Image to ASCII Art

Convert images to ASCII art text representations with character density controls.

Audio Trimmer

Trim and cut audio files with waveform visualization and precise start/end controls.

Audio Joiner

Merge multiple audio files into one with crossfade and gap controls.

Audio Format Converter

Convert audio files between MP3, WAV, OGG, AAC, FLAC, and WebM formats.

MP3 to WAV Converter

Convert MP3 audio files to uncompressed WAV format.

WAV to MP3 Converter

Convert WAV audio files to compressed MP3 format with bitrate options.

OGG to MP3 Converter

Convert OGG Vorbis audio files to widely compatible MP3 format.

M4A to MP3 Converter

Convert Apple M4A/AAC audio files to MP3 format for universal playback.

FLAC to MP3 Converter

Convert lossless FLAC audio to compressed MP3 with adjustable bitrate.

Audio Speed Changer

Speed up or slow down audio playback without changing pitch.

Audio Pitch Changer

Shift audio pitch up or down in semitones without changing speed.

Audio Volume Booster

Increase or normalize audio volume with peak limiting and gain control.

Audio Fade In/Out

Add fade-in and fade-out effects to audio files with adjustable duration.

Audio Reverser

Reverse audio playback direction for creative sound effects.

Audio Noise Remover

Remove background noise from audio recordings using spectral subtraction.

Voice Recorder

Record audio from microphone with waveform display and export to MP3/WAV.

Ringtone Maker

Create custom phone ringtones by trimming audio to 30-second clips in M4R/MP3.

Tone Generator

Generate sine, square, triangle, and sawtooth wave tones at any frequency.

Video to GIF Converter

Convert video files to animated GIFs with frame rate, size, and duration controls.

Video Thumbnail Extractor

Extract still frame thumbnails from video files at any timestamp.

Video Trimmer

Trim and cut video files with preview, setting precise start and end points.

Video Compressor

Compress video files to reduce size while maintaining quality using WebCodecs.

Video to MP3 Converter

Extract audio tracks from video files and save as MP3.

Video Rotator

Rotate videos by 90, 180, or 270 degrees and flip horizontally or vertically.

Video Cropper

Crop video dimensions to remove unwanted areas with aspect ratio presets.

Video Resizer

Resize video resolution to standard dimensions (1080p, 720p, 480p, etc.).

Video Speed Changer

Speed up or slow down video playback with smooth motion interpolation.

Video Muter

Remove audio track from video files to create silent videos.

Video Merger

Merge multiple video clips into a single video with transition options.

Video Frame Extractor

Extract all frames from a video as individual PNG images at configurable intervals.

Video Loop Maker

Create seamlessly looping video clips with customizable loop count.

Video Watermark Adder

Add text or image watermarks to videos with position and opacity controls.

Video Subtitle Burner

Burn SRT subtitle text directly into video frames permanently.

WebM to MP4 Converter

Convert WebM videos to widely compatible MP4 format.

MP4 to WebM Converter

Convert MP4 videos to WebM format for web embedding.

MOV to MP4 Converter

Convert Apple MOV video files to universal MP4 format.

AVI to MP4 Converter

Convert AVI video files to modern MP4 format with H.264 encoding.

MKV to MP4 Converter

Convert MKV video files to universally supported MP4 format.

Webcam Photo Booth

Take photos from webcam with countdown timer, filters, and instant download.

Image Eraser Tool

Erase unwanted objects or areas from photos by painting over them.

Image Clone Stamp

Clone and copy areas of an image to paint over unwanted regions.

Image Straighten Tool

Straighten tilted photos by drawing a reference line along the horizon.

Lens Distortion Correction

Correct barrel and pincushion lens distortion in wide-angle photos.

Photo Date Stamper

Add date and timestamp text to photos from EXIF data or custom input.

Image Padding Adder

Add uniform or custom padding around images with solid or transparent backgrounds.

Image Canvas Extender

Extend image canvas size in any direction with color fill or transparency.

Batch Image Cropper

Apply the same crop dimensions to multiple images simultaneously.

Smart Crop Tool

Automatically detect and crop to the main subject or content area of images.

Long Screenshot Maker

Stitch multiple screenshots vertically into one continuous long image.

Image Downscaler

Reduce image resolution for web use with quality-preserving downscaling algorithms.

Photo Aspect Ratio Fitter

Fit images to target aspect ratios by adding letterbox bars or cropping.

Image to STL Converter

Convert grayscale images to 3D STL heightmap models for 3D printing.

Lossless Image Optimizer

Reduce PNG and GIF file sizes without any visible quality loss.

Batch Image Rotator

Rotate multiple images at once by the same angle for batch processing.

Lottie to GIF Converter

Convert Lottie JSON animations to animated GIF or APNG format.

Animated WebP Maker

Create animated WebP files from multiple images with timing controls.

AI to SVG Converter

Convert Adobe Illustrator AI files to SVG format for web use.

Image to Text OCR

Extract text from images and screenshots using Tesseract.js OCR in the browser.

Video Audio Extractor

Extract audio tracks from video files and save as MP3, WAV, or OGG.

Video Timelapse Maker

Extract frames at intervals from video to create timelapse sequences.

Audio Splitter

Split audio files into multiple segments at specified timestamps or intervals.

Audio Equalizer

Apply equalizer bands to audio files with bass, mid, treble, and custom frequency controls.

Audio Compressor/Limiter

Apply dynamic range compression and peak limiting to audio files.

Audio Reverb Effect

Add reverb and echo effects to audio files with room size and decay controls.

Voice Changer

Change voice pitch and add effects to audio recordings in real-time.

Audio to Text Transcriber

Transcribe speech from audio files to text using browser Speech Recognition API.

Text to Speech Generator

Convert text to speech audio using browser synthesis with voice and speed options.

Audio Loop Maker

Create seamless audio loops with crossfade blending at loop points.

Audio Channel Merger

Merge stereo channels to mono or split mono audio to stereo with panning.

Vinyl Record Effect

Add vinyl crackle, pop, and warmth effects to audio for vintage sound.

Images to Video Converter

Convert a sequence of images into a video file with frame rate controls.

GIF Text Adder

Add animated text captions to GIFs with font, color, and timing controls.

Image Trace to SVG

Auto-trace raster images to vector SVG paths with color and detail controls.

Video to WebP Converter

Convert short video clips to animated WebP for lightweight web animations.

Text to Binary Converter

Convert text to binary representation and decode binary back to readable text instantly.

Text to Hex Converter

Convert text to hexadecimal encoding and decode hex strings back to human-readable text.

Universal Unit Converter

All-in-one converter for length, weight, volume, area, speed, temperature, and time with 500+ units.

Volume / Liquid Converter

Convert between liters, gallons, cups, tablespoons, milliliters, and other volume units instantly.

Time Unit Converter

Convert between seconds, minutes, hours, days, weeks, months, and years with decimal precision.

Cooking Measurement Converter

Convert between cups, tablespoons, teaspoons, ounces, grams, and milliliters for recipe scaling.

Recipe Scaler

Enter recipe ingredients and scale them up or down by serving count with automatic unit conversion.

Shoe Size Converter

Convert shoe sizes between US, UK, EU, and CM sizing for men, women, and children.

Fuel Economy Converter

Convert between MPG, L/100km, and km/L fuel consumption units with trip cost estimation.

JSON to YAML Converter

Convert JSON data to YAML format with proper indentation and comment support.

Number to Words Converter

Convert any number to its written word form in English for checks, invoices, and legal documents.

CSV to HTML Table Converter

Convert CSV data to a styled HTML table with sortable columns and copyable HTML code output.

JSON to XML Converter

Transform JSON objects to well-formed XML with configurable root element and attribute handling.

HTML to Plain Text Converter

Strip all HTML tags and convert to clean plain text while preserving paragraph structure and links.

Energy Unit Converter

Convert between joules, calories, kilocalories, BTU, kWh, and electron volts.

Pressure Unit Converter

Convert between psi, bar, atm, Pascal, mmHg, and Torr pressure units with formula display.

Angle Unit Converter

Convert between degrees, radians, gradians, and turns with visual angle representation.

Binary to Text Converter

Decode binary strings back to readable text with auto-detection of 7-bit and 8-bit encoding.

Octal Converter

Convert between octal, decimal, binary, and hexadecimal number systems with step-by-step explanation.

TOML to JSON Converter

Convert TOML configuration files to JSON format with validation and proper type handling.

CSV to SQL INSERT Generator

Convert CSV data to SQL INSERT statements with configurable table name and column type detection.

Timezone Abbreviation Lookup

Search timezone abbreviations (EST, PST, IST, etc.) to find UTC offset, full name, and current time.

Bulk JSON to CSV Exporter

Convert large JSON arrays to CSV with column selection, nested field flattening, and download.

Base64 Image Encoder

Convert images to Base64 data URIs and decode Base64 strings back to downloadable image files.

Base64 File Encoder

Encode any file to a Base64 string and decode Base64 data back to the original file format.

HTML Entity Encoder / Decoder

Convert special characters to HTML entities and decode HTML entities back to their original characters.

Hex Encoder / Decoder

Convert text to hexadecimal representation and decode hex strings back to readable text or binary data.

Unicode Encoder / Decoder

Convert text to Unicode escape sequences (\uXXXX) and decode Unicode-escaped strings to readable text.

ASCII to Hex Converter

Convert ASCII text to hexadecimal values and hex strings back to ASCII characters with multiple format options.

Binary to Text Converter

Convert binary strings to readable text and encode text to binary representation with configurable bit length.

Data URI Converter

Convert files to data URIs for embedding in HTML/CSS and decode data URIs back to downloadable files.

JSON to CSV Converter

Convert JSON arrays to CSV format and CSV files to JSON with column mapping and data type detection.

HTML to Markdown Converter

Convert HTML markup to clean Markdown syntax and Markdown text to HTML with live preview.

Markdown to HTML Converter

Convert Markdown text to HTML with GFM support, syntax highlighting, and sanitized output preview.

Punycode Converter

Convert internationalized domain names between Unicode and Punycode (ACE) encoding formats.

ROT13 Converter

Apply ROT13 letter substitution cipher to text with support for ROT5 (digits) and ROT47 (ASCII) variants.

Binary Code Translator

Translate text to binary code and binary sequences back to readable text with ASCII/UTF-8 encoding support.

Text to Binary File Converter

Convert hex dumps and binary strings to downloadable binary files and view binary files as hex dumps.

Text Encoding Detector

Detect the character encoding of text or files and convert between UTF-8, ASCII, ISO-8859, and other encodings.

Byte Converter

Convert between bytes, kilobytes, megabytes, gigabytes, and other data size units with binary and decimal modes.

NATO Phonetic Alphabet Converter

Convert text to NATO phonetic alphabet spelling for clear communication of codes and identifiers.

WebP Image Converter

Convert images to and from WebP format for faster page loading with quality and size control.

Plain Text to HTML Converter

Convert plain text to HTML with automatic paragraph wrapping, link detection, and list formatting.

JSON to HTML Table Converter

Convert JSON arrays to formatted HTML tables with sortable columns, styling, and responsive design.

SQL INSERT to CSV Converter

Convert SQL INSERT statements to CSV format for data migration and spreadsheet import workflows.

XLSX Spreadsheet Viewer

Open and view Excel .xlsx files in a browser-based spreadsheet grid with multi-sheet support.

XLSX to CSV Converter

Convert Excel .xlsx worksheets to CSV files with encoding and delimiter options.

XLSX to JSON Converter

Parse Excel spreadsheets and export each sheet as structured JSON arrays or objects.

CSV to XLSX Converter

Convert CSV files to Excel .xlsx format with auto-detected column types and formatting.

JSON to XLSX Converter

Transform JSON arrays into downloadable Excel .xlsx workbooks with auto-column sizing.

Pivot Table Builder

Upload CSV or JSON data and build interactive pivot tables with drag-and-drop row, column, and value fields.

Data Table Editor

Edit tabular data in a full-featured spreadsheet grid with formulas, sorting, filtering, and export.

CSV Column Reorder & Picker

Select, reorder, rename, and remove columns from CSV files before downloading.

CSV Merge & Concatenate Tool

Merge multiple CSV files by appending rows or joining on a shared key column.

CSV Splitter

Split large CSV files into smaller chunks by row count, file size, or column value.

CSV Deduplicator

Find and remove duplicate rows from CSV files based on selected columns.

CSV Row Filter

Filter CSV rows using conditions like equals, contains, greater than, regex, and download matching rows.

CSV Statistics Summary

Compute column-level statistics - mean, median, mode, std dev, min/max, percentiles - from any CSV.

TSV to JSON Converter

Convert tab-separated value files to structured JSON with automatic type inference.

PSV (Pipe-Separated) Converter

Convert between pipe-separated values and CSV, TSV, or JSON formats.

Fixed-Width Text Converter

Parse fixed-width text files by defining column positions and convert to CSV or JSON.

DOCX to Plain Text Converter

Extract plain text content from Microsoft Word .docx files entirely in your browser.

DOCX to HTML Converter

Convert Word .docx documents to clean HTML with styles, images, and tables preserved.

DOCX to Markdown Converter

Convert Word documents to Markdown format preserving headings, lists, tables, and links.

PPTX Slide to Images Extractor

Extract slides from PowerPoint .pptx files as individual PNG images.

Box Plot Builder

Generate box-and-whisker plots showing median, quartiles, and outliers for data sets.

Parallel Coordinates Chart

Plot multi-dimensional data on parallel axes to reveal patterns and clusters.

Chart Screenshot Exporter

Export any built chart as high-resolution PNG or scalable SVG for presentations and reports.

CSV Auto-Chart Wizard

Upload a CSV file and auto-detect the best chart type with one-click customization and export.

Violin Plot Builder

Create violin plots showing data distribution density alongside box plot summary statistics.

Ridgeline / Joy Plot Builder

Create overlapping density plots (ridgeline/joy plots) to compare distributions across groups.

Dot Plot / Strip Chart Builder

Create dot plots and strip charts showing individual data points along a category axis.

Base32 Encoder / Decoder

Encode and decode data using Base32 (RFC 4648) with standard and hex alphabets.

Base58 Encoder / Decoder

Encode and decode data using Base58 (Bitcoin) or Base58Check with checksum validation.

Base85 / Ascii85 Encoder / Decoder

Encode and decode data using Base85 (Ascii85, Z85, or RFC 1924) encoding variants.

Octal Encoder / Decoder

Convert between text, decimal, hex, and octal number representations.

ROT13 / ROTn Cipher Tool

Apply ROT13 or any ROTn (1-25) letter rotation cipher to text for simple obfuscation.

UTF-8 Byte Inspector

View the UTF-8 byte representation of any text with per-character hex breakdown.

UTF-16 Converter

Encode text to UTF-16 (LE/BE) byte sequences and decode UTF-16 buffers back to text.

Character Encoding Converter

Convert files between character encodings: UTF-8, Latin-1, Windows-1252, Shift-JIS, EUC-KR, Big5, and more.

Braille Translator

Convert text to Unicode Braille characters and back with grade 1 and grade 2 support.

Quoted-Printable Encoder / Decoder

Encode and decode email-safe Quoted-Printable (QP) encoded text per RFC 2045.

UUEncode / UUDecode Tool

Encode and decode files using UUEncoding, a legacy binary-to-text encoding for email.

Percent Encoding Tool

Apply full percent-encoding (URI component) to strings with custom reserved character sets.

HTML Entity Lookup & Converter

Search and browse all HTML entities by name, number, or character with copy-to-clipboard.

Binary to Text Converter

Convert between binary (01100001) and text with ASCII and Unicode support.

NATO Phonetic Alphabet Converter

Convert text to NATO phonetic alphabet (Alpha, Bravo, Charlie) and back.

CIDR Subnet Calculator

Calculate subnet masks, network addresses, broadcast, and host ranges from CIDR notation.

MAC Address Formatter

Convert MAC addresses between colon, dash, dot, and bare hex formats with OUI lookup.

UUID Generator & Parser

Generate UUIDs (v1, v4, v5, v7) and parse existing UUIDs to inspect version and timestamp.

ULID Generator & Decoder

Generate Universally Unique Lexicographically Sortable Identifiers and decode timestamps from them.

Snowflake ID Decoder

Decode Snowflake IDs (Twitter, Discord) to extract embedded timestamp, worker, and sequence.

Batch Epoch Timestamp Converter

Convert lists of epoch timestamps (seconds/milliseconds) to human-readable dates and vice versa.

JWT Builder & Signer

Build custom JWT tokens with payload editor and sign with HS256/HS384/HS512 secrets locally.

MessagePack Viewer & Converter

Decode MessagePack binary data to JSON and encode JSON to MessagePack with hex/base64 input.

BSON Viewer & Converter

Inspect BSON (Binary JSON) documents and convert between BSON and JSON formats.

CBOR Viewer & Converter

Decode CBOR (Concise Binary Object Representation) data and convert to/from JSON.

Protocol Buffer Decoder

Decode raw Protocol Buffer binary messages without a .proto schema using wire type analysis.

Avro File Viewer

View Apache Avro container files with embedded schema display and record browsing.

Parquet File Viewer

Open and browse Apache Parquet files in the browser with column statistics and row group info.

Parquet to CSV Converter

Convert Apache Parquet files to CSV format with column selection and row limit options.

Apache Arrow IPC Viewer

View Apache Arrow IPC (Feather) files with schema inspection and tabular data browsing.

NDJSON / JSON Lines Tool

Parse, validate, and convert Newline-Delimited JSON (NDJSON / JSON Lines) to arrays or CSV.

TOML Converter

Convert between TOML, JSON, and YAML configuration formats with validation and formatting.

INI File Converter

Parse INI configuration files and convert to JSON or YAML with section and key mapping.

Property List (plist) Converter

Parse Apple Property List files (XML/binary plist) and convert to JSON or YAML.

JSONPath Query Evaluator

Run JSONPath queries against JSON data with live results and expression builder.

jq Playground

Run jq filter expressions against JSON data in the browser with syntax highlighting.

XPath Query Evaluator

Evaluate XPath expressions against XML documents with node highlighting and result tree.

XML Validator & Formatter

Validate XML documents for well-formedness and format with configurable indentation.

CSV Validator & Linter

Validate CSV files for structural issues: unquoted fields, inconsistent columns, encoding problems.

JSON to Python Dataclass Generator

Generate Python dataclass definitions from JSON samples with typing annotations.

File Signature / Magic Number Detector

Detect file types by reading magic bytes (file signatures) regardless of extension.

Data URI Decoder & Previewer

Paste a data: URI to preview the embedded content and download the original file.

ZIP File Creator

Create ZIP archives from multiple files entirely in the browser with compression level control.

ZIP File Extractor

Extract and browse ZIP archive contents in the browser with selective file download.

TAR Archive Viewer

Browse and extract files from .tar, .tar.gz (tgz), and .tar.bz2 archives in the browser.

Gzip Compress / Decompress

Compress files with gzip and decompress .gz files entirely in the browser.

Compression Benchmark Tool

Compare gzip, brotli, and deflate compression ratios and speed on your data side by side.

File Hex Viewer

View any file as a hex dump with ASCII sidebar, byte highlighting, and offset navigation.

File Diff / Compare Tool

Compare two text files side-by-side or inline with syntax highlighting and diff statistics.

Batch File Hash Calculator

Calculate MD5, SHA-1, SHA-256, SHA-512 hashes for multiple files at once with verification.

File Encoding Detector

Detect the character encoding of text files (UTF-8, Latin-1, Shift-JIS, etc.) with confidence scores.

Line Ending Converter (CRLF/LF/CR)

Convert text file line endings between Windows (CRLF), Unix (LF), and old Mac (CR).

BOM (Byte Order Mark) Tool

Detect, add, or remove UTF-8/UTF-16 BOM from text files to fix encoding issues.

Batch File Renamer

Rename multiple files using patterns: find/replace, numbering, date prefix, regex, and case change.

File Splitter & Joiner

Split large files into smaller parts by size and rejoin them - all in the browser.

EPUB Metadata Viewer

View metadata (title, author, publisher, ISBN, cover) from EPUB e-book files.

ICS Calendar File Viewer

View and parse iCalendar (.ics) files showing events, dates, locations, and recurrence rules.

ICS Calendar Event Creator

Create .ics calendar event files with date, time, recurrence, reminders, and attendees.

SVG to CSS Data URI

Convert SVG files to CSS-embeddable data: URIs and background-image declarations.

Batch Image Format Converter

Convert multiple images between PNG, JPG, WebP, BMP, and AVIF formats at once.

Batch Image Resizer

Resize multiple images at once to specific dimensions, percentages, or max widths/heights.

Image to ASCII Art Converter

Convert images to ASCII art text with adjustable character width and contrast mapping.

Base64 to Image Decoder

Decode base64 encoded image strings to visual preview with format detection and download.

Image Palette Extractor

Extract dominant color palettes from images with hex, RGB, and HSL values and downloadable swatches.

Image Pixel Inspector

Zoom into images at pixel level and click to read exact color values at any coordinate.

Image DPI / PPI Changer

View and change the DPI/PPI metadata of images for print-ready output without resampling.

RGB / HSL / HSV Color Converter

Convert colors between RGB, HSL, HSV, and hex with visual picker and live preview.

CMYK Color Converter

Convert between CMYK (print) and RGB/Hex (screen) color values with visual swatch comparison.

CIE LAB Color Converter

Convert between CIE LAB (perceptual) and RGB/Hex color spaces with Delta E distance.

LCH / OKLCH Color Converter

Convert between LCH, OKLCH, and RGB color spaces used in modern CSS specifications.

CSS Gradient Generator

Design linear, radial, and conic CSS gradients with visual editor and copy-ready CSS code.

All-in-One Color Format Converter

Convert any color between 12+ formats: hex, RGB, HSL, HSV, CMYK, LAB, LCH, OKLCH, HWB.

GeoJSON Viewer & Editor

View GeoJSON features on an interactive map with editing, styling, and property inspection.

KML to GeoJSON Converter

Convert Google Earth KML/KMZ files to GeoJSON format with style and property preservation.

GPX Track Viewer

View GPS tracks, routes, and waypoints from GPX files on an interactive map with elevation profile.

GPX to GeoJSON Converter

Convert GPX track files to GeoJSON format with elevation and timestamp data preserved.

GPS Coordinate Converter

Convert between decimal degrees, DMS, UTM, and MGRS coordinate formats with map preview.

GeoJSON to CSV Converter

Extract features and properties from GeoJSON into a flat CSV table with coordinate columns.

CSV to GeoJSON Converter

Convert CSV files with latitude/longitude columns to GeoJSON point features for mapping.

WKT Geometry Viewer

Parse and visualize Well-Known Text (WKT) geometry strings on an interactive map.

Geohash Encoder / Decoder

Encode coordinates to geohash strings and decode geohashes to bounding boxes on a map.

Geographic Distance Calculator

Calculate great-circle distance between two coordinates using Haversine and Vincenty formulas.

vCard Viewer & Editor

View and edit vCard (.vcf) contact files with photo display and field editing.

vCard Contact Creator

Create vCard (.vcf) contact files with name, phone, email, address, photo, and social links.

CSV to vCard Converter

Convert CSV contact lists to vCard (.vcf) files with column-to-field mapping.

vCard to CSV Converter

Export vCard (.vcf) contacts to a CSV spreadsheet with all fields as columns.

ICS to CSV Event Exporter

Export calendar events from ICS files to CSV spreadsheets with date, time, and location columns.

CSV to ICS Calendar Converter

Convert CSV event lists to ICS calendar files with date, time, location, and description mapping.

Audio Metadata Viewer

View ID3 tags, album art, duration, bitrate, and codec info from MP3, FLAC, WAV, and OGG files.

Audio Waveform Viewer

Visualize audio file waveforms with zoomable timeline, amplitude display, and spectrogram view.

SRT to VTT Subtitle Converter

Convert SRT subtitle files to WebVTT format for HTML5 video with timing preservation.

VTT to SRT Subtitle Converter

Convert WebVTT subtitle files to SRT format for broad media player compatibility.

Subtitle Timing Editor

Edit SRT/VTT subtitle timing, shift all cues, adjust sync offset, and fix overlapping entries.

Font File Inspector

Inspect OTF/TTF/WOFF/WOFF2 font files showing glyph count, supported characters, and metadata tables.

WOFF2 / WOFF / TTF Font Converter

Convert between WOFF2, WOFF, and TTF font formats for web and desktop use.

Font Glyph Viewer

Browse all glyphs in a font file with Unicode code points, glyph names, and search.

Web Font CSS @font-face Generator

Generate @font-face CSS declarations from uploaded font files with format fallbacks.

STL 3D Model Viewer

View and rotate STL 3D model files in the browser with wireframe, solid, and measurement modes.

OBJ 3D Model Viewer

View OBJ 3D model files with MTL materials and texture support in an interactive 3D scene.

glTF / GLB 3D Viewer

View glTF and GLB 3D models with PBR materials, animations, and scene graph inspection.

STL to OBJ Converter

Convert STL 3D models to OBJ format with optional normal recalculation.

Data Sampling Tool

Take random or stratified samples from large CSV/JSON datasets with reproducible seed support.

CSV Transpose Tool

Transpose CSV data - swap rows and columns - with header detection and download.

Data Type Detector & Profiler

Analyze CSV/JSON columns to detect types (int, float, date, email, URL), null rates, and unique counts.

Text Whitespace Cleaner

Remove extra whitespace, tabs, trailing spaces, blank lines, and non-breaking spaces from text.

JSON Flatten / Unflatten Tool

Flatten nested JSON to dot-notation key-value pairs and unflatten back to nested structure.

CSV to Markdown Table Converter

Convert CSV data to Markdown-formatted tables with alignment options and clipboard copy.

Batch QR Code Generator

Generate multiple QR codes at once from a CSV or text list with bulk download as ZIP.

Batch Barcode Generator

Generate multiple barcodes (Code 128, EAN-13, UPC-A, Code 39) from a list with ZIP export.

Color & Design (370)

Color Picker + HEX/RGB/HSL/CMYK

Pick colors visually and convert between HEX, RGB, HSL, and CMYK formats.

Print Color Preview

Preview how screen colors translate to print with CMYK simulation and proofing.

Font Preview Tool

Preview any Google Font at various sizes, weights, and with custom sample text.

CSS Gradient Generator

Create linear, radial, and conic CSS gradients with a visual editor and code output.

Color Palette Generator

Generate harmonious color palettes from a base color using color theory rules.

Color Blindness Simulator

Simulate how colors appear to people with various types of color vision deficiency.

Box Shadow CSS Generator

Design box shadows visually with multiple layers and copy the CSS code.

Border Radius CSS Preview Tool

Adjust border-radius values for each corner visually and copy the CSS output.

Glassmorphism CSS Generator

Create frosted-glass UI effects with adjustable blur, transparency, and border.

Design System Generator

Input brand color and font to auto-generate a complete design system: buttons, cards, forms, and typography scale with live preview.

SVG Path Editor

Visual SVG path editor. Click to place points, drag Bezier curves, and see SVG path code update live.

Pattern / Texture CSS Generator

Generate repeating CSS patterns and textures with customizable colors and scale.

Aspect Ratio Calculator

Calculate and convert aspect ratios for images, videos, and responsive containers.

Placeholder Image Generator

Generate placeholder images of any size with custom colors, text, and formats.

CSS Text Shadow Generator

Design text shadows with multiple layers, blur, and color controls plus CSS output.

CSS Clip-Path Generator

Draw polygon, circle, ellipse, and inset clip-path shapes visually and export the CSS code.

CSS Filter Playground

Stack and adjust CSS filter effects (blur, brightness, contrast, hue-rotate, etc.) with live image preview.

CSS Blend Mode Previewer

Preview all CSS mix-blend-mode and background-blend-mode options on two layered images in real time.

Neumorphism CSS Generator

Design soft-shadow neumorphic UI elements with adjustable depth, blur, color, and shape controls.

Interactive Color Wheel

Click on a color wheel to explore complementary, analogous, triadic, split-complementary, and tetradic harmonies.

Gradient Mesh Generator

Create multi-point mesh gradients with draggable color stops and export as CSS or SVG.

Color Name Finder

Enter any HEX or RGB value and find the closest named CSS color, Pantone, and RAL reference.

Accessible Color Palette Generator

Generate color palettes that meet WCAG AA/AAA contrast requirements with automatic pairing suggestions.

Color Mixer Tool

Mix two or more colors together with adjustable ratios in RGB, HSL, or LAB color space.

Color Temperature Adjuster

Shift any color warmer or cooler along the color temperature spectrum with before/after preview.

SVG Icon Editor

Create and edit simple SVG icons with path tools, fill/stroke controls, and optimized SVG code export.

Device Mockup Frame Generator

Place screenshots inside realistic device frames (iPhone, MacBook, iPad, Android) and export as PNG.

Timeline Creator

Build horizontal or vertical timelines with events, dates, descriptions, and color-coded categories.

Pie Chart Generator

Create pie and donut charts from data with custom colors, labels, legends, and SVG/PNG export.

Bar Chart Generator

Build vertical and horizontal bar charts with grouped/stacked options, axis labels, and export.

Line Chart Generator

Create line and area charts with multiple series, smooth/stepped curves, and interactive tooltips.

Waffle Chart Generator

Create grid-based waffle charts for percentage visualization with icon or square fill options.

Funnel Chart Generator

Build conversion funnel visualizations with stage labels, counts, and drop-off percentages.

Gauge / Meter Chart Generator

Create semicircular gauge charts for KPI dashboards with custom ranges, colors, and needle animation.

ASCII Art Generator

Convert images to ASCII art or create ASCII text art with adjustable character density and width.

Unicode Block Art Editor

Draw art using Unicode block characters and box-drawing characters with copy-to-clipboard output.

Dot Plot Generator

Create dot plots and strip charts for showing distribution of individual data points along an axis.

Box Plot Generator

Create box-and-whisker plots showing median, quartiles, and outliers from raw data input.

Word Cloud Generator

Create visually weighted word clouds from text input with customizable shapes, fonts, and color schemes.

Simple Logo Maker

Create basic logos by combining text, shapes, and icons with layering, color, and export to SVG/PNG.

Monogram Generator

Create stylized monogram designs from initials with font, layout, and frame customization options.

SVG Pattern Background Generator

Generate seamless tiling SVG patterns (stripes, dots, waves, chevrons) with color and scale controls.

Noise & Grain Texture Generator

Generate Perlin noise, simplex noise, and film grain textures as PNG or CSS background overlays.

Wave / Divider SVG Generator

Create decorative wave, curve, and geometric section dividers for web pages with SVG output.

Blob Shape Generator

Generate organic blob shapes with adjustable complexity, size, and randomness as SVG paths.

Geometric Shape Generator

Create regular polygons, stars, spirals, and geometric patterns as SVG with customizable properties.

Image Pixelator

Pixelate images with adjustable block size to create retro pixel-art style effects from photos.

Image to SVG Tracer

Trace raster images (PNG/JPG) to vector SVG paths with adjustable threshold and detail levels.

Color Gradient Mapper

Map a gradient across an image by replacing brightness values with custom gradient colors.

Certificate Maker

Design printable certificates and awards with decorative borders, seals, and customizable text fields.

Badge / Ribbon Maker

Create digital badges, ribbons, and award emblems with customizable text, icons, and color schemes.

Label & Sticker Maker

Design product labels and stickers with custom shapes, text, barcodes, and print-ready PDF export.

Artistic QR Code Generator

Create styled QR codes with embedded logos, custom colors, rounded modules, and gradient fills.

Typography Scale Visualizer

Visualize type scales side-by-side using different ratios (minor third, major third, golden ratio, etc.).

Variable Font Playground

Explore variable font axes (weight, width, slant, optical size) with live sliders and CSS output.

Text Art / FIGlet Generator

Convert text into large ASCII art banners using classic FIGlet fonts with dozens of style options.

CSS Gradient Text Generator

Apply gradient colors to text with background-clip technique and export the CSS snippet.

Image Noise Reduction Tool

Reduce noise and grain from photos using median and Gaussian blur filters with before/after comparison.

Wireflow Builder

Combine wireframe screens with flow arrows to create wireflow diagrams showing UI and navigation together.

Style Tile Generator

Create style tiles with color palettes, typography, UI elements, and texture samples for design proposals.

Color Palette from Image Extractor

Extract a curated palette of 5-10 dominant colors from any uploaded image with export to HEX/RGB/HSL.

Gradient Palette Generator

Generate beautiful multi-stop gradient collections from a base color with CSS code for each gradient.

Isometric Grid Editor

Draw isometric illustrations with snap-to-grid, cube shapes, and axonometric projection tools.

Image Annotation Tool

Add arrows, callouts, numbered markers, text labels, and highlights to screenshots and images.

Family Tree Builder

Build interactive family trees with photos, names, dates, and multi-generational relationship lines.

Color Swatch Card Generator

Generate printable color swatch cards with HEX, RGB, CMYK values for physical reference.

Color Shades & Tints Generator

Generate a full range of shades (darker) and tints (lighter) from any base color with export options.

Pantone Color Finder

Find the closest Pantone color match for any HEX/RGB value with Delta-E accuracy measurement.

Color Space Converter

Convert colors between HEX, RGB, HSL, HSV, CMYK, LAB, and OKLCH color spaces with visual comparison.

CSS Text Effect Generator

Create text effects like neon glow, 3D extrude, emboss, outline, and gradient with live CSS output.

Image Palette Analyzer

Analyze the color distribution of an image with histogram, dominant colors, and palette harmony scoring.

3D Text Generator

Create 3D extruded text effects with perspective, lighting, and shadow using CSS transforms and Canvas.

Image Tiling / Repeat Tool

Preview how an image tiles as a repeating background and adjust seamless tiling with offset controls.

Letter Spacing & Line Height Tool

Fine-tune letter-spacing, word-spacing, and line-height for optimal readability with visual comparison.

Color Blindness Palette Checker

Test entire color palettes against all types of color vision deficiency with side-by-side simulation.

Golden Ratio Layout Tool

Overlay golden ratio, rule of thirds, and phi grid guides on images or blank canvases for composition.

SVG Wave Pattern Generator

Generate smooth, layered wave patterns as SVG with color, amplitude, frequency, and layer controls.

Knitting Pattern Chart Maker

Create knitting charts on a grid with stitch symbols, color work patterns, and printable output.

CSS Conic Gradient Generator

Create conic and repeating conic gradients visually for pie-chart backgrounds and decorative effects.

Sprite Animation Previewer

Upload a sprite sheet and preview the animation with adjustable frame size, speed, and playback controls.

Text on Path SVG Generator

Place text along SVG paths (circles, waves, custom curves) with offset and spacing controls.

Poster Maker

Design printable posters with text, images, shapes, and backgrounds at standard poster dimensions.

Flyer / Leaflet Maker

Design single-page flyers with text columns, images, and contact info at letter or A4 dimensions.

Website Color Palette Extractor

Enter a URL and extract all colors used in the CSS as a organized palette with usage frequency.

Design Handoff Spec Generator

Upload a design screenshot and annotate it with dimensions, spacing, colors, and font specs for developers.

Browser Window Mockup Generator

Wrap screenshots in realistic browser window frames (Chrome, Safari, Firefox) with customizable URL bar.

3D Box/Package Mockup Generator

Create 3D product box mockups with custom face images, perspective, and lighting using CSS transforms.

T-Shirt Mockup Generator

Place designs on t-shirt templates with color, size, and positioning adjustments for preview.

Book Cover Mockup Generator

Create 3D book cover mockups with front, spine, and back covers using perspective CSS transforms.

Screenshot to Mockup

Place screenshots into device mockup frames like phones, tablets, and laptops.

Browser Screenshot Mockup

Wrap screenshots in browser window frames with address bar and controls.

Rounded Corner Maker

Add rounded corners to images with adjustable radius and background color.

Image Comparison Slider

Compare two images side by side with an interactive before/after slider.

Image Channels Splitter

Split images into separate red, green, blue, and alpha channel views.

Image Background Changer

Replace image backgrounds with solid colors, gradients, or custom images.

Gradient Image Generator

Create gradient background images with linear, radial, and conic gradient types.

Pattern Generator

Generate seamless tiling patterns (stripes, dots, chevrons, geometric) as PNG or SVG.

Mesh Gradient Generator

Create modern mesh gradients with multiple color control points for backgrounds.

Audio Visualizer

Generate real-time audio visualizations with waveform, spectrum, and bar displays.

Audio Waveform Generator

Generate static waveform images from audio files for social media and embeds.

Image Drawing Tool

Draw freehand on images with pen, brush, shapes, and eraser tools.

Image Mirror Maker

Create mirror reflection effects by duplicating and flipping image halves.

Emboss Effect Tool

Apply emboss and deboss relief effects to images with directional lighting.

Edge Detection Tool

Apply Sobel, Canny, and Laplacian edge detection filters to images.

Color Balance Adjuster

Adjust color balance between cyan-red, magenta-green, and yellow-blue channels.

CMYK to RGB Converter

Convert CMYK print color values to RGB screen color values and vice versa.

Photo Slideshow Maker

Create slideshows from images with transitions, timing, and music export as video.

Image Palette Swapper

Remap image colors to match a different color palette for style transfer.

Text to Image Generator

Generate stylized text images with custom fonts, colors, shadows, and effects.

Photo Card Maker

Create greeting cards, invitations, and postcards from photos with text and borders.

Color LUT Applier

Apply 3D color lookup tables (LUTs) to images for cinematic color grading.

Image Noise Generator

Add film grain, Gaussian noise, or salt-and-pepper noise to images.

Dominant Color Finder

Find the single most dominant color in an image with percentage breakdown.

Vibrance Adjuster

Boost muted colors in photos without oversaturating already vivid areas.

Image to Emoji Art

Convert images to emoji mosaics using colored emoji characters.

Stipple Art Generator

Convert photos to stipple dot art illustrations using density-based point placement.

Line Art Generator

Convert photos to clean line art drawings with adjustable detail levels.

HEX to RGB / RGBA Converter

Convert HEX color codes to RGB and RGBA values with opacity support and visual preview.

Color Name Lookup

Enter any HEX or RGB value and find the closest named CSS color with a visual swatch comparison.

Color Mixer

Mix two or more colors together to see the resulting blend with adjustable ratios and color space options.

Color Shade & Tint Generator

Generate a full range of shades and tints from any base color with copyable HEX values for each step.

App Icon Maker

Design simple app icons with shapes, text, and colors then export at standard iOS and Android icon sizes.

Color Code Converter

Convert between all color formats: HEX, RGB, RGBA, HSL, HSLA, CMYK, and CSS named colors simultaneously.

CSS Clip Path Maker

Create CSS clip-path shapes visually by dragging points with polygon, circle, and ellipse presets.

HTML Color Names Chart

Browse all 148 named CSS colors with HEX values, color swatches, and search filtering.

Interactive Color Wheel

Visual color wheel for selecting colors and exploring complementary, analogous, triadic, and split relationships.

CSS Filter Generator

Build CSS filter chains with blur, brightness, contrast, grayscale, and hue-rotate with live preview.

Font Icon Search / Browser

Browse and search popular icon sets like Lucide and Material with copy-to-clipboard for SVG or class names.

Placeholder Photo Gallery

Browse and download placeholder photos at custom dimensions for design mockups and wireframes.

SVG Wave / Divider Generator

Generate customizable SVG wave section dividers with amplitude, frequency, and color controls for web design.

Stripe / Line Pattern Generator

Create repeating stripe patterns with adjustable angle, width, spacing, and colors for backgrounds.

Color Picker from Image

Upload an image and click anywhere to pick the exact color value in HEX, RGB, and HSL format.

Font Stack Tester

Preview CSS font-family stacks with fallback chain visualization and system font availability detection.

Web Font Preview Tool

Preview and compare Google Fonts and system fonts with customizable size, weight, line height, and sample text.

CSS Gradient Generator

Create linear, radial, and conic CSS gradients with visual editor, color stops, and angle controls.

Typography Scale Generator

Generate a modular type scale with configurable base size, ratio, and CSS custom property output.

HTML Color Code Chart

Browse named HTML colors with HEX, RGB, and HSL values, search by name, and copy color codes.

CSS Gradient Text Generator

Create colorful gradient text effects using CSS background-clip with linear and radial gradient options.

SVG Blob Generator

Generate organic blob shapes in SVG with randomization, complexity, and color controls for modern UI design.

SVG Pattern Generator

Create seamless SVG background patterns with geometric shapes, lines, dots, and customizable colors.

CSS Background Pattern Generator

Generate pure CSS background patterns using gradients with stripes, dots, checkers, and geometric designs.

CSS Color to Filter Converter

Convert target colors to CSS filter property values for recoloring SVG and icon elements.

HEX to RGB Converter

Convert HEX color codes to RGB, RGBA, HSL, and HSLA values with visual color preview and copy options.

Color Scheme from Image

Upload an image and extract a cohesive color scheme with primary, secondary, and accent color suggestions.

Brand Color Generator

Generate brand color systems with primary, secondary, accent, neutral, and semantic color palettes.

Dashboard Layout Builder

Create dashboard layouts with drag-and-drop widget placeholders, charts, and data cards.

Grid Layout Designer

Visual grid system builder with customizable columns, gutters, and responsive breakpoints.

Responsive Breakpoint Designer

Preview and design layouts across mobile, tablet, and desktop breakpoints side by side.

Navigation Menu Builder

Design top nav, sidebar, hamburger, and mega menu patterns with live interactive preview.

Footer Layout Designer

Build website footer layouts with link columns, social icons, newsletter signup, and legal blocks.

Pricing Table Designer

Create pricing comparison tables with tiers, feature checkmarks, and highlighted plans.

Page Section Stacker

Stack and reorder pre-designed page sections to compose full-page layouts visually.

Card Layout Designer

Design card components with image, title, body, tags, and action button arrangements.

Hero Section Builder

Design hero sections with headline, subtext, CTA buttons, and background image placement.

Sidebar Layout Builder

Create sidebar layouts with collapsible panels, widget slots, and content area ratios.

Form UI Builder

Design form layouts with input fields, dropdowns, checkboxes, radio buttons, and validation states.

Modal Dialog Designer

Design modal and dialog components with headers, body content, actions, and overlay styles.

Tab Component Designer

Build tabbed interface components with horizontal, vertical, and pill-style tab variants.

Breadcrumb Designer

Create breadcrumb navigation patterns with separator styles, icons, and responsive truncation.

Tooltip & Popover Designer

Design tooltip and popover components with arrow placement, themes, and trigger behaviors.

Stepper & Wizard Designer

Build multi-step wizard and stepper components with progress indicators and step validation.

Notification Toast Designer

Design toast and notification components with positions, animations, and auto-dismiss timing.

Browser Mockup Generator

Place screenshots into realistic browser chrome frames with address bar and window controls.

Phone Mockup Generator

Place app screenshots into iPhone and Android phone frame mockups with customizable angles.

Tablet Mockup Generator

Display screenshots in iPad and tablet device frames in portrait or landscape orientation.

Laptop Mockup Generator

Embed screenshots into MacBook and laptop device frames with shadow and perspective options.

Multi-Device Mockup

Show your design across phone, tablet, and desktop devices in a single responsive preview scene.

App Store Screenshot Designer

Generate App Store and Play Store screenshot graphics with device frames, text, and backgrounds.

Smartwatch Mockup Generator

Display watch face and app screenshots in Apple Watch and smartwatch device frames.

TV Screen Mockup Generator

Place content into TV and monitor screen frames for living room and presentation previews.

Perspective Mockup Creator

Apply 3D perspective transforms to screenshots and images with adjustable angle and depth.

Clay Mockup Generator

Create trendy clay-style device mockups with soft shadows and matte color finishes.

Floating Mockup Scene

Compose floating device mockups with shadows, gradients, and decorative 3D shapes.

Website Full-Page Mockup

Display long scrolling website screenshots in a tilted browser window with gradient backgrounds.

Packaging Box Mockup

Wrap your designs onto 3D product box and packaging mockups with adjustable perspective.

3D Book Cover Preview

Preview book cover designs on realistic 3D book mockups with spine and back cover views.

T-Shirt Mockup Generator

Preview your logo and artwork designs on t-shirt mockups with color and position controls.

Mug Mockup Generator

Place designs on coffee mug mockups with wraparound preview and handle positioning.

Poster Frame Mockup

Display poster and art print designs in wall-mounted frame mockups with room settings.

3D Business Card Mockup

Preview business card designs on 3D stacked, fanned, and scattered card mockups.

Letterhead Mockup Generator

Preview letterhead and stationery designs on desk scene mockups with realistic shadows.

Label & Sticker Mockup

Preview label and sticker designs on bottles, jars, and product surfaces with bend effects.

Monogram Logo Maker

Create monogram and initial-based logos with font pairing, shapes, and color customization.

Wordmark Logo Builder

Design text-based wordmark logos with custom typography, letter spacing, and decorative elements.

Icon Editor

Create and edit icons on a pixel-perfect grid with vector shapes, strokes, and export options.

App Icon Designer

Design app icons with shape masks, rounded corners, and export at all required platform sizes.

Icon Set Builder

Build consistent icon sets with shared stroke width, corner radius, and grid alignment.

Emoji Maker

Create custom emoji and emoticons with face parts, accessories, and expression controls.

Logo Color Variation Tool

Preview your logo in multiple color schemes, dark/light backgrounds, and monochrome versions.

Logo Size Tester

Test logo legibility at various sizes from favicon to billboard with zoom and context previews.

Logo Watermark Maker

Convert your logo into semi-transparent watermark overlays with opacity and tiling controls.

Badge & Shield Designer

Design badges and shields with customizable shapes, text, icons, and ribbon elements.

Stamp & Seal Maker

Create circular stamps and official seal designs with border rings, stars, and curved text.

Favicon Multi-Size Preview

Preview favicon designs at 16px, 32px, and 180px with browser tab and bookmark bar context.

Geometric Logo Builder

Construct logos from geometric primitives with snap-to-grid alignment and symmetry tools.

Mascot Pose Editor

Adjust mascot character poses with drag-and-drop limb positioning and expression swaps.

Icon Stroke Weight Tester

Compare icon stroke weights from 1px to 4px across multiple icons for consistent visual weight.

Logo Animation Preview

Add reveal, morph, and bounce animations to your logo with timeline and easing controls.

QR Code Logo Blend

Embed a logo into QR codes with error correction to maintain scannability and brand identity.

Social Graphic Maker

Design social media posts with text, images, and brand elements for Instagram, X, and LinkedIn.

Instagram Story Maker

Create Instagram story graphics with text overlays, stickers, gradient backgrounds, and animations.

Reel Cover Designer

Design eye-catching cover images for Instagram Reels and TikTok videos with text and overlays.

YouTube Thumbnail Designer

Build high-CTR YouTube thumbnails with bold text, face cutouts, and background effects.

YouTube Banner Designer

Design YouTube channel banners with safe zone guides for desktop, mobile, and TV viewports.

X/Twitter Header Designer

Create X (Twitter) header images with avatar overlap preview and safe area guides.

LinkedIn Cover Designer

Design LinkedIn profile and company page banners with professional layouts and brand colors.

Facebook Cover Designer

Create Facebook cover photos and event banners with text-safe zones and mobile crop preview.

Pinterest Pin Designer

Design tall Pinterest pin graphics with layered text, product images, and branded footers.

Ad Banner Designer

Design display ad banners in standard IAB sizes with headline, image, and CTA button placement.

Carousel Post Maker

Design multi-slide carousel posts for Instagram and LinkedIn with consistent slide transitions.

Event Flyer Maker

Create event flyers and posters with date, venue, lineup, and ticket info layout blocks.

Coupon & Voucher Designer

Design discount coupons and vouchers with dashed borders, codes, and expiration details.

Menu Card Designer

Design restaurant and cafe menu cards with sections, prices, and decorative dividers.

Event Invitation Designer

Design wedding, party, and event invitation cards with RSVP details and decorative borders.

Quote Card Maker

Turn quotes into shareable social graphics with typography, backgrounds, and attribution styles.

Newsletter Header Designer

Design email newsletter header banners with logo placement, issue number, and date formatting.

Product Announcement Maker

Create product launch and feature announcement graphics with product shots and highlight text.

Sale Banner Generator

Generate sale and promotion banners with percentage-off callouts, countdown elements, and CTAs.

Podcast Cover Art Maker

Design square podcast cover art with title, host name, and artwork within Apple Podcasts specs.

Blog Featured Image Maker

Create blog post featured images with title text overlays, gradients, and brand-consistent styling.

Testimonial Card Designer

Design testimonial and review cards with quote marks, star ratings, and avatar placeholders.

Countdown Graphic Maker

Create event countdown graphics with day numbers, event branding, and social-ready formats.

Hiring Post Maker

Design "We\

Statistic Number Designer

Create bold statistic callout graphics with large numbers, units, labels, and context lines.

Progress Bar Designer

Create animated progress bars, skill bars, and completion indicators with custom styles.

Word Cloud Designer

Generate word clouds with custom shapes, fonts, color palettes, and word frequency weighting.

Data Table to Chart

Paste tabular data and instantly generate styled bar, line, or pie charts for presentations.

Slide Deck Builder

Build presentation slides with drag-and-drop text, images, shapes, and transition previews.

Pitch Deck Template Maker

Create startup pitch deck slides with problem, solution, market, traction, and ask templates.

Slide Master Designer

Design slide master templates with consistent fonts, colors, header/footer, and logo placement.

Presentation Color Theme

Generate cohesive color themes for presentations with primary, accent, and background palettes.

Slide Aspect Ratio Converter

Preview and adjust slide content between 16:9, 4:3, and custom aspect ratios with safe zones.

Speaker Notes Card Maker

Create printable speaker note cards with cue text, timing marks, and slide thumbnail references.

Slide Transition Preview

Preview and compare slide transition animations like fade, slide, zoom, and morph effects.

Presentation Timer Overlay

Full-screen countdown timer with customizable alerts for rehearsing presentation timing.

Slide Thumbnail Grid

Upload slides and view them as a sortable thumbnail grid to plan presentation flow and order.

Title Slide Generator

Generate presentation title slides with text hierarchy, background images, and brand elements.

Agenda Slide Maker

Create agenda and table of contents slides with numbered items, time allocations, and icons.

Thank You Slide Maker

Design closing and thank-you slides with contact info, QR codes, and social media handles.

Data Slide Designer

Design data-heavy presentation slides with chart placement, callout numbers, and annotations.

Team Slide Builder

Create team introduction slides with photo placeholders, names, titles, and bio snippets.

Certificate Designer

Design award certificates with ornamental borders, seals, signatures, and recipient name fields.

Name Tag & Badge Designer

Create conference name tags and ID badges with photo, name, title, and barcode layouts.

Ticket Designer

Design event tickets with seat info, tear-off stubs, QR codes, and perforation guides.

Gift Tag Maker

Create printable gift tags with custom shapes, hole punch marks, and "To/From" text fields.

Bookmark Designer

Design printable bookmarks with custom artwork, quotes, and standard bookmark dimensions.

Label Sheet Designer

Design labels for Avery-compatible label sheets with mail merge fields and alignment guides.

Envelope Designer

Design envelope layouts with return address, recipient address, and decorative element placement.

Brochure Fold Designer

Design bi-fold, tri-fold, and z-fold brochures with panel guides and fold line previews.

Poster Designer

Design posters with text hierarchy, image placement, and standard poster size templates.

Greeting Card Maker

Design folded greeting cards with front, inside, and back panels plus fold and cut guides.

Calendar Designer

Create printable monthly and yearly calendars with custom start days, holidays, and photo slots.

Planner Page Designer

Design daily, weekly, and monthly planner pages with customizable time blocks and task areas.

Report Cover Designer

Design professional report and proposal cover pages with title, author, date, and company branding.

Table Tent Card Maker

Design table tent cards with front and back panels, fold lines, and standing instructions.

Flashcard Designer

Design printable flashcards with front/back content, crop marks, and multi-up sheet layouts.

Resume Layout Designer

Design resume and CV layouts with sections for experience, skills, education, and contact info.

Comic Strip Maker

Create comic strips with customizable panel grids, speech bubbles, and caption boxes.

Album Art Designer

Design music album cover art with photo manipulation, typography, and standard CD/vinyl dimensions.

Shipping Label Designer

Design shipping labels with sender/recipient fields, barcodes, and carrier-specific templates.

Brush Stroke Preview

Preview and compare digital brush types including watercolor, oil, chalk, and marker strokes.

Shape Combiner

Combine geometric shapes with boolean operations: union, subtract, intersect, and exclude.

Mirror Symmetry Painter

Draw with real-time symmetry mirroring across 2 to 16 axes for mandala and pattern creation.

Spirograph Maker

Generate spirograph patterns with adjustable ring, wheel, and pen position parameters.

Line Art Generator

Convert photos into line art illustrations with adjustable edge detection and line thickness.

Dot Art Converter

Convert images into dot matrix art with adjustable dot size, spacing, and color modes.

Coloring Page Maker

Convert photos and illustrations into printable coloring pages with clean outlines.

Calligraphy Practice Pad

Practice calligraphy and lettering with pressure-sensitive strokes and guideline templates.

Pen Tool Trainer

Practice Bezier curve drawing with guided exercises and accuracy scoring for pen tool mastery.

Generative Art Studio

Create algorithmic art with particle systems, noise fields, and mathematical pattern generators.

Background Replacer

Replace image backgrounds with solid colors, gradients, or other images after removal.

Image Rounded Corner Tool

Apply rounded corners to images with adjustable radius and optional shadow effects.

Image Mirror & Flip

Create mirrored and flipped versions of images with optional seam blending for symmetry art.

Pixelation Censor Tool

Pixelate entire images or selected regions with adjustable block size for censoring or effects.

CSS Animation Builder

Build CSS keyframe animations with a visual timeline, easing curves, and live preview.

Easing Curve Editor

Design custom cubic-bezier easing curves with comparison previews against standard easings.

Scroll Animation Designer

Design scroll-triggered animations with parallax, fade, slide, and scale effects on elements.

Micro-Interaction Designer

Design button hover, click, toggle, and loading micro-interactions with timing controls.

Spinner Animation Maker

Create customizable loading spinners, progress rings, and skeleton screen animations.

Animated Text Generator

Create text animations with typing, wave, bounce, glitch, and character-by-character effects.

SVG Animation Editor

Animate SVG paths, shapes, and groups with a keyframe timeline and SMIL/CSS output.

Particle Effect Designer

Design particle systems with emitters, gravity, wind, and color transitions for web backgrounds.

Animated Gradient Maker

Create smoothly animated CSS gradient backgrounds with direction, speed, and color controls.

Animated Icon Maker

Add hover and click animations to icons with morph, rotate, bounce, and scale transitions.

Flip Card Animation Maker

Create 3D flip card animations with front and back face content and customizable flip direction.

Parallax Layer Editor

Design parallax scrolling scenes with layered elements at different scroll speed multipliers.

Animated Counter Maker

Create animated number counters that count up to target values with easing and formatting.

Image Carousel Builder

Build image carousels and sliders with transition effects, autoplay, and navigation controls.

Animated Background Maker

Create animated website backgrounds with waves, blobs, particles, and geometric patterns.

Lottie Animation Preview

Preview and inspect Lottie JSON animations with playback controls, speed, and color overrides.

Animated SVG Blob Maker

Generate animated organic blob shapes with morphing transitions and gradient fills.

Wave Divider Generator

Generate SVG wave section dividers with adjustable amplitude, frequency, and color layering.

Motion Path Animator

Animate elements along custom SVG paths with speed, rotation, and offset keyframe controls.

Palette from Photo

Upload a photo and extract a harmonious color palette with dominant, accent, and neutral colors.

Gradient Mesh Editor

Create complex multi-point gradient meshes by placing and coloring control points on a grid.

Type Scale Visualizer

Visualize and compare type scale ratios with live text rendering at each heading and body size.

Font Weight Explorer

Compare all available weights of a font family from thin to black with sample text rendering.

Image HSL Per-Channel Adjuster

Independently adjust hue, saturation, and lightness for individual color ranges in a photo.

Chromatic Aberration Effect

Add or fix chromatic aberration with per-channel RGB offset controls for creative glitch art.

Shape Crop Tool

Crop images into stars, hearts, hexagons, and other custom shapes with transparent backgrounds.

Bulk Image Resizer

Resize multiple images at once to the same dimensions or percentage with batch processing.

Image Canvas Extender

Extend image canvas with solid color, gradient, or mirrored edges without cropping the original.

Aspect Ratio Changer

Change image aspect ratio to 16:9, 4:3, 1:1, or custom ratios with smart crop or letterbox fill.

Image Deskew Tool

Automatically detect and correct tilted scans, documents, and crooked photos.

Content-Aware Scale (Seam Carving)

Resize images while preserving important content using seam carving for intelligent resizing.

Batch Image Cropper

Apply the same crop region to multiple images at once for consistent framing across a set.

Image to BMP Converter

Convert PNG, JPG, or WebP images to uncompressed BMP bitmap format for legacy applications.

Image to ICO Converter

Convert any image to multi-size ICO favicon files with 16x16, 32x32, and 48x48 layers.

Batch Image Format Converter

Convert multiple images between PNG, JPG, WebP, and AVIF in one batch with ZIP output.

Image Quality Comparison Tool

Compare image quality at different compression levels side-by-side to find the ideal file-size-to-quality ratio.

Batch Watermark Applier

Apply the same text or logo watermark to hundreds of images in a single batch with ZIP download.

Rounded Corners Maker

Add rounded corners to images with adjustable radius and transparent or colored background.

Image Date Stamp Tool

Add date/time stamps to photos in customizable format and position like vintage camera prints.

Pattern Overlay Generator

Overlay geometric patterns, grids, dots, or lines on images with blend mode and opacity.

Image Badge & Ribbon Adder

Add corner ribbons, badges, and banners to product or profile images with custom text.

Double Exposure Generator

Blend two images into a cinematic double-exposure effect using screen, multiply, or luminosity blend.

Triptych & Diptych Maker

Split a single photo into two or three evenly-spaced panels for wall art and print display.

Long Image Joiner

Join multiple images vertically or horizontally into one long seamless scrolling image.

Polaroid Frame Maker

Add a Polaroid-style instant photo frame with white borders and optional handwritten-style caption.

Device Mockup Generator

Place screenshots inside phone, laptop, tablet, and monitor mockup frames for presentations.

T-Shirt Mockup Generator

Place designs on realistic t-shirt mockups with color, size, and placement controls for merch previews.

Mug & Product Mockup Generator

Wrap designs onto mug, tote bag, and product mockups with perspective warping and shadows.

Browser Window Mockup

Wrap screenshots in realistic Chrome, Safari, or Firefox browser window frames with URL bar.

Magazine Cover Maker

Create magazine-style cover layouts with headlines, subheadings, barcode, and issue info.

Comic Strip Panel Maker

Layout images into comic strip panels with speech bubbles, captions, and halftone effects.

App Store Screenshot Maker

Create Apple App Store and Google Play screenshot graphics with device frames and marketing text.

Green Screen Keyer

Remove green or blue screen backgrounds with adjustable tolerance and spill suppression.

Magic Eraser (Brush)

Paint over areas to remove them using color-similarity flood-fill and replace with transparency.

Make Color Transparent

Click any color in an image to make it transparent with adjustable tolerance and anti-aliasing.

Soft Edge Fade Tool

Add soft gradient fading on any edge of an image for smooth transitions and blending.

Image Annotator

Draw arrows, rectangles, circles, and text annotations on screenshots and images.

Image Blur & Censor Tool

Blur, pixelate, or black-bar sensitive areas on screenshots and photos for privacy.

Image Step Numbering Tool

Add numbered step circles and connector lines to screenshots for tutorials and documentation.

Image Dimension Measurer

Measure pixel distances, draw dimension lines, and annotate sizes on images for design specs.

Simple Image Paint Tool

A lightweight painting tool with brush, pencil, eraser, fill, and shape tools on Canvas.

Pixel Art Editor

Create pixel art with a zoomable grid editor, color palette, layers, and export to PNG or GIF.

Rubber Stamp Effect Maker

Create realistic rubber stamp effects from text with distressed texture, circles, and ink bleed.

Speech Bubble Maker

Add comic-style speech bubbles, thought clouds, and callout boxes with custom text to images.

Freehand Drawing on Photo

Draw freehand sketches and doodles on top of photos with pressure-sensitive stylus support.

Shape Overlay Tool

Place customizable geometric shapes like circles, rectangles, triangles, and polygons on images.

GIF Crop & Resize

Crop and resize animated GIFs while preserving all frames and animation timing.

CSS Animation to GIF Exporter

Record a CSS animation playing in the browser and export it as an animated GIF file.

Photo Slideshow GIF Maker

Turn a set of photos into a slideshow GIF with transitions, timing, and size controls.

Typing Animation GIF Maker

Create animated GIFs of text being typed out character by character with cursor and custom fonts.

Multi-Size Favicon Generator

Generate favicons in all required sizes: ICO, PNG 16/32/48/180/192/512 from a single image.

Identicon Generator

Generate unique geometric identicons from any text input for user profiles and placeholders.

Icon Set Resizer

Resize a set of icons to multiple standard sizes (16, 24, 32, 48, 64, 128, 256) in one batch.

Image Gradient Creator

Create custom gradient images in linear, radial, and conic directions with downloadable PNG output.

Colored Placeholder Generator

Generate solid-color or gradient placeholder images at any size with optional text labels.

Texture Atlas Packer

Pack multiple textures into a single atlas image with JSON coordinate map for game engines.

Custom Emoji Maker

Design custom Slack/Discord emojis from images with crop, resize, and transparency tools.

Badge & Button Maker

Design circular, shield, and ribbon badges with text, icons, and borders for awards and labels.

Text Logo Maker

Create simple text-based logos with Google Fonts, colors, shadows, and transparent backgrounds.

Artistic QR Code with Image

Generate QR codes with a logo or image embedded in the center while maintaining scannability.

Geometric Pattern Generator

Generate repeating geometric patterns from basic shapes with customizable size, colors, and spacing.

Dot Art / Pointillism Generator

Convert images into dot-based pointillism art with adjustable dot size, spacing, and color sampling.

LEGO / Mosaic Builder

Convert images into LEGO brick or mosaic tile layouts with real brick colors and build instructions.

Audio Waveform Visualizer

Upload audio files and generate visual waveform images with customizable colors and dimensions.

Audio Spectrum Visualizer

Play audio with real-time frequency spectrum bars, circles, and particle visualizations.

Video Thumbnail Maker

Design eye-catching YouTube video thumbnails with images, text, icons, and borders at 1280x720.

Audio Waveform Image Exporter

Export publication-quality waveform images from audio files in PNG or SVG with custom styling.

Video Contact Sheet Generator

Generate a grid of thumbnails from a video at regular intervals for quick content overview.

Audio Spectrogram Image

Generate a full spectrogram heatmap image from audio files showing frequency over time.

Photo Slideshow Video Maker

Turn images into an MP4 video slideshow with transitions, music, and timing using WebCodecs.

Podcast / Video Cover Art Maker

Design square cover art for podcasts and video episodes with photo, title, and branding.

Social Media Banner Maker

Create banners for YouTube, Twitter/X, Facebook, and LinkedIn with templates and brand colors.

Instagram Story Maker

Design Instagram and TikTok story graphics at 1080x1920 with backgrounds, text, and stickers.

Open Graph / Link Preview Card Maker

Design Open Graph preview images at 1200x630 for professional link sharing on social media.

Presentation Slide Image Maker

Create 16:9 presentation slide images with text, charts, and icons exportable as PNG for decks.

Certificate & Diploma Maker

Design printable certificates with ornamental borders, signatures, seals, and custom text fields.

Security & Privacy (318)

Password Generator

Generate strong, random passwords with customizable length, character sets, and complexity requirements.

Password Strength Checker

Analyze password strength with entropy scoring, crack-time estimates, and improvement suggestions.

Random String Generator

Create cryptographically random strings for API keys, tokens, salts, and unique identifiers.

QR Code Generator

Create QR codes for URLs, text, Wi-Fi credentials, vCards, and more with customizable size and colors.

QR Code Reader

Scan and decode QR codes from uploaded images or your device camera to extract embedded data.

File Checksum Calculator

Compute MD5, SHA-1, SHA-256, and SHA-512 checksums to verify file integrity and detect tampering.

Text Encryption / Decryption

Encrypt and decrypt text using AES-256, RSA, or other ciphers with password-based key derivation.

Secure Note / Self-Destructing Message Creator

Create encrypted, self-destructing messages with expiration timers and single-view access links.

Privacy Policy Generator

Generate a customizable privacy policy for your website or app covering GDPR, CCPA, and cookie disclosures.

Cookie Policy Generator

Build a compliant cookie policy detailing cookie types, purposes, and user consent options.

Password Vault (Local)

Encrypted password storage using AES-256 with a master password. All data in localStorage - zero-knowledge, no server.

Steganography Tool

Hide secret text messages inside images using LSB encoding. Upload an image to encode or decode hidden text.

Two-Factor Auth Tester

Generate TOTP codes from a secret key (RFC 6238). Verify codes and test your 2FA setup in real time.

GPS Location Remover

Strip GPS coordinates and location data from photos for privacy protection.

Image Steganography Tool

Hide and extract secret text messages within image files using LSB encoding.

Image Hash Calculator

Calculate perceptual hash, MD5, SHA-256, and other hashes of image files.

Passphrase Generator

Generate memorable passphrases from random words with customizable word count, separators, and capitalization.

PIN Code Generator

Generate random PIN codes of configurable length with options to avoid sequential or repeated digits.

Data Breach Password Checker

Check if a password has appeared in known data breaches using k-anonymity with the HIBP API hash prefix.

Encryption Key Generator

Generate random AES-128, AES-256, and RSA key pairs using the Web Crypto API for development and testing.

MD5 Hash Generator

Generate MD5 hash digests from text or file input using client-side cryptographic operations.

SHA-1 Hash Generator

Compute SHA-1 hash values from text or files entirely in the browser using the WebCrypto API.

SHA-256 Hash Generator

Generate SHA-256 cryptographic hash digests from text or file input using the WebCrypto API.

SHA-512 Hash Generator

Compute SHA-512 hash values from text or files with hex, base64, and binary output formats.

SHA-384 Hash Generator

Generate SHA-384 cryptographic hashes from text or file input using the WebCrypto API.

Bcrypt Hash Generator

Generate bcrypt password hashes with configurable cost factor and verify passwords against existing hashes.

Hash Identifier

Automatically detect and identify the type of a hash string (MD5, SHA-1, SHA-256, bcrypt, etc.) by analyzing its format.

Hash Verifier

Verify file or text integrity by comparing computed hash values against expected hash digests.

HMAC Generator

Generate HMAC (Hash-based Message Authentication Code) signatures using SHA-256, SHA-512, or SHA-1 with a secret key.

Checksum Calculator

Calculate MD5, SHA-1, SHA-256, and CRC32 checksums for files to verify download integrity.

File Hash Calculator

Compute cryptographic hash digests for files of any size using streaming WebCrypto operations with progress tracking.

AES Encryption Tool

Encrypt and decrypt text using AES-256-GCM with password-derived keys via PBKDF2, entirely in the browser.

RSA Encryption Tool

Generate RSA key pairs and encrypt/decrypt messages using RSA-OAEP with the WebCrypto API.

File Encryption Tool

Encrypt and decrypt files of any type using AES-256-GCM with password-based key derivation, processed entirely client-side.

Text Encryption & Decryption

Encrypt and decrypt text messages using multiple cipher algorithms including AES, ChaCha20, and Triple DES.

PGP Key Generator

Generate PGP/GPG public and private key pairs with configurable key size and algorithm using OpenPGP.js.

PGP Encryption Tool

Encrypt and decrypt messages using PGP public/private keys with OpenPGP.js, fully client-side.

PGP Signature Verifier

Verify PGP/GPG digital signatures against public keys and sign messages with private keys.

CSR Generator

Generate Certificate Signing Requests (CSR) with custom subject fields and RSA/EC key pairs in the browser.

CSR Decoder

Decode and inspect Certificate Signing Request (CSR) files to view subject, key details, and extensions.

PEM to DER Converter

Convert certificates and keys between PEM (Base64 text) and DER (binary) encoding formats.

Self-Signed Certificate Generator

Generate self-signed X.509 certificates with custom subject, validity period, and key algorithm for development use.

JWT Generator

Create and sign JSON Web Tokens with custom claims, expiration, and HMAC or RSA signing algorithms.

JWT Validator

Validate JWT signatures using HMAC secrets or RSA/EC public keys and check claim expiration and audience.

TOTP Code Generator

Generate Time-based One-Time Password codes from a secret key, compatible with Google Authenticator and Authy.

HOTP Code Generator

Generate HMAC-based One-Time Password codes from a secret key and counter value for two-factor authentication.

API Key Generator

Generate secure API keys and access tokens with configurable formats, prefixes, and cryptographic randomness.

Secret Key Generator

Generate cryptographically secure secret keys for JWT signing, HMAC, AES encryption, and other applications.

RSA Key Pair Generator

Generate RSA public/private key pairs with configurable key sizes (2048, 3072, 4096-bit) in PEM format.

ECDSA Key Pair Generator

Generate Elliptic Curve key pairs (P-256, P-384, P-521) for digital signatures and key exchange.

Ed25519 Key Generator

Generate Ed25519 key pairs for high-performance digital signatures and SSH authentication.

SSH Key Generator

Generate SSH key pairs (RSA, ECDSA, Ed25519) in OpenSSH format with optional passphrase protection.

SSH Key Fingerprint Calculator

Calculate the fingerprint of an SSH public key in MD5 and SHA-256 formats for verification.

HSTS Header Builder

Configure HTTP Strict Transport Security headers with preload eligibility checking and max-age recommendations.

Permissions Policy Builder

Build Permissions-Policy (formerly Feature-Policy) headers to control browser feature access for your site.

SRI Hash Generator

Generate Subresource Integrity hashes for script and link tags to prevent CDN tampering attacks.

Security Regex Pattern Library

Browse and test common security-focused regex patterns for input validation, XSS prevention, and SQL injection detection.

SQL Injection Tester

Test SQL injection patterns against simulated query builders to learn about SQL injection prevention techniques.

HTML Sanitizer Tester

Test HTML sanitization by comparing raw input against DOMPurify and browser-native sanitization output.

Encrypted Clipboard

Temporarily store encrypted text snippets in browser memory with auto-expiry and one-click secure copy.

Terms of Service Generator

Generate terms of service agreements customized to your business type, service model, and legal requirements.

Cookie Consent Generator

Generate a GDPR/CCPA-compliant cookie consent banner with customizable categories, styling, and JavaScript code.

Data Processing Agreement Generator

Generate a GDPR-compliant Data Processing Agreement (DPA) for data processor relationships.

CCPA Compliance Checker

Assess CCPA (California Consumer Privacy Act) compliance with an interactive questionnaire and action plan.

JWK Generator

Generate JSON Web Keys (JWK) and JWK Sets for RSA, EC, and symmetric key types used in JOSE/JWT.

JWK to PEM Converter

Convert between JSON Web Key (JWK) format and PEM-encoded public/private keys.

OAuth Token Inspector

Decode and inspect OAuth 2.0 access tokens, refresh tokens, and ID tokens to view claims and metadata.

SAML Decoder

Decode and inspect SAML assertions, requests, and responses with XML formatting and attribute extraction.

SAML Validator

Validate SAML XML documents against SAML 2.0 schema and check for common configuration errors.

Passphrase Generator

Generate memorable but secure passphrases using the Diceware method with customizable word count and separators.

Password Hash Checker

Verify passwords against bcrypt, scrypt, Argon2, and PBKDF2 hash strings to confirm they match.

JWT Claims Inspector

Extract and display JWT claims as formatted JSON with registered claim explanations and timestamp conversion.

htpasswd Generator

Generate Apache htpasswd entries with bcrypt, MD5, or SHA-1 password hashing for HTTP basic auth.

Browser Fingerprint Tester

Analyze your browser fingerprint uniqueness by testing canvas, WebGL, audio, font, and API-based fingerprinting vectors.

WebRTC Leak Tester

Test if your browser leaks your real IP address through WebRTC APIs even when using a VPN.

DNS Leak Tester

Test for DNS leaks that could expose your browsing activity when using a VPN or proxy service.

Browser Privacy Tester

Comprehensive privacy audit testing tracking protection, cookie handling, fingerprinting resistance, and API exposure.

Do Not Track Tester

Check if your browser sends Do Not Track (DNT) and Global Privacy Control (GPC) signals correctly.

EXIF Data Remover

Strip all EXIF metadata from photos to protect privacy before sharing, processed entirely in the browser.

Email Header Analyzer

Parse and analyze email headers to trace delivery path, check SPF/DKIM/DMARC, and detect spoofing indicators.

SPF Record Generator

Build SPF DNS records with an interactive tool to authorize email senders and prevent spoofing.

DKIM Record Generator

Generate DKIM key pairs and DNS TXT records for email authentication and anti-spoofing protection.

DMARC Record Generator

Build DMARC DNS records with policy configuration, reporting settings, and alignment mode selection.

URL Expander

Expand shortened URLs to reveal their final destination before clicking, with redirect chain display.

String Hash Generator

Generate multiple hash types (MD5, SHA-1, SHA-256, SHA-512) from a single text input for easy comparison.

PBKDF2 Key Derivation

Derive cryptographic keys from passwords using PBKDF2 with configurable iterations, salt, and hash algorithm.

Argon2 Hash Generator

Generate Argon2id password hashes with configurable memory, iterations, and parallelism parameters.

Scrypt Hash Generator

Generate scrypt password hashes with configurable CPU/memory cost parameters and salt generation.

Digital Signature Tool

Create and verify digital signatures using RSA-PSS or ECDSA with the WebCrypto API.

Entropy Calculator

Calculate Shannon entropy of text or data to measure randomness and information content in bits.

Secure Random Number Generator

Generate cryptographically secure random numbers within custom ranges using the Web Crypto API.

Secure File Shredder

Overwrite file contents with random data before deletion to prevent recovery, using client-side processing.

ASN.1 Decoder

Decode ASN.1/DER encoded data into a human-readable tree structure for certificate and key inspection.

PKCS#12 / PFX Converter

Convert between PKCS#12 (.pfx/.p12) and PEM format certificates and private keys.

OpenSSL Command Generator

Generate OpenSSL commands for common operations like CSR creation, certificate conversion, and key generation.

SSL/TLS Config Generator

Generate secure SSL/TLS configuration for Apache, Nginx, and HAProxy with modern cipher suite recommendations.

Cipher Suite Reference

Browse and search TLS cipher suites with security ratings, protocol compatibility, and recommendation status.

Password Exposure Checker

Check if a password has been exposed in data breaches using k-anonymity hash prefix matching via HIBP.

Security Checklist Generator

Generate customized web application security checklists based on your tech stack, deployment, and compliance needs.

OWASP Top 10 Reference

Interactive reference for OWASP Top 10 vulnerabilities with examples, mitigations, and code snippets.

CVE Lookup Tool

Search and browse Common Vulnerabilities and Exposures entries with severity scores and affected products.

Encryption Strength Calculator

Calculate the brute-force resistance of encryption keys by key length, algorithm, and estimated attacker capability.

Secure Password Sharing

Generate encrypted one-time links for sharing passwords securely with AES-256-GCM encryption in URL fragments.

Secret Message Encoder

Encode messages using various methods including zero-width characters, invisible ink Unicode, and whitespace encoding.

2FA Backup Code Generator

Generate secure backup/recovery codes for two-factor authentication with configurable format and quantity.

TOTP QR Code Generator

Generate QR codes for TOTP authenticator app setup with configurable issuer, account, and algorithm parameters.

OpenVPN Config Generator

Generate OpenVPN client and server configuration files with customizable encryption, routing, and DNS settings.

WireGuard Config Generator

Generate WireGuard VPN configuration files with key pair generation and peer configuration.

Firewall Rule Generator

Generate firewall rules for iptables, nftables, UFW, and Windows Firewall with an interactive rule builder.

IP ACL Builder

Build IP access control lists for web servers and firewalls with CIDR support and rule ordering.

JWT RS256 Key Generator

Generate RSA key pairs specifically formatted for JWT RS256 signing with PEM and JWK output.

Hash Comparison Tool

Compare two hash values side-by-side with visual highlighting of matching and differing characters.

OTP URI Parser

Parse and validate otpauth:// URIs used by authenticator apps to extract TOTP/HOTP configuration parameters.

GPG Key Analyzer

Parse and analyze GPG/PGP public keys to display key ID, fingerprint, user IDs, subkeys, and expiration.

X.509 Certificate Builder

Build X.509 certificates with custom extensions, SANs, key usage, and extended key usage fields.

Certificate Key Matcher

Verify that a certificate and private key match by comparing their public key modulus fingerprints.

XOR Cipher Tool

Apply XOR cipher operations with single-byte and multi-byte keys with hex input/output and key analysis.

Hash Rate Calculator

Calculate brute-force attack times based on hash rate, password complexity, and character set size.

Secure Headers Scanner

Scan a website's HTTP response headers and grade its security posture with actionable improvement suggestions.

Data Masking Tool

Mask sensitive data (emails, phone numbers, credit cards, SSNs) in text with configurable masking patterns.

PII Detector

Detect personally identifiable information (emails, phones, SSNs, addresses) in text using pattern matching.

Credit Card Validator

Validate credit card numbers using the Luhn algorithm with card network detection and BIN lookup.

Cryptographic Key Inspector

Paste any cryptographic key (RSA, EC, Ed25519) to inspect key type, size, curve, and public key components.

Secret Scanner

Scan text or code for accidentally exposed secrets like API keys, tokens, passwords, and private keys using pattern matching.

Code Obfuscator

Obfuscate JavaScript code to make it harder to reverse-engineer with variable renaming and control flow transformations.

Key Derivation Calculator

Derive cryptographic keys from passwords using PBKDF2, HKDF, and scrypt with configurable parameters.

SHA-3 Hash Generator

Generate SHA-3 (Keccak) hash values in SHA3-224, SHA3-256, SHA3-384, and SHA3-512 variants.

BLAKE2 Hash Generator

Generate BLAKE2b and BLAKE2s hash values with configurable digest length and key parameters.

RIPEMD-160 Hash Generator

Generate RIPEMD-160 hash values from text or file input, commonly used in Bitcoin address derivation.

PGP Keyserver Search

Search public PGP keyservers for encryption keys by email, name, or key ID via public APIs.

Encrypted QR Code Generator

Generate QR codes containing AES-encrypted data that requires a password to decode the embedded message.

Privacy Risk Assessor

Evaluate the privacy risk of your website or app by answering questions about data collection and processing practices.

DPIA Template Generator

Generate Data Protection Impact Assessment templates with risk matrices and mitigation planning sections.

Incident Response Template Generator

Generate security incident response plan templates customized to your organization type and compliance requirements.

security.txt Generator

Generate RFC 9116 compliant security.txt files with contact, encryption, acknowledgments, and policy fields.

CAA Record Generator

Generate DNS CAA records to control which Certificate Authorities can issue certificates for your domain.

Email Security Checker

Check a domain's email security setup by looking up SPF, DKIM, DMARC, and MTA-STS DNS records.

MTA-STS Policy Generator

Generate MTA-STS policy files and DNS records to enforce TLS for incoming email connections.

BIMI Record Generator

Generate Brand Indicators for Message Identification DNS records to display your logo in email clients.

Encryption Benchmark

Benchmark WebCrypto API encryption and hashing performance in your browser across different algorithms and key sizes.

Permissions Policy Generator

Build Permissions-Policy HTTP headers to control browser feature access for camera, microphone, and geolocation.

Referrer Policy Generator

Select and configure the optimal Referrer-Policy header with comparison of all policy options and their effects.

Text Encryption / Decryption

Encrypt and decrypt text using AES, DES, and other algorithms with key and IV configuration options.

RSA Key Pair Generator

Generate RSA public/private key pairs using the Web Crypto API with configurable key sizes.

CSR Generator

Generate Certificate Signing Requests with organization, domain, and key information using Web Crypto API.

AES Encryption / Decryption

Encrypt and decrypt files or text with AES-128, AES-192, or AES-256 in CBC, CTR, or GCM mode using Web Crypto API.

RSA Key Pair Generator

Generate RSA-2048, RSA-3072, or RSA-4096 key pairs in PEM format for signing and encryption, entirely in-browser.

ChaCha20-Poly1305 Encryption

Encrypt and decrypt data using ChaCha20-Poly1305 AEAD cipher with authenticated encryption and nonce management.

File Encryption / Decryption

Encrypt any file with AES-256-GCM and a password-derived key. Download the encrypted blob or decrypt it back.

RSA Encrypt / Decrypt Tool

Encrypt short messages with an RSA public key and decrypt with the private key using OAEP padding.

XOR Cipher Tool

Apply XOR cipher to text or binary data with a repeating key. Visualize bitwise operations step by step.

Vigenere Cipher Encoder / Decoder

Encode and decode messages using the Vigenere polyalphabetic cipher with frequency analysis and key-length detection.

Caesar Cipher with Brute-Force

Encrypt and decrypt with Caesar shift cipher. Includes brute-force attack showing all 26 rotations simultaneously.

One-Time Pad Generator

Generate cryptographically random one-time pads and encrypt messages with provably unbreakable XOR encryption.

Enigma Machine Simulator

Interactive Enigma machine simulation with configurable rotors, reflectors, and plugboard. Encrypt messages like WWII operators.

SHA-3 / Keccak Hash Generator

Compute SHA3-224, SHA3-256, SHA3-384, SHA3-512, and SHAKE hashes for text or files using the Keccak sponge construction.

BLAKE2 / BLAKE3 Hash Generator

Generate BLAKE2b, BLAKE2s, and BLAKE3 hashes for text or files. Compare speeds against SHA-256 in real time.

Argon2 Key Derivation Tool

Derive keys from passwords using Argon2id with configurable memory cost, time cost, and parallelism parameters.

PBKDF2 Key Derivation Tool

Derive cryptographic keys from passwords using PBKDF2 with SHA-256 or SHA-512 and configurable iteration counts.

scrypt Key Derivation Tool

Derive keys using scrypt with configurable N, r, p parameters. Visualize memory-hardness and compare with PBKDF2.

bcrypt Hash Generator & Verifier

Generate bcrypt password hashes with configurable cost factor and verify passwords against existing hashes.

HMAC Generator & Verifier

Compute HMAC-SHA256, HMAC-SHA384, HMAC-SHA512 message authentication codes for text or files and verify signatures.

Hash Type Identifier

Paste any hash and automatically identify its type (MD5, SHA-1, SHA-256, bcrypt, Argon2, etc.) by format and length.

CRC-32 Checksum Calculator

Compute CRC-32, CRC-16, and Adler-32 checksums for text or file data with polynomial configuration options.

Hash Speed Comparison Benchmark

Benchmark hash functions (MD5, SHA-1, SHA-256, SHA-3, BLAKE3) in your browser and compare throughput in real time.

ECDSA Digital Signature Tool

Sign and verify messages with ECDSA using P-256, P-384, or P-521 curves via Web Crypto API.

RSA-PSS Signature Tool

Sign documents with RSA-PSS and verify signatures. Supports RSA-2048 through RSA-4096 key sizes.

Ed25519 Signature Tool

Generate Ed25519 key pairs, sign messages, and verify signatures using the EdDSA algorithm with Curve25519.

PGP / GPG Key Pair Generator

Generate OpenPGP key pairs (RSA or ECC) with user ID, expiration, and passphrase protection. Export as ASCII-armored text.

PGP Encrypt / Decrypt Messages

Encrypt messages with a PGP public key and decrypt with the private key. Supports ASCII-armored input and output.

PGP Sign & Verify Messages

Create PGP cleartext signatures and verify signed messages against a public key. Detached signature support included.

Code Signing Verifier

Verify code signatures and integrity hashes for downloaded files. Compare expected vs. computed SHA-256 digests.

SSH Key Pair Generator

Generate SSH key pairs (RSA, Ed25519, ECDSA) with configurable bit length. Download public and private keys.

SSH Key Fingerprint Calculator

Compute MD5 and SHA-256 fingerprints for SSH public keys. Verify server key authenticity visually.

ECDH Key Exchange Simulator

Simulate Elliptic Curve Diffie-Hellman key exchange between two parties. Visualize the shared secret derivation process.

Diffie-Hellman Key Exchange Visualizer

Interactive visualization of classical Diffie-Hellman key exchange with color-mixing analogy and modular arithmetic steps.

API Key Generator

Generate cryptographically secure API keys with configurable prefixes, lengths, and character sets. Copy-ready output.

Encryption Key Manager (Local)

Store and organize encryption keys locally with labels, expiry dates, and key type metadata. All data in IndexedDB.

PEM File Parser & Inspector

Parse PEM-encoded certificates, keys, and CSRs. Display algorithm, key size, subject, issuer, and validity details.

JWK / PEM Key Converter

Convert between JWK (JSON Web Key) and PEM formats for RSA and EC keys. Supports PKCS#8 and SPKI formats.

JWT Signature Verifier

Verify JWT signatures with HMAC, RSA, or ECDSA keys. Check expiration, issuer, audience, and custom claim validation.

JWT Debugger & Inspector

Decode and inspect JWT headers, payloads, and signatures with syntax highlighting and human-readable timestamps.

OAuth 2.0 Flow Debugger

Debug OAuth 2.0 authorization code, implicit, and PKCE flows. Inspect tokens, scopes, and redirect parameters.

SAML Assertion Decoder

Decode and inspect SAML assertions and responses. View XML attributes, conditions, and signature details.

CSRF Token Generator

Generate cryptographically secure CSRF tokens with configurable entropy. Includes HTML form snippet and cookie-based patterns.

Opaque Token Generator

Generate URL-safe, Base64, or hex-encoded opaque bearer tokens with selectable entropy (128-512 bits).

Shamir Secret Sharing Tool

Split a secret into N shares where any K shares can reconstruct it. Uses polynomial interpolation over a finite field.

Visual Secret Sharing (Image Split)

Split an image into visual cryptographic shares that reveal the secret only when overlaid. Based on Naor-Shamir scheme.

Zero-Knowledge Proof Demo

Interactive demonstration of zero-knowledge proofs. Prove you know a secret without revealing it using graph coloring and cave analogy.

Cryptographic Commitment Scheme

Create binding commitments to values using hash-based commitment schemes. Reveal and verify later without trust.

Secret Key Escrow Manager

Split master keys into escrow shares for disaster recovery. Assign custodians and track share distribution.

Browser Fingerprint Tester

Analyze your browser fingerprint including canvas, WebGL, audio context, fonts, and navigator properties. See how unique you are.

Website Tracker Detector

Scan page source for known tracking pixels, analytics scripts, and third-party beacons. Identify all trackers on a page.

Canvas Fingerprint Defender

Test and demonstrate canvas fingerprinting techniques. Generate noise-injected canvas to show how defenders work.

WebRTC Leak Tester

Detect WebRTC IP leaks that can expose your real IP address even behind a VPN. Shows local, public, and ICE candidates.

DNS Leak Tester

Test for DNS leaks that might reveal your browsing activity to your ISP despite using a VPN or proxy.

Privacy Score Checker

Get an overall privacy score for your browser setup based on fingerprint uniqueness, leak tests, and security headers.

Do Not Track / GPC Signal Tester

Check if your browser sends Do Not Track (DNT) and Global Privacy Control (GPC) signals and whether sites respect them.

Third-Party Cookie Tester

Test whether your browser blocks third-party cookies. Explains implications for tracking and privacy.

Document Metadata Privacy Scanner

Scan PDFs, images, and Office files for hidden metadata including author, GPS, edit history, and embedded comments.

Anonymous Identity Generator

Generate realistic but fake identities for testing forms and signups. Names, addresses, emails - all synthetic data.

IP Address Lookup & Geolocation

Look up your current IP address with geolocation, ASN, ISP, and reverse DNS information displayed on a map.

Subnet Calculator

Calculate subnet masks, network addresses, broadcast addresses, and host ranges for IPv4 and IPv6 CIDR blocks.

CIDR Range Calculator & Visualizer

Visualize CIDR blocks, calculate IP ranges, and check if addresses fall within subnets. Supports IPv4 and IPv6.

IPv6 Address Expander / Compressor

Expand shortened IPv6 addresses to full form and compress verbose addresses. Validate and analyze IPv6 notation.

IP Range Merger & Optimizer

Merge overlapping IP ranges, aggregate CIDR blocks, and minimize firewall rules. Supports allow/deny list optimization.

DNS Record Lookup

Query A, AAAA, MX, TXT, CNAME, NS, SOA, and SRV records for any domain using DNS over HTTPS.

DNS Propagation Checker

Check DNS propagation across global resolvers. See if your DNS changes have propagated to servers worldwide.

SPF Record Checker & Builder

Validate SPF records for email authentication. Build new records with include, ip4, ip6, and redirect mechanisms.

DKIM Record Checker

Look up and validate DKIM DNS records for email domain authentication. Verify selector, key type, and key data.

DMARC Record Checker & Builder

Check DMARC records for email security. Build policies with reject/quarantine/none, reporting URIs, and alignment modes.

MX Record Checker & Priority Viewer

Look up MX records for any domain to see mail server priorities, verify mail routing, and detect misconfigurations.

Network Port Reference & Scanner

Reference database of common TCP/UDP ports with service names. Test port connectivity to your own servers.

Permissions Policy Generator

Build Permissions-Policy headers to control browser features like camera, microphone, geolocation, and payment APIs.

Referrer Policy Tester

Test and configure Referrer-Policy headers. Visualize which referrer information is sent for different policy values.

X-Frame-Options & Clickjacking Tester

Test X-Frame-Options and CSP frame-ancestors directives. Demonstrate clickjacking attacks and defenses.

Cookie Consent Compliance Scanner

Scan a site for cookie consent compliance. Check if cookies are set before consent and categorize by purpose.

Session Token Entropy Analyzer

Analyze session token randomness and entropy. Detect patterns, weak PRNGs, and predictable session identifiers.

SSL Certificate Chain Viewer

Visualize the complete SSL certificate chain from leaf to root CA. Check chain completeness and intermediate certificates.

CSR (Certificate Signing Request) Generator

Generate Certificate Signing Requests with subject fields, key type selection, and SAN (Subject Alternative Names).

Self-Signed Certificate Generator

Generate self-signed X.509 certificates for development and testing. Configure validity period, key usage, and SANs.

SQL Injection Pattern Tester

Test SQL injection patterns in a local sandbox. Practice detection and learn about parameterized queries.

SRI (Subresource Integrity) Hash Generator

Generate Subresource Integrity hashes for script and link tags. Paste a CDN URL or file to compute sha256/sha384/sha512.

security.txt Generator

Generate a standards-compliant security.txt file (RFC 9116) with contact, encryption, acknowledgments, and policy fields.

Website Technology Detector

Detect technologies used by a website: frameworks, CMS, analytics, CDN, hosting, and server software from client-side signals.

URL Safety Scanner

Analyze URLs for phishing indicators: homograph attacks, suspicious TLDs, URL shortener chains, and known malicious patterns.

Phishing URL Pattern Detector

Detect phishing URLs using heuristics: IDN homograph detection, brand impersonation, suspicious subdomains, and path analysis.

URL Unshortener & Redirect Tracer

Expand shortened URLs (bit.ly, t.co, etc.) and trace the full redirect chain to see the final destination safely.

IDN Homograph Attack Detector

Detect internationalized domain name (IDN) homograph attacks using confusable Unicode characters that mimic ASCII domains.

Email Header Analyzer

Parse and analyze email headers to trace message routing, verify SPF/DKIM/DMARC authentication, and detect spoofing.

Safe Link Preview Generator

Generate a safe preview of any URL showing its title, description, and screenshot without visiting it directly.

Malware Hash Checker

Check file hashes (MD5, SHA-1, SHA-256) against known malware databases. Upload a file to compute and verify its hash.

YARA Rule Builder

Build YARA rules visually with string patterns, hex patterns, and conditions. Export rules for malware detection scanning.

IOC (Indicator of Compromise) Extractor

Extract IOCs from threat reports: IP addresses, domains, URLs, file hashes, email addresses, and Bitcoin wallets.

Threat Intelligence Feed Parser

Parse STIX/TAXII, CSV, and JSON threat intelligence feeds. Normalize IOCs and export in standard formats.

MITRE ATT&CK Navigator

Interactive MITRE ATT&CK matrix viewer. Map techniques to tactics, highlight coverage, and export layer files.

CVE Lookup & Details Viewer

Search for Common Vulnerabilities and Exposures (CVE) by ID. View CVSS scores, descriptions, and affected products.

CVSS Score Calculator

Calculate CVSS v3.1 and v4.0 vulnerability scores with the full base, temporal, and environmental metric groups.

Canary Token Generator

Generate honeypot tokens (URLs, DNS names, email addresses, files) that alert you when accessed by an attacker.

Honeypot Detector

Analyze network responses and service banners to detect honeypots. Identify telltale signs of deception infrastructure.

Security Log Analyzer

Parse and analyze security logs (Apache, Nginx, auth.log). Detect brute force attempts, anomalies, and suspicious patterns.

Apache / Nginx Log Parser

Parse Apache Combined and Nginx access logs. Visualize top IPs, URIs, status codes, and user agents with charts.

JSON Log Viewer & Filter

View and filter JSON-structured logs with search, time range selection, severity filtering, and field extraction.

Syslog Message Parser

Parse RFC 3164 and RFC 5424 syslog messages. Extract facility, severity, timestamp, hostname, and message fields.

User Agent String Analyzer

Parse and analyze user agent strings to identify browser, OS, device type, and bot/crawler signatures.

Timestamp Forensics Tool

Convert and analyze timestamps from various formats (Unix, Windows FILETIME, NTFS, HFS+) for digital forensics.

Hex Dump Viewer

View files as hex dumps with ASCII representation. Search for patterns, identify file magic bytes, and analyze binary data.

Base64 File Analyzer

Decode Base64 strings to reveal hidden file types. Detect embedded images, scripts, and binary data in encoded strings.

Incident Response Checklist Generator

Generate customizable incident response checklists based on NIST 800-61 phases: preparation, detection, containment, recovery.

Incident Timeline Builder

Build visual timelines for security incidents. Add events with timestamps, categories, and evidence references.

Data Breach Notification Template

Generate GDPR/CCPA-compliant data breach notification letters. Customize affected data types, timeline, and remediation steps.

Evidence Hash Chain Builder

Build a tamper-evident hash chain for digital evidence. Each file gets a timestamped hash linked to the previous entry.

ReDoS (Regex DoS) Tester

Test regular expressions for catastrophic backtracking vulnerabilities. Measure execution time with adversarial inputs.

Sensitive Data Regex Library

Library of regex patterns for detecting SSNs, credit cards, API keys, passwords, and PII in text. Test patterns on sample data.

Hex Encoder / Decoder

Convert text to hexadecimal and back. Supports ASCII, UTF-8, and raw binary hex with delimiter options.

Punycode / IDN Converter

Convert between Unicode domain names and Punycode (xn--) representations. Detect homograph attack attempts.

ROT13 / ROT47 Encoder

Apply ROT13 (letters only) or ROT47 (all printable ASCII) rotation ciphers. Instant encode/decode toggle.

HTML Sanitizer & XSS Cleaner

Sanitize HTML input by removing dangerous tags, attributes, and event handlers. Preview safe output in an isolated iframe.

JavaScript Deobfuscator

Deobfuscate packed and obfuscated JavaScript code. Detect eval-based packers, hex encoding, and string rotation.

Entropy Analyzer

Calculate Shannon entropy of text, files, or byte sequences. Visualize entropy distribution to detect encrypted or compressed data.

Cryptographic Random Number Generator

Generate cryptographically secure random numbers using Web Crypto API. Supports integer ranges, floats, and byte arrays.

Diceware Passphrase Generator

Generate strong passphrases using the Diceware method with EFF word lists. Estimate entropy and crack time.

UUID v7 Generator & Inspector

Generate time-ordered UUID v7 tokens (RFC 9562) and inspect existing UUIDs to extract timestamps and random bits.

NanoID Generator

Generate compact, URL-safe unique IDs with NanoID algorithm. Configure alphabet, length, and collision probability display.

TCP Flag Calculator

Calculate TCP flag values (SYN, ACK, FIN, RST, PSH, URG) from decimal, hex, or binary. Visualize flag combinations.

IP Header Decoder

Decode IPv4 and IPv6 packet headers from hex dumps. Visualize fields: version, TTL, protocol, source/destination.

MAC Address Lookup & Generator

Look up MAC address vendor (OUI) information. Generate random MAC addresses with optional vendor prefix.

Network Bandwidth Calculator

Calculate data transfer times, bandwidth requirements, and throughput. Convert between Mbps, MB/s, and transfer durations.

Network Latency Tester

Measure round-trip latency to endpoints using fetch timing API. Graph latency over time and compute statistics.

PCAP Summary Viewer

Upload PCAP files and view packet summaries: protocol distribution, top talkers, connection pairs, and flow statistics.

Firewall Rule Builder

Build firewall rules visually for iptables, nftables, and cloud security groups. Export as commands or JSON configs.

ACL / Permission Calculator

Calculate Unix file permissions (chmod), AWS IAM policies, and Kubernetes RBAC rules. Visualize access matrices.

Nginx Security Config Generator

Generate secure Nginx server blocks with TLS, HSTS, CSP, rate limiting, and access control configurations.

Apache Security Config Generator

Generate secure Apache .htaccess and httpd.conf snippets for TLS, headers, mod_security, and access control.

Data Masking Tool

Mask sensitive data in text: credit cards, SSNs, emails, phone numbers, and names. Configurable masking patterns.

Text Anonymizer

Anonymize text by replacing personal names, addresses, phone numbers, and emails with placeholder tokens.

Synthetic Data Generator

Generate realistic synthetic datasets that preserve statistical properties without containing real personal information.

CCPA / CPRA Compliance Checker

Assess CCPA/CPRA compliance for California consumer privacy. Evaluate disclosure, opt-out, and deletion requirements.

DPIA Template Generator

Generate Data Protection Impact Assessment templates with risk matrices, necessity analysis, and mitigation measures.

Security Asset Inventory Tracker

Track IT assets with security metadata: OS versions, patch levels, ownership, and classification. Export inventory reports.

Encrypted Clipboard

Encrypt clipboard text with a passphrase before sharing. Recipient decrypts with the same passphrase. Zero-server design.

Dead Drop Encrypted Message

Create encrypted messages encoded as URL fragments. The secret never touches a server - decryption happens locally.

Secure File Drop (Encrypted)

Encrypt a file with a password and generate a download link containing the encrypted payload as a data URL.

Signal Protocol Visualizer

Interactive visualization of the Signal/Double Ratchet protocol. Step through key exchanges, ratchet advances, and message encryption.

age File Encryption Tool

Encrypt and decrypt files using the age encryption format. Support for passphrase and X25519 recipient keys.

Ethereum Address Validator

Validate Ethereum addresses with EIP-55 checksum verification. Detect invalid addresses and mixed-case checksums.

Bitcoin Address Validator

Validate Bitcoin addresses (P2PKH, P2SH, Bech32, Bech32m). Detect address type and check Base58/Bech32 checksums.

BIP-39 Mnemonic Seed Generator

Generate BIP-39 mnemonic seed phrases (12/24 words) with entropy validation. Verify existing mnemonics and compute seeds.

Merkle Tree Visualizer

Build and visualize Merkle trees from data blocks. Demonstrate proof verification and tamper detection visually.

Local Blockchain Simulator

Interactive blockchain simulator: mine blocks, add transactions, visualize hashing, and demonstrate proof-of-work concepts.

TOTP Secret Key Generator

Generate TOTP secret keys with QR codes for authenticator apps. Configure period, digits, and algorithm (SHA-1/SHA-256/SHA-512).

HOTP Counter-Based Code Generator

Generate HOTP (HMAC-based One-Time Password) codes with counter-based increments per RFC 4226.

WebAuthn / FIDO2 Debugger

Test WebAuthn registration and authentication flows. Inspect attestation objects, assertions, and credential details.

Passkey Compatibility Tester

Test your browser and device support for passkeys (WebAuthn). Check platform authenticator and cross-platform capabilities.

OAuth PKCE Code Challenge Generator

Generate PKCE code_verifier and code_challenge pairs for OAuth 2.0 authorization code flow with S256 method.

Basic Auth Header Generator

Generate and decode HTTP Basic Authentication headers (Base64 user:password). Includes cURL command output.

Bearer Token Tester

Test API endpoints with bearer tokens. Send authenticated requests and inspect response headers and status codes.

.env File Validator

Validate .env files for syntax errors, missing required variables, duplicate keys, and exposed secrets.

Secret Scanner for Code

Scan code snippets for accidentally committed secrets: API keys, tokens, passwords, and private keys.

Git Diff Secret Finder

Paste git diffs and detect leaked credentials, tokens, and secrets using pattern-matching rules.

Dockerfile Security Scanner

Scan Dockerfiles for security issues: running as root, hardcoded secrets, missing health checks, and insecure base images.

Kubernetes RBAC Analyzer

Analyze Kubernetes RBAC configurations (Roles, ClusterRoles, Bindings) for overly permissive or risky access grants.

Terraform Security Scanner

Scan Terraform HCL files for security misconfigurations: open security groups, public S3 buckets, and missing encryption.

GitHub Actions Security Checker

Analyze GitHub Actions workflows for security risks: script injection, unpinned actions, and secret exposure.

Terms of Service Generator

Generate customizable Terms of Service agreements covering liability, intellectual property, termination, and dispute resolution.

Data Processing Agreement Generator

Generate GDPR-compliant Data Processing Agreements (DPA) with sub-processor lists, security measures, and data transfer terms.

Cookie Banner Code Generator

Generate cookie consent banner HTML/CSS/JS with consent categories, preference storage, and GDPR-compliant flows.

Block Cipher Mode Visualizer

Visualize how ECB, CBC, CTR, GCM, and OFB modes work with animated block diagrams showing IV, chaining, and feedback.

Elliptic Curve Cryptography Visualizer

Interactive visualization of elliptic curves showing point addition, scalar multiplication, and ECDH key exchange.

AES Round Function Visualizer

Step through AES encryption rounds: SubBytes, ShiftRows, MixColumns, and AddRoundKey with state matrix visualization.

Public Key Cryptography Explainer

Interactive explainer of public key cryptography concepts: key generation, encryption, signing, and the math behind RSA.

OWASP Top 10 Interactive Reference

Interactive reference for OWASP Top 10 vulnerabilities with descriptions, examples, mitigations, and code samples.

Cipher Suite String Explainer

Decode TLS cipher suite names (e.g., TLS_AES_128_GCM_SHA256) into human-readable components: key exchange, cipher, and hash.

Security Acronym Glossary

Searchable glossary of 500+ cybersecurity acronyms and terms with definitions, related concepts, and RFC references.

ASN.1 / DER Decoder

Decode ASN.1 structures in DER or BER encoding. Visualize the TLV (Tag-Length-Value) tree for certificates and keys.

Bitwise Operation Calculator

Perform AND, OR, XOR, NOT, shifts, and rotations on binary, hex, or decimal values. Visualize bit patterns.

Prime Number Tester & Generator

Test primality using Miller-Rabin algorithm. Generate large primes for cryptographic key generation.

Modular Arithmetic Calculator

Perform modular exponentiation, GCD, modular inverse, and Chinese Remainder Theorem calculations for cryptography.

Math & Calculators (251)

Percentage Calculator

Calculate percentages, percentage change, and what percent one number is of another with step-by-step breakdowns.

Tip Calculator

Calculate tips and split bills between multiple people with customizable tip percentages and rounding options.

Loan / Mortgage Calculator

Calculate monthly payments, total interest, and generate amortization schedules for loans and mortgages.

BMI Calculator

Calculate Body Mass Index from height and weight with category classification and healthy range guidance.

Discount / Sale Price Calculator

Calculate sale prices, savings amounts, and final costs after single or stacked percentage discounts.

Standard Deviation & Statistics Calculator

Compute mean, median, mode, standard deviation, variance, and other descriptive statistics from a data set.

Fraction / Decimal / Percentage Converter

Convert between fractions, decimals, and percentages instantly with simplification and step-by-step work.

Scientific Notation Converter

Convert numbers to and from scientific notation with precision control and engineering notation support.

Matrix Calculator

Perform matrix operations including addition, multiplication, determinant, inverse, transpose, and eigenvalues.

Age Calculator

Calculate exact age in years, months, days, and upcoming birthday countdowns from any date of birth.

Date Difference Calculator

Calculate the exact difference between two dates in years, months, weeks, days, and business days.

Compound Interest Calculator

Calculate compound interest growth over time with customizable principal, rate, frequency, and contributions.

GPA Calculator

Calculate weighted and unweighted GPA from course grades and credit hours with 4.0 and 5.0 scale support.

Quadratic Equation Solver

Solve quadratic equations using the quadratic formula with step-by-step solutions, discriminant analysis, and graphing.

Image File Size Estimator

Estimate image file sizes based on dimensions, color depth, format, and compression level before export.

DPI / PPI Calculator

Calculate dots per inch and pixels per inch from screen or print dimensions for optimal image resolution.

Geometry Shape Calculator

Calculate area, perimeter, and volume for common 2D and 3D shapes with interactive visual diagrams.

Weighted Average Calculator

Calculate weighted averages with customizable weights for grades, investment returns, inventory costs, or any data set.

Percentage Change Calculator

Calculate percentage increase or decrease between two values with step-by-step formula breakdown and reverse calculation.

Image Aspect Ratio Calculator

Calculate and convert image aspect ratios with dimension suggestions.

Print Size Calculator

Calculate maximum print size at various DPI from image pixel dimensions.

PDF Takeoff Tool

Perform quantity takeoffs from construction PDF drawings with area and length measurements.

Random Number Generator

Generate random numbers within a custom range with options for no repeats, multiple draws, and history.

Random Name Picker

Enter a list of names and randomly select one or more with animation and elimination-round modes.

Wheel Spinner / Prize Wheel

Customizable spinning wheel with editable segments, colors, and animated spin with a winner reveal.

Coin Flipper

Flip a virtual coin with 3D animation, sound effects, and a running tally of heads vs tails.

Dice Roller

Roll virtual dice with support for multiple dice, custom sides (d4-d100), modifiers, and roll history.

List Randomizer / Shuffler

Paste a list of items and shuffle them into a random order with animation and exportable results.

Random Team Generator

Split a list of names into balanced random teams with customizable group sizes and re-shuffle.

Yes or No Generator

Get a random yes or no answer with animated reveal and optional probability weighting.

Lottery Number Generator

Generate random lottery numbers for popular games like Powerball, Mega Millions, and EuroMillions.

Bingo Number Caller

Random bingo number caller with visual board tracking, call history, and auto-call mode with adjustable speed.

Math Equation Solver

Solve linear and polynomial equations with step-by-step solutions and graphical visualization.

Fraction Calculator

Add, subtract, multiply, and divide fractions with step-by-step simplification and mixed number support.

Scientific Calculator

Full-featured scientific calculator with trigonometric, logarithmic, exponential, and memory functions.

Graphing Calculator

Plot mathematical functions on a 2D coordinate plane with zoom, pan, and multiple function overlay support.

Calorie Calculator / TDEE

Estimate daily calorie needs based on age, weight, height, gender, and activity level using Mifflin-St Jeor.

Body Fat Percentage Calculator

Estimate body fat percentage using Navy method from waist, neck, hip, and height measurements.

Running Pace Calculator

Calculate running pace, finish time, or distance from any two of the three values with split tables.

Pregnancy Due Date Calculator

Estimate due date from last menstrual period or conception date with trimester timeline and milestones.

Weight Tracker

Log daily weight entries with trend line chart, goal tracking, and BMI calculation over time.

Macro Calculator

Calculate daily protein, carb, and fat macronutrient targets based on TDEE and fitness goal (cut, maintain, bulk).

Blood Alcohol Content Calculator

Estimate BAC from drinks consumed, body weight, gender, and time elapsed using the Widmark formula.

Number Pattern / Sequence Solver

Enter a number sequence and identify the pattern with next-value prediction and formula display.

Prime Number Checker & Generator

Check if a number is prime and generate prime numbers up to any limit with factorization display.

GCD / LCM Calculator

Calculate the greatest common divisor and least common multiple of two or more numbers with steps.

Ratio Calculator

Solve ratio problems including scaling, simplifying, and finding missing values in proportions.

Pythagorean Theorem Calculator

Calculate the missing side of a right triangle from two known sides with visual diagram.

Area & Perimeter Calculator

Calculate area and perimeter for rectangles, circles, triangles, and other shapes with visual diagrams.

Volume Calculator

Calculate volume for cubes, spheres, cylinders, cones, and other 3D shapes with formula display.

Probability Calculator

Calculate probabilities for coin flips, dice rolls, card draws, and custom events with combination support.

Permutation & Combination Calculator

Calculate permutations and combinations (nPr, nCr) with step-by-step factorial breakdown.

Standard Deviation Visualizer

Enter data points and see standard deviation, mean, and normal distribution curve with interactive visualization.

Binary Calculator

Perform addition, subtraction, multiplication, and division on binary numbers with step-by-step visualization.

Hexadecimal Calculator

Perform arithmetic operations on hexadecimal numbers with real-time decimal and binary conversion.

LCM & GCD Calculator

Calculate the Least Common Multiple and Greatest Common Divisor of two or more numbers with step-by-step factorization.

Fibonacci Sequence Generator

Generate Fibonacci sequences to any length with golden ratio visualization and spiral drawing on canvas.

Function Plotter

Plot mathematical functions with zoom, pan, and trace. Supports polynomial, trigonometric, exponential, and logarithmic functions with derivative overlay.

Parametric Curve Plotter

Plot parametric equations x(t) and y(t) with animated trace, adjustable parameter ranges, and multiple curve overlay.

Polar Graph Plotter

Graph polar equations r(theta) with animated sweep, fill regions, and common curve presets like roses, cardioids, and lemniscates.

Implicit Curve Plotter

Visualize implicit equations f(x,y)=0 using marching squares. Supports circles, conics, and arbitrary implicit relations.

3D Surface Plotter

Render 3D surface plots z=f(x,y) with WebGL. Rotate, zoom, and toggle wireframe, color maps, and contour projections.

Vector Field Plotter

Visualize 2D vector fields with arrow plots, streamlines, and magnitude coloring. Enter component functions F(x,y) and G(x,y).

Slope Field Visualizer

Draw slope fields for first-order ODEs dy/dx=f(x,y). Click to trace solution curves and compare with exact solutions.

Contour Map Plotter

Generate contour (level curve) maps for z=f(x,y) with adjustable levels, color fills, and gradient vectors.

Inequality Grapher

Graph systems of linear and nonlinear inequalities with shaded feasible regions. Identify vertices and bounded regions.

Piecewise Function Grapher

Define and plot piecewise functions with domain intervals. Shows open/closed endpoints, continuity checks, and limits.

Interactive Geometry Canvas

Construct geometric figures with points, lines, circles, and polygons. Measure angles, distances, and areas dynamically.

Triangle Solver & Visualizer

Solve triangles from any combination of sides and angles. Shows the triangle to scale with all computed values and area.

Circle Theorems Explorer

Interactive demonstrations of inscribed angles, tangent theorems, chord properties, and cyclic quadrilaterals with draggable points.

Conic Sections Explorer

Explore ellipses, parabolas, hyperbolas, and circles by adjusting parameters. Shows foci, directrix, eccentricity, and equations.

Geometric Transformations Playground

Apply translations, rotations, reflections, and dilations to shapes. Compose transformations and see matrix representations.

Tessellation Maker

Create regular, semi-regular, and custom tessellations. Explore symmetry groups and Escher-style tiling with drag-to-deform.

Pythagorean Theorem Visualizer

Drag a right triangle and watch area squares animate on each side. Includes algebraic and geometric proofs.

Coordinate Geometry Toolkit

Calculate midpoints, distances, slopes, line equations, and intersections on an interactive coordinate plane.

Polyhedra 3D Viewer

Explore Platonic and Archimedean solids in 3D. Rotate, unfold to nets, and verify Euler formula V-E+F=2.

Golden Ratio Explorer

Visualize the golden ratio in rectangles, spirals, pentagons, and Fibonacci sequences with interactive constructions.

Angle Measurement Tool

Measure and construct angles with a virtual protractor. Convert between degrees, radians, and gradians with visual arcs.

Shape Area & Perimeter Calculator

Calculate area and perimeter for 20+ shapes with visual diagrams. Includes circles, polygons, ellipses, and sectors.

3D Volume & Surface Area Calculator

Calculate volume and surface area for 15+ 3D shapes with interactive 3D previews. Spheres, cones, prisms, and more.

Symmetry Group Visualizer

Explore rotational and reflective symmetry groups. Draw a motif and see it replicated under dihedral and cyclic group operations.

Locus Tracer

Trace loci of points under geometric constraints. Explore ellipse, parabola, and cardioid generation through linkage mechanisms.

Trigonometric Function Explorer

Explore sin, cos, tan and their inverses with amplitude, period, phase shift, and vertical shift sliders. Shows transformations live.

Trig Identity Verifier

Enter two trigonometric expressions and verify identity by graphical comparison and numerical sampling across domains.

Law of Sines & Cosines Visualizer

Interactive triangle demonstrating the law of sines and cosines. Drag vertices and watch ratios and formulas update.

Fourier Series Visualizer

Build periodic waveforms from sine and cosine harmonics. Visualize square, sawtooth, and triangle wave approximations term by term.

Lissajous Curve Generator

Generate Lissajous figures by adjusting frequency ratios, phase differences, and damping. Animate the drawing process.

Hyperbolic Function Explorer

Visualize sinh, cosh, tanh and their inverses. Compare with circular trig functions and explore catenary curve applications.

Wave Interference Simulator

Simulate constructive and destructive interference of two waves. Adjust amplitude, frequency, and phase to see superposition.

Derivative Visualizer

See the derivative as a tangent line slope. Animate the tangent point and plot f(x) alongside f\

Integral Visualizer

Visualize definite integrals as area under curves. Compare Riemann sums (left, right, midpoint, trapezoidal) with n subdivisions.

Limit Explorer

Investigate limits visually by zooming into function behavior near a point. Shows left/right limits, holes, and asymptotes.

Taylor Series Explorer

Approximate functions with Taylor/Maclaurin polynomials. Add terms incrementally and see convergence radius visually.

Solid of Revolution Visualizer

Rotate curves around axes to generate 3D solids. Calculate volume using disk, washer, and shell methods with animations.

Differential Equation Solver

Solve and visualize first and second-order ODEs numerically. Supports Euler, RK4 methods with phase portraits.

Epsilon-Delta Proof Trainer

Practice epsilon-delta limit proofs interactively. Given epsilon, find delta that satisfies the definition with visual feedback.

Arc Length Calculator & Visualizer

Calculate and visualize arc length of curves with the integral formula. Supports Cartesian, parametric, and polar curves.

Series Convergence Tester

Test infinite series for convergence using ratio, root, comparison, integral, and alternating series tests with partial sum plots.

Multivariable Calculus Visualizer

Visualize partial derivatives, gradient vectors, and double integrals on 3D surfaces with interactive cross-sections.

Laplace Transform Calculator

Compute Laplace transforms and inverses for common functions. Visualize time-domain and s-domain representations side by side.

Optimization Visualizer

Find and visualize local/global maxima and minima of functions. Shows critical points, second derivative test, and constraint optimization.

Related Rates Simulator

Animate classic related rates problems: expanding balloon, sliding ladder, filling cone. See rates change in real time.

2D Vector Visualizer

Add, subtract, scale, and compute dot/cross products of 2D vectors visually. Shows projections and angle between vectors.

3D Vector Visualizer

Manipulate 3D vectors in a rotatable WebGL scene. Compute cross products, projections, and visualize planes and normal vectors.

Linear Transformation Visualizer

See how 2x2 matrices transform the plane. Drag basis vectors and watch the grid deform. Shows determinant, eigenvalues, and SVD.

Eigenvalue & Eigenvector Visualizer

Compute eigenvalues and eigenvectors of 2x2 and 3x3 matrices. Visualize eigenvectors as invariant directions under transformation.

Gaussian Elimination Step-by-Step

Solve systems of linear equations with animated row operations. Shows augmented matrix, pivot selection, and back substitution.

Matrix Decomposition Tool

Compute LU, QR, SVD, and Cholesky decompositions with step-by-step explanations and factor matrix visualization.

System of Equations Grapher

Graph systems of 2 or 3 linear equations and find intersection points visually. Shows parallel, coincident, and inconsistent cases.

Span & Subspace Visualizer

Visualize the span of vectors in 2D and 3D. Explore linear independence, basis, dimension, and column/null spaces.

Least Squares Regression Visualizer

Fit lines and polynomials to data points using least squares. Visualize residuals, R-squared, and the normal equation.

Gram-Schmidt Process Visualizer

Watch the Gram-Schmidt orthogonalization process step by step in 2D and 3D with animated projections.

Markov Chain Simulator

Define transition matrices and simulate Markov chains. Visualize state diagrams, steady-state distributions, and absorption probabilities.

Tensor Operations Calculator

Perform tensor products, contractions, and index manipulations on rank-2 and rank-3 tensors with visual component grids.

PageRank Simulator

Build a web graph and simulate the PageRank algorithm. Visualize iterations, damping factor effects, and rank convergence.

Probability Distribution Explorer

Visualize normal, binomial, Poisson, exponential, chi-squared, and 15+ distributions. Adjust parameters and see PDF/CDF update.

Normal Distribution Calculator

Calculate probabilities, z-scores, and percentiles for normal distributions. Visualize shaded areas under the bell curve.

Central Limit Theorem Demo

Sample from any distribution and watch sample means converge to normal. Adjust sample size and see the magic of CLT unfold.

Dice Probability Simulator

Roll customizable dice sets and visualize outcome distributions. Compare theoretical vs empirical probabilities with bar charts.

Monte Carlo Estimator

Estimate pi, integrals, and probabilities using Monte Carlo simulation. Watch random points accumulate and convergence improve.

Bayesian Probability Calculator

Calculate posterior probabilities with Bayes theorem. Visualize prior, likelihood, and posterior with tree diagrams and area plots.

Hypothesis Test Visualizer

Perform z-tests, t-tests, and chi-squared tests with visual rejection regions, p-values, and power curves.

Confidence Interval Builder

Construct confidence intervals for means and proportions. Visualize how sample size and confidence level affect interval width.

Random Walk Simulator

Simulate 1D and 2D random walks with step visualization. Explore diffusion, return probability, and Brownian motion concepts.

Combinatorics Calculator

Calculate permutations, combinations, factorials, and multinomial coefficients with visual counting diagrams and Pascal triangle.

ANOVA Calculator & Visualizer

Perform one-way and two-way ANOVA with F-test visualization. Shows group means, within/between variance, and post-hoc tests.

Birthday Paradox Simulator

Simulate the birthday problem for groups of various sizes. Compare theoretical probability with empirical results across trials.

Monty Hall Problem Simulator

Play the Monty Hall game and run thousands of simulations. Visualize why switching doors wins 2/3 of the time.

Sampling Distribution Explorer

Draw samples from populations and build sampling distributions for means, proportions, and variances with live animation.

Prime Number Sieve Visualizer

Watch the Sieve of Eratosthenes eliminate composites in real time. Explore prime gaps, twin primes, and prime density.

Prime Factorization Tree

Build animated factor trees for any integer. Shows unique prime factorization, GCD, LCM, and divisor count.

Modular Arithmetic Calculator

Compute modular addition, multiplication, exponentiation, and inverses. Visualize on clock-face number circles.

Fibonacci Sequence Explorer

Generate Fibonacci numbers with spiral visualization. Explore Lucas numbers, golden ratio convergence, and Zeckendorf representations.

Graph Theory Playground

Build graphs with nodes and edges. Run BFS, DFS, Dijkstra, and detect Eulerian/Hamiltonian paths with step-by-step animation.

Logic Gate Simulator

Build digital circuits with AND, OR, NOT, NAND, NOR, XOR gates. Wire inputs to outputs and generate truth tables automatically.

Boolean Algebra Simplifier

Simplify Boolean expressions using laws and Karnaugh maps. Visualize with circuit diagrams and generate minimized forms.

Binary Tree Visualizer

Insert, delete, and search in BST, AVL, and red-black trees with animated rotations and traversal order highlighting.

Sorting Algorithm Visualizer

Watch bubble, merge, quick, heap, and radix sort animate step by step. Compare speed and swap counts side by side.

Recurrence Relation Solver

Solve linear recurrence relations with characteristic equations. Visualize sequences and compare closed-form solutions.

Euclidean Algorithm Visualizer

Find GCD using the Euclidean algorithm with visual rectangle decomposition. Shows extended GCD and Bezout coefficients.

pascals-triangle-explorer

Interactive Pascal triangle with pattern highlighting: Fibonacci diagonals, powers of 2, Sierpinski coloring, and binomial coefficients.

Complex Number Visualizer

Plot complex numbers on the Argand plane. Perform arithmetic, convert between rectangular and polar, and visualize operations geometrically.

Complex Function Domain Coloring

Visualize complex functions using domain coloring. Explore poles, zeros, branch cuts, and conformal mappings interactively.

Mandelbrot Set Explorer

Explore the Mandelbrot fractal with unlimited zoom using WebGL. Adjust iterations, color maps, and compute Julia sets for any point.

Fractal Generator

Generate Koch snowflake, Sierpinski triangle, dragon curve, and custom IFS fractals with adjustable iteration depth and coloring.

Roots of Unity Visualizer

Plot nth roots of unity on the unit circle. Explore cyclic group structure, primitive roots, and discrete Fourier transform connections.

Group Cayley Table Generator

Generate and explore Cayley tables for common groups (Z_n, S_n, D_n). Verify group axioms and find subgroups visually.

Chaos Game Visualizer

Play the chaos game with polygons and ratio rules. Watch Sierpinski triangle, fern, and custom attractors emerge from random iterations.

Lorenz Attractor Simulator

Simulate the Lorenz system in 3D. Adjust sigma, rho, beta parameters and watch butterfly-shaped trajectories evolve.

Cellular Automata Simulator

Run 1D elementary automata (all 256 rules) and 2D Conway Game of Life. Draw patterns, step through, or run continuously.

Strange Attractor Gallery

Render Rossler, Henon, Duffing, and other strange attractors. Adjust parameters and watch phase portraits morph in real time.

L-System Fractal Generator

Define L-system grammars and generate fractal plants, trees, and curves. Edit axiom, rules, and angle with live rendering.

Projectile Motion Simulator

Launch projectiles with adjustable angle, velocity, and gravity. Trace trajectories, show max height, range, and air resistance effects.

Pendulum Simulator

Simulate simple and double pendulums with adjustable length, mass, and damping. Shows phase space plots and chaotic motion.

Spring-Mass System Simulator

Simulate spring-mass systems with damping and driving forces. Visualize displacement, velocity, and energy over time. Explore resonance.

Orbital Mechanics Simulator

Simulate planetary orbits with adjustable mass, velocity, and eccentricity. Visualize Kepler laws, transfer orbits, and escape velocity.

Electric Field Visualizer

Place point charges and visualize electric field lines, equipotential curves, and field strength with interactive charge dragging.

DC Circuit Simulator

Build circuits with resistors, batteries, and switches. Calculate current, voltage, and power using Kirchhoff laws with animated electron flow.

Optics Ray Tracer

Simulate light rays through lenses, mirrors, and prisms. Trace reflections, refractions, and show image formation with thin lens equation.

Wave Equation Simulator

Simulate 1D and 2D wave equations with pluck, strike, and boundary condition controls. Visualize standing waves and resonant modes.

Thermodynamics PV Diagram

Draw isothermal, adiabatic, isobaric, and isochoric processes on PV diagrams. Calculate work, heat, and efficiency for cycles.

Free Body Diagram Builder

Draw objects and add force vectors (gravity, normal, tension, friction). Resolve components and check equilibrium conditions.

Collision Simulator

Simulate elastic and inelastic 1D and 2D collisions. Adjust masses and velocities, track momentum and kinetic energy conservation.

Electromagnetic Wave Visualizer

Visualize E and B fields of an EM wave in 3D. Adjust frequency, wavelength, and polarization. Explore the EM spectrum.

Fluid Dynamics Simulator

Simulate 2D fluid flow around obstacles using lattice Boltzmann. Visualize streamlines, vortices, and Reynolds number effects.

N-Body Gravity Simulator

Simulate gravitational interactions between N bodies. Create solar systems, binary stars, and galaxy-scale simulations with trail rendering.

Special Relativity Visualizer

Visualize time dilation, length contraction, and Lorentz transformations. Explore spacetime diagrams and the twin paradox interactively.

Inclined Plane Simulator

Simulate objects on inclined planes with friction. Decompose forces, calculate acceleration, and animate motion up and down slopes.

Standing Wave Mode Visualizer

Explore standing wave harmonics on strings and in pipes. Adjust tension, density, and boundary conditions. Hear frequency audio output.

Doppler Effect Simulator

Visualize wavefronts from moving sources. Adjust source speed and see frequency shift, Mach cones, and sonic booms.

Heat Conduction Simulator

Simulate heat conduction through 1D rods and 2D plates. Set boundary temperatures and watch temperature distribution evolve in real time.

Magnetic Field Visualizer

Visualize magnetic fields from wires, loops, and solenoids. Plot field lines and magnitude using Biot-Savart law computations.

Molecular Weight Calculator

Enter a chemical formula and calculate molecular weight, elemental composition percentages, and molar mass with visual pie chart.

Chemical Equation Balancer

Balance chemical equations automatically with step-by-step matrix method. Supports redox half-reactions and combustion.

Stoichiometry Calculator

Calculate reactant and product masses from balanced equations. Identify limiting reagents and theoretical yields with visual ratios.

pH Calculator & Visualizer

Calculate pH, pOH, and hydrogen ion concentration. Visualize the pH scale with color indicators and buffer capacity curves.

Ideal Gas Law Simulator

Simulate PV=nRT with animated gas particles. Adjust pressure, volume, temperature, and moles to see real-time changes.

Electron Configuration Builder

Build electron configurations by filling orbitals interactively. Shows aufbau principle, orbital diagrams, and quantum numbers.

Molarity & Dilution Calculator

Calculate molarity, dilution volumes (M1V1=M2V2), and solution preparation. Visual beaker animations show dilution steps.

Lewis Structure Drawer

Draw Lewis dot structures for molecules. Automatically count valence electrons, assign formal charges, and show resonance structures.

Titration Curve Simulator

Simulate acid-base titrations with real-time pH curve plotting. Identify equivalence points, buffers, and indicator color changes.

Oxidation State Calculator

Determine oxidation states for atoms in compounds and ions. Identify redox changes and balance half-reactions visually.

DNA Transcription & Translation Simulator

Simulate DNA to mRNA transcription and mRNA to protein translation. Visualize codons, amino acids, and the central dogma step by step.

Punnett Square Generator

Create mono- and dihybrid Punnett squares. Calculate genotype and phenotype ratios with interactive allele selection.

Population Growth Simulator

Model exponential and logistic population growth. Adjust birth rate, death rate, and carrying capacity with animated population curves.

Hardy-Weinberg Equilibrium Calculator

Calculate allele and genotype frequencies under Hardy-Weinberg equilibrium. Test populations for evolutionary forces.

Enzyme Kinetics Simulator

Simulate Michaelis-Menten kinetics with Lineweaver-Burk plots. Explore competitive, uncompetitive, and noncompetitive inhibition.

Predator-Prey Simulator

Simulate Lotka-Volterra predator-prey dynamics. Visualize population cycles, phase portraits, and equilibrium stability.

Interactive Star Chart

View constellations and stars for any location and date. Identify stars by magnitude, filter by constellation, and learn mythology.

Solar System Orrery

Animated scale model of the solar system with accurate orbital periods. Show planet positions for any date and track conjunctions.

Moon Phase Calculator

Calculate and visualize moon phases for any date. Shows illumination percentage, rise/set times, and lunar calendar.

Hertzsprung-Russell Diagram Explorer

Plot stars on an H-R diagram by luminosity and temperature. Explore stellar classification, main sequence, giants, and white dwarfs.

Telescope Field of View Calculator

Calculate true and apparent field of view for telescope-eyepiece combinations. Shows magnification, exit pupil, and limiting magnitude.

Redshift & Distance Calculator

Calculate cosmological distances from redshift using Hubble law. Explore lookback time and the expanding universe.

Resistor Color Code Calculator

Decode 4, 5, and 6-band resistor color codes. Click color bands to calculate resistance value and tolerance with visual preview.

ohms-law-calculator

Calculate voltage, current, resistance, and power from any two known values. Visual circuit diagram updates with computed values.

RC/RL Circuit Transient Simulator

Simulate charging and discharging of RC and RL circuits. Visualize voltage and current waveforms with time constant analysis.

AC Circuit Phasor Diagram

Build RLC circuits and visualize phasors for voltage and current. Shows impedance, phase angle, and resonance frequency.

Bode Plot Generator

Generate Bode magnitude and phase plots from transfer functions. Identify gain margin, phase margin, and stability.

Signal Generator & Visualizer

Generate sine, square, triangle, and sawtooth waveforms. Mix signals, apply AM/FM modulation, and view time/frequency domains.

FFT Spectrum Analyzer

Compute Fast Fourier Transforms of signals. Visualize frequency spectrum, apply windowing functions, and identify dominant frequencies.

Digital Filter Designer

Design FIR and IIR filters interactively. Adjust cutoff frequency, order, and type. View magnitude response and pole-zero plots.

Beam Bending Calculator

Calculate and visualize shear force and bending moment diagrams for loaded beams. Supports point, distributed, and moment loads.

Stress-Strain Curve Explorer

Explore stress-strain curves for different materials. Identify yield point, ultimate strength, and fracture with interactive annotations.

Truss Structure Analyzer

Build 2D trusses with joints and members. Solve for member forces using method of joints with color-coded tension/compression.

Gear Ratio Calculator

Calculate gear ratios for gear trains and planetary systems. Visualize meshing gears with animated rotation at correct speed ratios.

mohr-circle-calculator

Compute and visualize principal stresses, maximum shear, and stress transformations using interactive Mohr circle construction.

Cam Profile Designer

Design cam profiles with follower displacement diagrams. Choose dwell-rise-dwell sequences and generate displacement, velocity, acceleration curves.

Four-Bar Linkage Simulator

Simulate four-bar linkage mechanisms with adjustable link lengths. Trace coupler curves and classify Grashof type.

Game Theory Payoff Matrix

Define 2-player games with payoff matrices. Find Nash equilibria, dominant strategies, and mixed strategy solutions visually.

prisoners-dilemma-simulator

Play iterated prisoner dilemma against strategies (tit-for-tat, always defect, random). Tournament mode compares all strategies.

Voting Method Simulator

Compare plurality, ranked-choice, Borda count, Condorcet, and approval voting. See how different methods produce different winners.

Linear Programming Solver

Solve 2-variable LP problems graphically. Define constraints, plot feasible region, and find optimal vertex with objective function slider.

Auction Theory Simulator

Simulate English, Dutch, sealed-bid, and Vickrey auctions with multiple bidders. Explore revenue equivalence and winner curse.

Fair Division Calculator

Solve fair division problems using cut-and-choose, adjusted winner, and Knaster methods. Visualize allocations and envy-freeness.

Utility Function Explorer

Visualize utility functions and indifference curves. Explore marginal utility, budget constraints, and optimal bundles in 2D.

Time Value of Money Calculator

Calculate present value, future value, annuities, and perpetuities with visual timeline diagrams of cash flows.

Bond Pricing Calculator

Calculate bond prices, yield to maturity, duration, and convexity. Visualize price-yield curves and coupon cash flows.

Options Pricing (Black-Scholes)

Price European options using Black-Scholes model. Visualize Greeks (delta, gamma, theta, vega) and payoff diagrams.

Amortization Schedule Visualizer

Generate loan amortization schedules with stacked area charts showing principal vs interest breakdown over the loan lifetime.

Depreciation Calculator

Calculate straight-line, declining balance, sum-of-years, and MACRS depreciation. Chart book value over asset life.

Life Table Calculator

Build actuarial life tables from mortality data. Calculate life expectancy, survival probabilities, and force of mortality curves.

NPV & IRR Calculator

Calculate net present value and internal rate of return for investment cash flows. Compare projects on timeline diagrams.

Retirement Savings Planner

Model retirement savings with Monte Carlo simulations of market returns. Visualize probability of achieving target nest egg.

Caesar Cipher Visualizer

Encrypt and decrypt with Caesar cipher. Animated rotating alphabet wheels and frequency analysis for cryptanalysis.

RSA Algorithm Visualizer

Step through RSA key generation, encryption, and decryption with small primes. Shows modular exponentiation and Euler totient.

Diffie-Hellman Key Exchange Visualizer

Simulate the Diffie-Hellman protocol with color-mixing analogy. Shows how shared secrets emerge from public exchanges.

Substitution Cipher Solver

Decode substitution ciphers using frequency analysis. Interactive letter mapping with bigram/trigram hints and English pattern matching.

Hash Function Visualizer

Visualize how hash functions map inputs to fixed-length outputs. Explore avalanche effect, collision resistance, and birthday attack probability.

Neural Network Visualizer

Build feedforward neural networks layer by layer. Train on simple datasets and watch weights, activations, and loss converge in real time.

Gradient Descent Visualizer

Visualize gradient descent on 2D loss surfaces. Compare SGD, momentum, Adam optimizers. Watch convergence paths and learning rate effects.

K-Means Clustering Visualizer

Watch K-means clustering step through centroid assignment and update. Adjust K, compare with random initialization, and visualize Voronoi cells.

Perceptron Learning Visualizer

Train a single perceptron on 2D data. Watch the decision boundary move as weights update with each training sample.

Activation Function Explorer

Compare ReLU, sigmoid, tanh, softmax, and other activation functions. See graphs, derivatives, and output ranges side by side.

Confusion Matrix Analyzer

Build confusion matrices and compute precision, recall, F1-score, accuracy, and ROC curves with interactive threshold adjustment.

PCA Dimensionality Reduction Visualizer

Perform Principal Component Analysis on 2D/3D data. Visualize eigenvectors, variance explained, and projected data.

PID Controller Tuner

Tune PID controller gains interactively. Visualize step response, overshoot, settling time, and steady-state error in real time.

Nyquist Plot Generator

Generate Nyquist plots from transfer functions. Analyze encirclements of the critical point for stability assessment.

Root Locus Plotter

Plot root locus for control systems. Adjust gain and see pole migration. Identify breakaway points and stability boundaries.

Convolution Visualizer

Visualize continuous and discrete convolution step by step. Slide the flipped kernel across the signal and see the output build.

Z-Transform Calculator

Compute Z-transforms and inverses for discrete-time sequences. Plot pole-zero diagrams and regions of convergence.

Number Line Visualizer

Interactive number line for integers, fractions, decimals, and irrationals. Plot intervals, inequalities, and absolute values.

Clock Angle Calculator

Calculate the angle between clock hands at any time. Animated clock face shows acute and reflex angles with degree/radian values.

Graph Coloring Tool

Color graphs with minimum colors (chromatic number). Build graphs and try to color them or let the algorithm find optimal coloring.

Traveling Salesman Visualizer

Place cities and watch nearest-neighbor, greedy, and simulated annealing algorithms find short tours. Compare path lengths.

Pathfinding Algorithm Visualizer

Watch A*, Dijkstra, and BFS find shortest paths on grids. Draw walls, add weights, and compare algorithm exploration patterns.

Supply & Demand Curve Simulator

Shift supply and demand curves and see equilibrium price and quantity adjust. Explore elasticity, surplus, and price controls.

Dimensional Analysis Tool

Chain unit conversion factors to solve dimensional analysis problems. Visual factor-label method with cancelation highlighting.

Significant Figures Calculator

Count significant figures and perform arithmetic with proper sig-fig rules. Color-codes significant vs non-significant digits.

Error Propagation Calculator

Calculate uncertainty propagation through mathematical operations. Supports addition, multiplication, and arbitrary function formulas.

Phase Portrait Plotter

Plot phase portraits for 2D autonomous systems. Classify equilibria as nodes, spirals, saddles, and centers with trajectory animation.

Finance & Business (492)

Profit Margin Calculator

Calculate gross, operating, and net profit margins from cost and revenue with breakeven analysis.

Salary to Hourly Converter

Convert between annual salary and hourly rate with adjustments for work hours, overtime, and benefits.

Sales Tax Calculator

Calculate sales tax amounts, tax-inclusive and tax-exclusive prices for any tax rate or jurisdiction.

ROI Calculator

Calculate return on investment from initial cost and final value with annualized ROI and comparison tables.

Markup vs Margin Calculator

Convert between markup and margin percentages, calculate selling price, and compare pricing strategies.

Invoice Amount to Words Converter

Convert numeric amounts to written words for invoices, checks, and legal documents in multiple currencies.

Business Days Calculator

Calculate the number of business days between dates or find a future date excluding weekends and holidays.

Paycheck / Take-Home Pay Estimator

Estimate net take-home pay after federal and state taxes, Social Security, Medicare, and deductions.

Ad Revenue Calculator

Estimate advertising revenue from impressions, CPM, CPC, and conversion rates across ad networks.

Website Cost Calculator

Estimate website development and maintenance costs based on features, complexity, and hosting requirements.

Break-Even Calculator

Calculate the break-even point in units and revenue with fixed costs, variable costs, and pricing analysis.

CAGR Calculator

Calculate compound annual growth rate from beginning and ending values over a specified time period.

Product Photography Cost Calculator

Estimate product photography costs based on shot count, complexity, retouching, and studio requirements.

Print Cost Estimator

Estimate printing costs per page based on paper size, color mode, quantity, and finishing options.

eCommerce Product Image Size Reference

Reference guide for product image size requirements across Amazon, Shopify, eBay, Etsy, and other platforms.

Auto Loan Calculator

Calculate monthly car payments, total cost of financing, and compare loan terms with trade-in and down payment adjustments.

Personal Loan Calculator

Estimate monthly payments and total interest for personal loans with APR comparison and early payoff scenarios.

Student Loan Calculator

Calculate student loan repayment schedules across standard, graduated, income-driven, and extended plans with forgiveness timelines.

Student Loan Refinance Calculator

Compare current student loan terms against refinancing options to see potential savings in monthly payments and total interest.

Home Affordability Calculator

Determine how much house you can afford based on income, debts, down payment, interest rate, and DTI ratio limits.

Rent vs Buy Calculator

Compare the long-term financial impact of renting versus buying a home with appreciation, tax benefits, and opportunity cost analysis.

Refinance Calculator

Calculate break-even point and total savings from refinancing your mortgage with closing costs, new rate, and remaining term comparison.

Down Payment Calculator

Calculate required down payment amounts for different LTV ratios and see how down payment size affects monthly payments and PMI.

Closing Cost Calculator

Estimate home buying closing costs including origination fees, title insurance, appraisal, escrow, and prepaid items by state.

Home Equity Calculator

Calculate your available home equity, estimate HELOC borrowing limits, and model equity growth over time with appreciation.

Amortization Schedule Generator

Generate detailed amortization tables showing principal, interest, and balance for each payment period with extra payment modeling.

Extra Mortgage Payment Calculator

See how extra monthly, yearly, or one-time payments reduce total interest and shorten your mortgage payoff timeline.

Savings Calculator

Project savings account growth over time with initial deposit, recurring contributions, interest rate, and compounding frequency.

Savings Goal Calculator

Calculate how much to save monthly to reach a financial goal by a target date with interest and contribution adjustments.

Retirement Calculator

Estimate retirement savings needed based on current age, income, savings rate, expected returns, and desired retirement lifestyle.

401(k) Calculator

Project 401(k) balance at retirement with employer match, contribution limits, catch-up contributions, and Roth vs traditional comparison.

Roth IRA Calculator

Calculate Roth IRA growth projections with annual contribution limits, catch-up amounts, and tax-free withdrawal modeling.

Roth Conversion Calculator

Analyze the tax impact and long-term benefit of converting traditional IRA or 401(k) funds to a Roth IRA across multiple scenarios.

Traditional IRA Calculator

Project traditional IRA growth with tax-deductible contributions, required minimum distributions, and withdrawal tax impact analysis.

Social Security Benefits Estimator

Estimate Social Security retirement benefits based on earnings history, claiming age, and spousal benefit strategies.

Required Minimum Distribution (RMD) Calculator

Calculate required minimum distributions from retirement accounts based on account balance, age, and IRS life expectancy tables.

Retirement Withdrawal Calculator

Model sustainable withdrawal rates from retirement portfolios using the 4% rule, dynamic spending, and Monte Carlo simulations.

FIRE Calculator (Financial Independence)

Calculate your financial independence number, time to FIRE, and required savings rate with lean, regular, and fat FIRE scenarios.

Investment Return Calculator

Calculate total and annualized investment returns with dividends reinvested, fees deducted, and inflation-adjusted real returns.

Stock Profit/Loss Calculator

Calculate stock trading gains or losses with buy/sell prices, share quantity, commissions, and short vs long-term capital gains tax.

Dividend Yield Calculator

Calculate dividend yield, annual income, and dividend growth projections from share price, payout, and reinvestment assumptions.

DRIP Calculator (Dividend Reinvestment)

Model long-term portfolio growth with automatic dividend reinvestment, share accumulation, and compounding yield projections.

P/E Ratio Calculator

Calculate price-to-earnings ratio, forward P/E, PEG ratio, and compare stock valuations against industry benchmarks.

Stock Average Calculator

Calculate average cost basis from multiple stock purchases with total shares, weighted average price, and break-even analysis.

Options Profit Calculator

Calculate options trading profit/loss for calls and puts with strike price, premium, breakeven, and payoff diagrams.

Bond Yield Calculator

Calculate current yield, yield to maturity, and yield to call for bonds with coupon rate, face value, and market price inputs.

Bond Price Calculator

Calculate bond prices from yield, coupon rate, face value, and maturity with duration and convexity analysis.

Capital Gains Tax Calculator

Estimate capital gains taxes on investments with short-term vs long-term rates, cost basis methods, and tax bracket analysis.

Dollar-Cost Averaging Calculator

Compare lump-sum investing versus dollar-cost averaging with periodic investment modeling and historical return scenarios.

Asset Allocation Calculator

Design and rebalance investment portfolios across stocks, bonds, and alternatives based on risk tolerance, age, and goals.

Portfolio Rebalancing Calculator

Calculate exact buy/sell amounts needed to rebalance your portfolio to target allocation percentages across multiple holdings.

Expense Ratio Impact Calculator

Visualize how fund expense ratios erode investment returns over time and compare low-cost versus high-cost fund performance.

Net Worth Calculator

Calculate total net worth by listing assets and liabilities with category breakdowns and net worth over time tracking.

Debt Payoff Calculator

Create debt payoff plans using snowball or avalanche methods with timeline visualization, interest savings, and extra payment modeling.

Debt Consolidation Calculator

Compare current multiple debt payments against a single consolidated loan to see monthly savings and total interest reduction.

Debt-to-Income Ratio Calculator

Calculate your DTI ratio with monthly debt obligations and gross income to assess mortgage qualification and lending eligibility.

Credit Card Payoff Calculator

Calculate time and total interest to pay off credit card balances with minimum payments, fixed payments, or target payoff dates.

Credit Card Minimum Payment Calculator

See how minimum payments extend payoff time and increase total interest paid versus accelerated payment strategies.

Budget Planner (50/30/20)

Create a personal budget using the 50/30/20 rule or custom categories with income allocation, expense tracking, and surplus analysis.

Expense Tracker

Track daily expenses by category with running totals, spending charts, budget comparison, and CSV export for record keeping.

Emergency Fund Calculator

Calculate your ideal emergency fund size based on monthly expenses, income stability, dependents, and savings timeline to goal.

Income Tax Calculator

Estimate federal income tax liability with tax brackets, standard/itemized deductions, credits, and effective tax rate calculation.

Tax Bracket Calculator

Determine your marginal and effective tax rates across federal income tax brackets with filing status comparison.

Self-Employment Tax Calculator

Calculate self-employment tax (Social Security + Medicare) for freelancers with Schedule SE estimation and quarterly payment planning.

Quarterly Estimated Tax Calculator

Calculate quarterly estimated tax payments for self-employed and freelancers with safe harbor thresholds and penalty avoidance.

W-4 Withholding Calculator

Optimize W-4 federal tax withholding to minimize refund or balance owed with multiple jobs, dependents, and deduction adjustments.

1099 Tax Calculator

Estimate total tax liability for 1099 independent contractor income including federal, state, self-employment, and deductions.

VAT Calculator

Calculate VAT-inclusive and VAT-exclusive prices with configurable rates for EU, UK, and international VAT jurisdictions.

GST Calculator

Calculate Goods and Services Tax amounts with inclusive/exclusive pricing for Australia, India, Canada, and other GST countries.

Property Tax Calculator

Estimate annual property taxes from assessed value and local mill rates with homestead exemptions and appeal savings analysis.

Payroll Calculator

Calculate gross-to-net payroll with federal/state withholding, FICA, pre-tax deductions, and employer cost breakdowns.

Overtime Calculator

Calculate overtime pay at 1.5x and 2x rates with regular hours, overtime hours, and weekly/biweekly/monthly gross pay summaries.

Salary Comparison Calculator

Compare job offers by adjusting for cost of living, taxes, benefits, commute costs, and purchasing power across different cities.

Pay Raise Calculator

Calculate the impact of a salary raise on your paycheck including new annual salary, monthly/biweekly increase, and tax-adjusted take-home.

Freelance Rate Calculator

Calculate your ideal freelance hourly or project rate based on desired salary, expenses, taxes, billable hours, and profit margin.

Cost of Living Calculator

Compare cost of living between cities with housing, groceries, transportation, healthcare, and utilities adjustments for salary equivalency.

Inflation Calculator

Calculate the purchasing power impact of inflation over time showing how prices change and the real value of money across years.

Currency Converter

Convert between world currencies with live exchange rate inputs, historical rate comparison, and multi-currency conversion tables.

Cryptocurrency Converter

Convert between cryptocurrencies and fiat currencies with custom price inputs, portfolio value calculation, and gain/loss tracking.

Crypto Profit/Loss Calculator

Calculate cryptocurrency trading gains and losses with buy/sell prices, fees, and portfolio performance across multiple transactions.

Crypto Mining Profitability Calculator

Estimate mining profitability with hash rate, power consumption, electricity cost, pool fees, and difficulty adjustments.

Crypto Staking Rewards Calculator

Calculate staking rewards and APY for proof-of-stake cryptocurrencies with compounding, validator fees, and lockup period modeling.

Invoice Generator

Create professional invoices with company logo, line items, taxes, discounts, payment terms, and print-ready PDF output.

Receipt Maker

Generate itemized receipts with business details, line items, tax calculation, payment method, and printable receipt format.

Quote / Estimate Generator

Create professional price quotes and estimates with itemized services, validity periods, terms, and client-ready formatting.

Purchase Order Generator

Generate purchase orders with vendor details, item descriptions, quantities, prices, shipping terms, and approval signatures.

Packing Slip Generator

Create packing slips for shipments with order details, item lists, quantities, weights, and carrier tracking information.

Profit & Loss Statement Builder

Build income statements with revenue, COGS, operating expenses, and net income calculations in standard P&L format.

Balance Sheet Builder

Create balance sheets with assets, liabilities, and equity sections following standard accounting format with auto-balancing checks.

Cash Flow Statement Builder

Build cash flow statements with operating, investing, and financing activities sections using direct or indirect method.

NPV Calculator (Net Present Value)

Calculate net present value of future cash flows with customizable discount rate, investment period, and sensitivity analysis.

IRR Calculator (Internal Rate of Return)

Calculate internal rate of return for investment projects with irregular cash flows, MIRR comparison, and NPV profile charting.

Time Value of Money Calculator

Solve for any TVM variable - present value, future value, payment, rate, or periods - with annuity due and ordinary annuity modes.

Present Value Calculator

Calculate the present value of a future sum or annuity stream with discount rate and compounding frequency adjustments.

Future Value Calculator

Calculate the future value of current investments or regular deposits with compound interest and varying contribution schedules.

Depreciation Calculator

Calculate asset depreciation using straight-line, declining balance, sum-of-years-digits, and MACRS methods with full schedules.

Working Capital Calculator

Calculate working capital and current ratio from current assets and liabilities with trend analysis and benchmark comparisons.

Lease vs Buy Calculator

Compare total cost of leasing versus buying equipment or vehicles with residual value, tax benefits, and cash flow impact analysis.

Car Lease Calculator

Calculate monthly car lease payments with MSRP, residual value, money factor, taxes, and drive-off costs breakdown.

Business Valuation Calculator

Estimate business value using multiple methods: discounted cash flow, revenue multiples, EBITDA multiples, and asset-based approaches.

Burn Rate Calculator

Calculate startup burn rate and runway in months from monthly expenses, revenue, and available cash with scenario modeling.

Startup Runway Calculator

Estimate months of runway remaining with current cash, monthly burn rate, revenue growth, and funding round planning scenarios.

CAC / LTV Calculator

Calculate customer acquisition cost, lifetime value, and LTV:CAC ratio with cohort analysis and payback period estimation.

Unit Economics Calculator

Analyze per-unit profitability with revenue, COGS, contribution margin, and scale projections for SaaS and product businesses.

SaaS Metrics Calculator

Calculate MRR, ARR, churn rate, expansion revenue, LTV, CAC payback, and quick ratio from subscription business inputs.

MRR / ARR Calculator

Calculate monthly and annual recurring revenue with new, expansion, contraction, and churned MRR components and growth trends.

Churn Rate Calculator

Calculate customer and revenue churn rates with retention curves, cohort analysis, and impact on recurring revenue projections.

Pricing Strategy Calculator

Model pricing strategies with cost-plus, value-based, and competitive pricing analysis including elasticity and revenue optimization.

Subscription Pricing Calculator

Design subscription tiers with feature matrices, annual vs monthly pricing, and revenue projection across plan mix scenarios.

EBITDA Calculator

Calculate EBITDA and adjusted EBITDA from income statement inputs with margin analysis and industry benchmark comparison.

Financial Ratio Calculator

Calculate key financial ratios - liquidity, profitability, efficiency, leverage, and valuation - from balance sheet and income statement data.

DSCR Calculator (Debt Service Coverage)

Calculate debt service coverage ratio from net operating income and total debt service for loan qualification and analysis.

Cap Rate Calculator

Calculate capitalization rate for real estate investments from net operating income and property value with comparison analysis.

Rental Property Calculator

Analyze rental property investments with cash flow, cap rate, cash-on-cash return, ROI, and mortgage payment calculations.

Rental Yield Calculator

Calculate gross and net rental yield from property value, annual rent, and operating expenses for real estate investment comparison.

Real Estate Commission Calculator

Calculate real estate agent commissions with split percentages, net proceeds to seller, and closing cost estimates.

House Flip Profit Calculator

Estimate house flip profits with purchase price, renovation costs, holding costs, selling costs, and after-repair value projections.

Compound Interest Visualizer

Interactive chart showing compound interest growth with adjustable principal, rate, and time sliders for visual learning and comparison.

Rule of 72 Calculator

Calculate how long it takes to double your money at various interest rates using the Rule of 72, 69.3, and exact formulas.

Simple Interest Calculator

Calculate simple interest on loans or investments with principal, rate, and time inputs showing total interest and final amount.

APR Calculator

Calculate annual percentage rate from loan terms, fees, and points to compare true borrowing costs across different loan offers.

Interest Rate Calculator

Solve for the interest rate needed to grow an investment to a target value over a specified time period with compounding options.

CD Calculator (Certificate of Deposit)

Calculate CD maturity values, interest earned, and APY with term comparison and CD laddering strategy analysis.

Annuity Calculator

Calculate annuity payments, present value, and future value for fixed, variable, and indexed annuities with payout projections.

Pension Calculator

Estimate pension benefits based on years of service, final average salary, and benefit formula with lump-sum versus annuity comparison.

529 College Savings Calculator

Project 529 education savings growth with contribution limits, tax benefits, expected returns, and future college cost estimation.

College Cost Calculator

Estimate total college costs including tuition, room and board, books, and fees with inflation projections and financial aid gaps.

Wedding Budget Calculator

Plan wedding expenses across venue, catering, photography, flowers, and more with per-guest cost analysis and budget tracking.

Baby Cost Calculator

Estimate first-year and multi-year costs of having a baby including healthcare, childcare, diapers, formula, and gear expenses.

Moving Cost Calculator

Estimate moving costs based on distance, home size, packing services, insurance, and special items with local vs long-distance comparison.

Life Insurance Needs Calculator

Calculate recommended life insurance coverage based on income replacement, debts, future expenses, and existing coverage gaps.

Health Insurance Cost Comparison

Compare health insurance plans by premium, deductible, copay, coinsurance, and out-of-pocket max with total cost modeling by usage level.

HSA Calculator

Model Health Savings Account growth with contribution limits, employer contributions, tax savings, investment returns, and qualified expenses.

True Cost of Car Ownership Calculator

Calculate total car ownership costs including loan payments, insurance, fuel, maintenance, depreciation, and registration over time.

Gas / Fuel Cost Calculator

Calculate fuel costs for trips based on distance, fuel efficiency, and gas price with route comparison and annual fuel budget estimates.

EV vs Gas Car Savings Calculator

Compare total ownership costs of electric versus gas vehicles including purchase price, fuel/charging, maintenance, and tax credits.

Solar Panel ROI Calculator

Calculate solar panel system payback period, energy savings, tax credits, and 25-year ROI based on system size and electricity rates.

Electricity Cost Calculator

Calculate electricity costs for appliances and devices based on wattage, usage hours, and local electricity rates with monthly and annual totals.

Trading Margin Calculator

Calculate margin requirements, leverage ratios, and margin call levels for stock, futures, and forex trading positions.

Forex Pip Calculator

Calculate pip value, position size, and profit/loss for forex currency pairs with lot size and leverage adjustments.

Forex Position Size Calculator

Determine optimal position size based on account balance, risk percentage, stop loss distance, and currency pair pip value.

Risk/Reward Ratio Calculator

Calculate risk-reward ratios for trades with entry, stop-loss, and target prices showing potential profit, loss, and win rate requirements.

Fibonacci Retracement Calculator

Calculate Fibonacci retracement and extension levels from price swings for technical analysis support and resistance identification.

Pivot Point Calculator

Calculate standard, Fibonacci, Woodie, Camarilla, and DeMark pivot points with support and resistance levels from OHLC data.

Timesheet Calculator

Calculate work hours from clock-in/out times with breaks, overtime, and weekly totals for payroll and invoicing purposes.

Billable Hours Calculator

Track and calculate billable hours with hourly rates, project allocation, and client invoice summaries for consultants and lawyers.

Sales Commission Calculator

Calculate sales commissions with flat rate, tiered, and accelerator structures including draws, splits, and quota attainment tracking.

Gratuity Calculator

Calculate gratuity/severance pay based on years of service, last drawn salary, and applicable rules for different countries.

EMI Calculator

Calculate equated monthly installments for loans with principal, interest rate, and tenure inputs showing payment breakdown and amortization.

SIP Calculator (Systematic Investment)

Calculate systematic investment plan returns with monthly contributions, expected returns, and wealth accumulation projections over time.

PPF Calculator (Public Provident Fund)

Calculate Public Provident Fund maturity value with annual deposits, current interest rates, and 15-year term projections with extensions.

Fixed Deposit Calculator

Calculate fixed deposit maturity amounts with principal, interest rate, tenure, and compounding frequency for bank FD comparison.

Recurring Deposit Calculator

Calculate recurring deposit maturity value with monthly deposit amount, interest rate, and tenure for savings planning.

Stamp Duty Calculator

Calculate stamp duty and registration charges on property purchases based on property value, type, and state/country rates.

Gross to Net Salary Calculator

Convert gross salary to net take-home pay with tax deductions, social security, pension contributions, and other withholdings.

Payment Splitter

Split expenses among multiple people with equal or custom shares, track who owes whom, and settle debts with minimum transactions.

Tax-Equivalent Yield Calculator

Calculate the taxable equivalent yield of municipal bonds based on your tax bracket to compare tax-free versus taxable investments.

Margin of Safety Calculator

Calculate the margin of safety percentage between intrinsic value and market price for value investing analysis and stock screening.

DCF Calculator (Discounted Cash Flow)

Build discounted cash flow models with projected free cash flows, terminal value, WACC, and enterprise value calculation for stock valuation.

WACC Calculator

Calculate weighted average cost of capital from debt cost, equity cost, tax rate, and capital structure for investment appraisal.

CAPM Calculator (Capital Asset Pricing)

Calculate expected return using the Capital Asset Pricing Model with risk-free rate, beta, and market risk premium inputs.

Sharpe Ratio Calculator

Calculate the Sharpe ratio for investment performance evaluation with risk-free rate, portfolio return, and standard deviation inputs.

Beta Calculator

Calculate stock beta from return data series with regression analysis, R-squared, and systematic risk interpretation.

Payback Period Calculator

Calculate simple and discounted payback periods for capital investments with uneven cash flows and cumulative cash flow charting.

Inventory Turnover Calculator

Calculate inventory turnover ratio, days sales of inventory, and carrying costs to optimize stock levels and working capital.

Accounts Receivable Turnover Calculator

Calculate AR turnover ratio and days sales outstanding to assess collection efficiency and cash flow management.

Cash Flow Forecast Tool

Project future cash flow with recurring income and expenses, one-time items, and rolling balance visualization over 12+ months.

Financial Projection Builder

Build 3-5 year financial projections with revenue growth, expense assumptions, and scenario analysis for business planning.

Revenue Forecast Calculator

Model revenue projections with growth rates, seasonal adjustments, new product launches, and pipeline conversion assumptions.

Startup Cost Calculator

Estimate startup launch costs across categories - legal, equipment, marketing, inventory, rent - with one-time versus recurring classification.

Crowdfunding Goal Calculator

Calculate your crowdfunding campaign goal including production costs, platform fees, shipping, taxes, and stretch goal planning.

Equity Dilution Calculator

Model equity dilution across funding rounds with pre/post-money valuation, option pool, and cap table impact visualization.

Cap Table Calculator

Build and manage capitalization tables with founders, investors, option pool, convertible notes, and SAFEs with dilution modeling.

Convertible Note Calculator

Calculate convertible note conversion terms including discount rate, valuation cap, interest accrual, and resulting equity ownership.

SAFE Calculator (Simple Agreement)

Model SAFE (Simple Agreement for Future Equity) conversion scenarios with valuation cap, discount, and pro-rata rights analysis.

Vesting Schedule Calculator

Calculate equity vesting schedules with cliff period, vesting duration, acceleration triggers, and unvested share forfeiture modeling.

Stock Option Value Calculator

Calculate stock option values using Black-Scholes model with current price, strike price, volatility, time to expiration, and risk-free rate.

Cost Per Unit Calculator

Calculate manufacturing cost per unit with direct materials, direct labor, and overhead allocation across production volumes.

Shipping Cost Calculator

Estimate shipping costs by package dimensions, weight, destination, and carrier with dimensional weight and rate comparison.

Etsy Fee Calculator

Calculate Etsy seller fees including listing fees, transaction fees, payment processing, and shipping label costs with profit analysis.

Amazon FBA Fee Calculator

Calculate Amazon FBA fees including referral, fulfillment, storage, and long-term storage fees with profitability analysis per product.

eBay Fee Calculator

Calculate eBay selling fees including insertion fees, final value fees, payment processing, and promoted listing costs with net profit.

Shopify Profit Calculator

Calculate Shopify store profitability with subscription costs, transaction fees, shipping, COGS, and marketing spend per order.

Stripe Fee Calculator

Calculate Stripe payment processing fees for domestic and international transactions with net amount and break-even price analysis.

PayPal Fee Calculator

Calculate PayPal transaction fees for personal, business, and international payments with invoice amount and net proceeds calculation.

Credit Card Processing Fee Calculator

Compare credit card processing fees across providers with interchange-plus, flat-rate, and tiered pricing models.

Sales Forecast Calculator

Build sales forecasts using pipeline, historical trends, and growth rate methods with monthly/quarterly revenue projections.

Conversion Rate Calculator

Calculate conversion rates with statistical significance testing, confidence intervals, and sample size requirements for A/B tests.

CPM Calculator (Cost Per Thousand)

Calculate CPM, total cost, and impressions for advertising campaigns with budget optimization and channel comparison.

CPC Calculator (Cost Per Click)

Calculate cost per click, total clicks, and budget requirements for PPC campaigns with ROAS and conversion tracking.

ROAS Calculator (Return on Ad Spend)

Calculate return on ad spend with revenue attribution, ad cost inputs, and target ROAS modeling across marketing channels.

Email Marketing ROI Calculator

Calculate email campaign ROI with list size, open rate, CTR, conversion rate, average order value, and campaign costs.

Social Media ROI Calculator

Calculate social media marketing return on investment with reach, engagement, conversions, and attribution across platforms.

Content Marketing ROI Calculator

Estimate content marketing ROI from content production costs, traffic generated, lead conversions, and attributed revenue.

Influencer Rate Calculator

Calculate fair influencer marketing rates based on follower count, engagement rate, platform, content type, and industry benchmarks.

YouTube Revenue Calculator

Estimate YouTube earnings from views, RPM, ad formats, and subscriber count with monthly and annual revenue projections.

Podcast Sponsorship Calculator

Calculate podcast sponsorship rates and revenue from downloads, CPM rates, ad spots per episode, and sponsorship tiers.

Employee Total Cost Calculator

Calculate true employee cost including salary, benefits, taxes, equipment, overhead, and training for hiring budget planning.

Contractor vs Employee Cost Calculator

Compare total costs of hiring a full-time employee versus independent contractor with taxes, benefits, and overhead analysis.

Cost Per Hire Calculator

Calculate cost per hire with recruiting, advertising, interviewing, onboarding, and training expenses for HR budget planning.

Employee Turnover Cost Calculator

Calculate the financial impact of employee turnover including separation, replacement, training, and productivity loss costs.

Project Profitability Calculator

Calculate project margins with labor costs, materials, overhead allocation, and revenue to determine project-level profitability.

Markup Calculator

Calculate selling price from cost and markup percentage or find the markup applied to reach a selling price with margin comparison.

Gross Profit Calculator

Calculate gross profit and gross margin from revenue and cost of goods sold with multi-product analysis and trend comparison.

Operating Margin Calculator

Calculate operating margin and operating income from revenue, COGS, and operating expenses with industry benchmark comparisons.

Net Profit Calculator

Calculate net profit and net margin after all expenses, interest, and taxes with waterfall breakdown from revenue to bottom line.

Food Cost Calculator

Calculate food cost percentage and menu pricing for restaurants with ingredient costs, portion sizes, and target margin analysis.

Recipe Cost Calculator

Calculate total recipe cost and per-serving cost from ingredient prices and quantities for menu pricing and catering estimates.

Rent Affordability Calculator

Determine affordable rent based on income using the 30% rule and other guidelines with utilities and lifestyle expense adjustments.

Rent Split Calculator

Split rent fairly among roommates based on room size, amenities, bathroom access, and natural light using weighted allocation.

Late Fee / Interest Penalty Calculator

Calculate late fees and interest penalties on overdue invoices with flat fees, percentage-based charges, and compounding options.

Escrow Payment Calculator

Calculate monthly escrow payments for property taxes and insurance with annual analysis and surplus/shortage adjustments.

Commercial Rent Calculator

Calculate commercial lease costs with base rent, NNN charges, CAM fees, percentage rent, and annual escalation projections.

Operating Expense Ratio Calculator

Calculate operating expense ratio for real estate properties with NOI, gross income, and expense breakdown analysis.

Real Estate ROI Calculator

Calculate total return on real estate investments including cash flow, appreciation, principal paydown, and tax benefits.

1031 Exchange Calculator

Model 1031 exchange tax deferral scenarios comparing capital gains taxes saved versus reinvestment requirements and boot calculation.

ADU Cost & ROI Calculator

Estimate accessory dwelling unit construction costs and calculate rental income ROI with financing and payback period analysis.

Airbnb Income Calculator

Estimate Airbnb rental income with nightly rates, occupancy rates, cleaning fees, platform fees, and expense deductions.

Money Counter / Cash Counter

Count cash by entering quantities of each bill and coin denomination to get total value with multiple currency support.

Change Maker / Cash Register

Calculate optimal change to give customers using minimum coins and bills from amount tendered and purchase total.

Per Diem Calculator

Calculate per diem travel allowances for meals, lodging, and incidentals based on destination and federal/company rates.

Mileage Reimbursement Calculator

Calculate mileage reimbursement amounts using IRS standard rates with round-trip tracking and annual tax deduction totals.

Travel Expense Calculator

Estimate total business travel costs including flights, hotels, meals, ground transport, and incidentals with budget comparison.

Home Improvement ROI Calculator

Estimate return on investment for home renovation projects with remodeling cost, home value increase, and resale impact analysis.

Construction Cost Estimator

Estimate building construction costs by square footage, materials, finishes, and labor with regional cost adjustment factors.

Hourly Rate to Annual Salary Calculator

Convert hourly wages to annual salary and back with adjustable work hours per week, paid time off, and benefit value inclusion.

Biweekly Mortgage Payment Calculator

Calculate savings from biweekly versus monthly mortgage payments with years saved, interest reduction, and payment comparison.

HELOC Payment Calculator

Calculate HELOC payments during draw and repayment periods with variable rate modeling, interest-only phase, and balance projections.

ARM Calculator (Adjustable Rate Mortgage)

Model adjustable rate mortgage scenarios with initial fixed period, rate caps, index margins, and worst-case payment projections.

Mortgage Points Calculator

Calculate whether buying mortgage discount points is worth it with break-even timeline and total interest savings comparison.

PMI Calculator

Calculate private mortgage insurance costs and when PMI drops off based on loan-to-value ratio, home value, and payment schedule.

Tax Deduction Tracker

Track and categorize tax-deductible expenses throughout the year with standard vs itemized deduction comparison and tax savings estimate.

Charitable Donation Tax Calculator

Calculate tax savings from charitable donations with AGI limits, deduction types, and bunching strategy for itemization thresholds.

Home Office Deduction Calculator

Calculate home office tax deduction using simplified and regular methods with square footage, expenses, and allocation percentages.

Vehicle Depreciation Calculator

Calculate vehicle depreciation over time with make/model adjustments, mileage impact, and residual value estimation by year.

Business Loan Calculator

Calculate business loan payments and total cost for term loans, SBA loans, and lines of credit with origination fee inclusion.

SBA Loan Calculator

Calculate SBA 7(a) and 504 loan payments with guarantee fees, interest rate spreads, and multi-term amortization schedules.

Equipment Financing Calculator

Calculate equipment loan or lease payments with purchase price, down payment, interest rate, and term length comparisons.

Invoice Factoring Calculator

Calculate invoice factoring costs and net proceeds with advance rates, factor fees, and comparison against traditional financing.

Accounts Payable Tracker

Track outstanding invoices and bills by vendor with due dates, aging categories, and payment scheduling for cash flow management.

SaaS Pricing Page Builder

Design and preview SaaS pricing pages with tier comparison tables, feature matrices, and annual/monthly toggle calculations.

ARR Growth Rate Calculator

Calculate and project annual recurring revenue growth rate with new ARR, expansion, contraction, and churn components charted over time.

SaaS Quick Ratio Calculator

Calculate SaaS Quick Ratio from new MRR, expansion MRR, contraction MRR, and churned MRR to assess revenue growth efficiency.

Cohort Analysis Builder

Build customer cohort retention tables with signup date grouping, retention rates by period, and heat map visualization.

Scenario Analysis Calculator

Build best-case, base-case, and worst-case financial scenarios with probability weighting and expected value calculation.

Sensitivity Analysis Table Builder

Create two-variable data tables showing how outputs change as two key assumptions vary with conditional formatting heat maps.

Monte Carlo Portfolio Simulator

Run Monte Carlo simulations on investment portfolios with configurable return distributions, correlations, and probability of ruin analysis.

Tax-Loss Harvesting Calculator

Calculate tax savings from harvesting investment losses against gains with wash sale rules, carryover limits, and optimal pairing.

Estate Tax Calculator

Estimate federal and state estate taxes on total estate value with exemptions, deductions, and marital transfer planning.

Gift Tax Calculator

Calculate gift tax implications with annual exclusion amounts, lifetime exemption tracking, and split gift strategies.

Child Support Calculator

Estimate child support payments based on income, custody arrangement, number of children, and state guidelines.

Alimony / Spousal Support Calculator

Estimate alimony payments based on income disparity, marriage duration, and state guidelines with tax impact analysis.

Child Tax Credit Calculator

Calculate child tax credit amount based on number of qualifying children, income, filing status, and phase-out thresholds.

Earned Income Tax Credit Calculator

Calculate EITC eligibility and amount based on earned income, filing status, number of qualifying children, and income thresholds.

Education Tax Credit Calculator

Calculate American Opportunity and Lifetime Learning credit amounts from tuition expenses with income phase-out modeling.

EV Tax Credit Calculator

Determine electric vehicle tax credit eligibility and amount based on vehicle MSRP, income limits, and battery capacity requirements.

Section 179 Deduction Calculator

Calculate Section 179 equipment deduction limits and tax savings with bonus depreciation and phase-out threshold analysis.

Expense Report Generator

Create formatted expense reports with categories, dates, amounts, and receipt references for reimbursement submission.

Purchase Price Allocation Calculator

Allocate acquisition purchase price across tangible assets, intangible assets, and goodwill for M&A accounting compliance.

Revenue / Profit Per Employee Calculator

Calculate revenue per employee and profit per employee metrics for organizational efficiency benchmarking and headcount planning.

Cost-Benefit Analysis Calculator

Structure cost-benefit analyses with quantified costs, benefits, NPV, BCR, and sensitivity testing for project decision making.

Economic Order Quantity (EOQ) Calculator

Calculate optimal order quantity to minimize total inventory costs with holding costs, ordering costs, and demand rate inputs.

Reorder Point Calculator

Calculate inventory reorder points with lead time demand, safety stock levels, and service level requirements for stock management.

Safety Stock Calculator

Calculate optimal safety stock levels based on demand variability, lead time variability, and desired service level.

Dead Stock Cost Calculator

Calculate the carrying cost of dead inventory with storage, insurance, depreciation, and opportunity cost analysis for clearance planning.

Sales Pipeline Value Calculator

Calculate weighted pipeline value by multiplying deal amounts by stage probabilities with close date forecasting and quota coverage.

Customer Churn Impact Calculator

Quantify the revenue impact of customer churn with lost recurring revenue, acquisition cost to replace, and retention investment analysis.

R&D Tax Credit Calculator

Estimate R&D tax credit eligibility and amounts from qualified research expenses using regular and simplified calculation methods.

Profit Sharing Calculator

Allocate profit sharing distributions among employees using pro-rata, comp-to-comp, or tiered methods with 401(k) integration.

Dividend Payout Ratio Calculator

Calculate dividend payout ratio, retention ratio, and sustainable growth rate from earnings per share and dividend per share data.

Diluted EPS Calculator

Calculate diluted earnings per share accounting for stock options, convertible bonds, and warrants using the treasury stock method.

Enterprise Value Calculator

Calculate enterprise value from market cap, debt, cash, and preferred equity with EV/EBITDA and EV/Revenue multiples.

Book Value Per Share Calculator

Calculate book value per share from total assets, liabilities, and shares outstanding with price-to-book ratio analysis.

Retained Earnings Calculator

Calculate retained earnings balance from beginning balance, net income, and dividends declared with multi-period tracking.

Cash Conversion Cycle Calculator

Calculate cash conversion cycle from days inventory outstanding, days sales outstanding, and days payable outstanding metrics.

DuPont Analysis Calculator

Decompose return on equity into profit margin, asset turnover, and financial leverage components using the DuPont framework.

Altman Z-Score Calculator

Calculate Altman Z-Score for bankruptcy risk assessment from working capital, retained earnings, EBIT, equity, and revenue ratios.

Investment Fee Calculator

Calculate how investment fees (expense ratios, advisory fees, loads) compound and reduce portfolio value over your investment horizon.

Required Rate of Return Calculator

Calculate the minimum return needed from investments to meet financial goals given current savings, timeline, and contributions.

Wealth Tax Calculator

Model wealth tax scenarios with net worth brackets, exemption thresholds, and annual tax impact on wealth accumulation over time.

Financial Independence Number Calculator

Calculate your FI number - the portfolio size needed to cover annual expenses - with withdrawal rate and spending adjustment modeling.

Coast FIRE Calculator

Calculate when you can stop contributing to retirement accounts and let compound growth reach your target by retirement age.

Barista FIRE Calculator

Calculate part-time income needed after partial FIRE to cover expenses while investments grow to full financial independence.

Savings Rate Calculator

Calculate your personal savings rate from income and expenses with years-to-FIRE projection at different savings rate levels.

Net Income After Tax Calculator

Calculate net income after all taxes, deductions, and withholdings from gross income with take-home pay breakdown.

Hourly Paycheck Calculator

Calculate take-home pay for hourly workers with regular and overtime hours, taxes, and deductions per pay period.

Bonus Tax Calculator

Calculate taxes on bonus income using aggregate and percentage methods with net bonus amount and effective tax rate.

Severance Pay Calculator

Calculate severance package value with weeks of pay per year of service, benefits continuation, and lump-sum versus installment comparison.

Unemployment Benefits Calculator

Estimate weekly unemployment benefit amount based on prior earnings, state maximum, and benefit duration eligibility.

Disability Insurance Needs Calculator

Calculate disability insurance coverage needs based on income, expenses, existing coverage, savings, and elimination period options.

Umbrella Insurance Calculator

Calculate recommended umbrella insurance coverage based on net worth, assets, risk factors, and existing liability limits.

W-9 Form Filler

Fill out IRS W-9 tax forms digitally and save as completed PDF.

W-4 Form Filler

Fill out IRS W-4 employee withholding certificate and save as PDF.

1099 Form Filler

Fill out IRS 1099 tax forms for independent contractors and save as PDF.

I-9 Form Filler

Fill out USCIS I-9 employment eligibility verification forms as PDF.

Mortgage Payoff Calculator

Calculate how extra payments accelerate mortgage payoff with interest savings and visual amortization chart.

Stock Profit Calculator

Calculate gains or losses from stock trades with buy/sell price, shares, and commission inputs.

Currency Denomination Calculator

Calculate the minimum number of bills and coins needed to make any amount for cash register balancing.

Mortgage Affordability Calculator

Estimate how much house you can afford based on income, debts, down payment, and interest rate.

Auto / Car Loan Calculator

Calculate monthly car payments with trade-in value, down payment, taxes, and total cost of ownership.

Investment Growth Calculator

Project investment growth over time with initial amount, monthly contributions, and variable return rates.

Invoice Template Designer

Design custom invoice templates with drag-and-drop field placement, logo upload, and style customization.

IBAN Validator

Validate International Bank Account Numbers with check digit verification and country format checking.

Federal Income Tax Calculator

Estimate federal income tax liability by bracket with filing status, deductions, credits, and effective rate charts.

State Income Tax Calculator

Calculate state income tax for all 50 US states with bracket visualization and comparison charts.

Self-Employment Tax Calculator

Calculate SE tax, Social Security, and Medicare contributions for freelancers and independent contractors.

Capital Gains Tax Calculator

Estimate short-term and long-term capital gains tax on investments, real estate, and asset sales with holding period analysis.

Property Tax Estimator

Estimate annual property taxes based on assessed value, mill rate, and exemptions with multi-year projection charts.

VAT / GST Calculator

Calculate value-added tax and goods-services tax for 100+ countries with inclusive/exclusive price conversion.

Tax Withholding Estimator (W-4)

Estimate correct W-4 withholding allowances to avoid under/over-payment with refund or owed projections.

Estate & Inheritance Tax Calculator

Estimate federal estate tax and state inheritance tax with exemption thresholds, marital deduction, and trust scenarios.

Crypto Tax Calculator

Calculate cryptocurrency capital gains using FIFO, LIFO, or HIFO with transaction import, wash sale detection, and tax lot tracking.

Payroll Tax Calculator

Calculate employer and employee payroll taxes including FICA, FUTA, SUTA with annual cost breakdowns and charts.

Quarterly Estimated Tax Calculator

Calculate quarterly estimated tax payments for self-employed with safe harbor rules, penalty avoidance, and payment schedule.

Tax Bracket Visualizer

Interactive stacked bar chart showing marginal vs effective tax rates across all brackets with year-over-year comparison.

Tax Deduction Tracker

Track and categorize tax-deductible expenses throughout the year with receipt logging, category summaries, and Schedule C/A alignment.

Sales & Use Tax Rate Lookup

Look up combined state, county, and city sales tax rates for any US ZIP code with nexus indicator and exemption notes.

Tax-Loss Harvesting Analyzer

Identify tax-loss harvesting opportunities in a portfolio by comparing unrealized gains/losses with wash sale rule checks.

Retirement Savings Calculator

Project retirement savings growth with contributions, employer match, inflation adjustment, and Monte Carlo simulation charts.

Retirement Income Planner

Plan retirement income from Social Security, pensions, 401k, and IRA with withdrawal strategy visualization and longevity risk.

401(k) Contribution Optimizer

Optimize 401(k) contributions with employer match analysis, Roth vs Traditional comparison, and tax-deferred growth projection.

Roth Conversion Calculator

Analyze Roth IRA conversion scenarios with tax impact, break-even year, and projected after-tax wealth comparison charts.

Social Security Benefits Estimator

Estimate Social Security benefits at age 62, full retirement age, and 70 with spousal benefits and break-even analysis.

Required Minimum Distribution Calculator

Calculate required minimum distributions for traditional IRA, 401(k), and inherited accounts with updated SECURE Act tables.

FIRE Calculator (Financial Independence)

Calculate your financial independence number, years to FIRE, and safe withdrawal rate with lean/fat FIRE scenarios.

Pension Lump Sum vs Annuity Calculator

Compare pension lump sum versus annuity payout options with present value analysis and breakeven life expectancy.

Retirement Savings Gap Analyzer

Identify the gap between current savings trajectory and retirement goals with catch-up contribution recommendations.

IRA Contribution & Limits Tracker

Track IRA contributions against annual limits with income phase-out ranges, backdoor Roth guidance, and multi-year history.

Annuity Payout Calculator

Calculate fixed, variable, and indexed annuity payouts with surrender charges, death benefit, and income rider projections.

Retirement Withdrawal Strategy Planner

Model withdrawal sequences across taxable, tax-deferred, and Roth accounts to minimize lifetime tax burden with Roth conversion ladder.

HSA Growth & Tax Savings Calculator

Project HSA balance growth with triple tax advantage, contribution limits, and retirement healthcare cost coverage analysis.

Early Withdrawal Penalty Calculator

Calculate 10% early withdrawal penalty and tax impact for 401(k)/IRA distributions with Rule of 55 and 72(t) exception analysis.

Retirement Healthcare Cost Estimator

Estimate retirement healthcare costs including Medicare premiums, Medigap, Part D, and out-of-pocket expenses over retirement horizon.

Stock Return Calculator

Calculate total return, annualized return, and alpha for stock investments with dividend reinvestment and benchmark comparison.

DRIP / Dividend Reinvestment Calculator

Project dividend reinvestment growth over time with yield-on-cost tracking, compounding charts, and income projection tables.

Dividend Income Planner

Plan monthly dividend income streams by allocating across stocks/ETFs with payment calendar, yield analysis, and diversification metrics.

Dollar-Cost Averaging Calculator

Compare lump sum vs dollar-cost averaging strategies with historical backtest simulation and volatility impact charts.

Stock DCF Valuation Calculator

Perform discounted cash flow valuation with free cash flow projection, WACC, terminal value, and sensitivity analysis table.

P/E Ratio Analyzer

Analyze price-to-earnings ratios with forward/trailing comparison, PEG ratio, sector benchmarks, and earnings yield calculation.

Portfolio Rebalancing Calculator

Calculate exact buy/sell amounts to rebalance portfolio to target allocation with tax-lot aware suggestions and drift alerts.

Asset Allocation Visualizer

Visualize portfolio allocation across asset classes with pie/treemap charts, risk scoring, and model portfolio comparison.

Bond Yield Calculator

Calculate current yield, yield to maturity, yield to call, and bond duration with price/yield curve visualization.

Bond Price Calculator

Calculate clean and dirty bond prices from coupon rate, yield, and maturity with accrued interest and settlement date adjustment.

Bond Ladder Builder

Design bond ladders with maturity spacing, reinvestment projections, and income schedule charts for fixed income planning.

Options Profit/Loss Calculator

Calculate options P&L with payoff diagrams for calls, puts, spreads, straddles, and multi-leg strategies with Greeks.

Black-Scholes Options Pricing Calculator

Price European options using Black-Scholes model with implied volatility solver, Greeks display, and sensitivity surface plots.

Covered Call Return Calculator

Calculate covered call returns including premium yield, downside protection, max profit, and annualized return with assignment scenarios.

ETF Expense Ratio Impact Calculator

Visualize the long-term cost of fund expense ratios on returns with side-by-side ETF comparison and fee drag charts.

Investment Fee Calculator

Calculate the cumulative impact of management fees, advisory fees, and trading costs on portfolio returns over decades.

Risk/Reward Ratio Calculator

Calculate risk/reward ratios for trades with entry, stop-loss, and target prices, position sizing, and win rate breakeven analysis.

Sharpe & Sortino Ratio Calculator

Calculate Sharpe, Sortino, and Treynor ratios from portfolio returns with risk-free rate adjustment and rolling period charts.

Portfolio Correlation Matrix Builder

Build correlation matrices for portfolio assets with heat map visualization, diversification score, and efficient frontier plot.

Investment Growth Comparison Chart

Compare growth of multiple investments over time with interactive charts, CAGR labels, and milestone markers.

Mortgage Payment & Amortization Calculator

Calculate monthly mortgage payments with detailed amortization schedule, extra payment impact, and interest savings visualization.

Mortgage Refinance Calculator

Compare current vs refinanced mortgage with breakeven analysis, total interest savings, and monthly payment reduction charts.

Home Affordability Calculator

Calculate maximum home price based on income, debts, down payment, and DTI ratios with monthly cost breakdown.

Rent vs Buy Calculator

Compare total cost of renting vs buying over time with appreciation, tax benefits, opportunity cost, and breakeven year analysis.

Rental Property ROI Calculator

Calculate rental property returns including cash-on-cash, cap rate, IRR, and cash flow with vacancy and maintenance assumptions.

Rental Income & Expense Tracker

Track rental property income, expenses, and net operating income with monthly/yearly summaries and Schedule E categories.

Property Depreciation Calculator

Calculate residential and commercial property depreciation using straight-line and MACRS with cost segregation analysis.

Closing Cost Estimator

Estimate buyer and seller closing costs including title insurance, escrow fees, transfer taxes, and lender fees by state.

Real Estate Commission Calculator

Calculate agent commissions with split scenarios, net proceeds, and comparison of flat-fee vs percentage-based models.

Home Equity & HELOC Calculator

Calculate available home equity, HELOC limits, and CLTV ratio with equity build-up projection charts.

1031 Exchange Calculator

Calculate tax-deferred gain in 1031 like-kind exchanges with boot analysis, timeline requirements, and replacement property targets.

Cap Rate Calculator

Calculate capitalization rate from NOI and property value with market comparison, band of investment, and valuation analysis.

Real Estate Cash Flow Analyzer

Project monthly and annual cash flows for investment properties with waterfall charts, DSCR, and break-even occupancy.

Home Renovation ROI Calculator

Estimate return on investment for home improvement projects with cost-to-value ratios by project type and region.

Land Development Feasibility Calculator

Analyze land development feasibility with construction costs, entitlement expenses, absorption rates, and profit margin projections.

Straight-Line Depreciation Calculator

Calculate straight-line depreciation with salvage value, useful life, and annual/monthly expense schedule with chart.

Declining Balance Depreciation Calculator

Calculate double-declining and 150% declining balance depreciation with switchover to straight-line and book value charts.

MACRS Depreciation Calculator

Calculate MACRS depreciation for US tax purposes across all property classes (3, 5, 7, 10, 15, 20, 27.5, 39 year) with mid-quarter convention.

Section 179 Deduction Calculator

Calculate Section 179 deduction with phase-out thresholds, bonus depreciation, and first-year expense comparison.

Vehicle Depreciation Calculator

Calculate vehicle depreciation by year with luxury auto limits, Section 179 for SUVs, and trade-in/resale value projections.

Fixed Asset Depreciation Tracker

Track multiple fixed assets with different depreciation methods, generate combined schedule, and calculate accumulated depreciation.

Loan Amortization Table Generator

Generate detailed loan amortization tables with extra payments, biweekly schedules, balloon payments, and printable schedules.

Goodwill & Intangible Amortization Calculator

Calculate goodwill and intangible asset amortization for financial reporting and tax with impairment test schedules.

Sum-of-Years-Digits Depreciation Calculator

Calculate sum-of-years-digits accelerated depreciation with yearly expense breakdown and comparison to straight-line method.

Units-of-Production Depreciation Calculator

Calculate depreciation based on actual usage or production output with per-unit cost and remaining life projection.

Cash Flow Statement Builder

Build operating, investing, and financing cash flow statements with waterfall charts and free cash flow calculation.

Cash Flow Forecast Tool

Forecast weekly/monthly cash flows with receivables, payables, and recurring expenses to predict shortfalls and surpluses.

Personal Budget Planner (50/30/20)

Create a personal budget using the 50/30/20 rule with income allocation, category tracking, donut charts, and savings goals.

Zero-Based Budget Maker

Build a zero-based budget where every dollar is assigned a purpose with envelope categories and variance tracking.

Business Budget Template Builder

Build annual business budgets with departmental allocations, monthly breakdowns, and budget-vs-actual variance charts.

Expense Tracker Dashboard

Track daily expenses with category tagging, spending trends, top merchants, and monthly summary dashboard with charts.

Subscription Cost Tracker

Track and total all subscriptions with renewal dates, annual cost projection, and cancellation savings calculator.

Debt Payoff Calculator (Snowball / Avalanche)

Compare debt snowball vs avalanche payoff strategies with payment schedules, interest savings, and payoff timeline charts.

Debt Consolidation Calculator

Compare consolidating multiple debts into one loan with total interest comparison, monthly savings, and breakeven timeline.

Emergency Fund Calculator

Calculate target emergency fund size based on monthly expenses, income stability, and dependents with savings timeline projection.

Savings Goal Tracker

Track progress toward multiple savings goals with visual progress bars, contribution schedules, and target date projections.

Net Worth Tracker

Calculate and track net worth over time with asset/liability categories, trend charts, and milestone markers.

Cost of Living Comparator

Compare cost of living between cities with housing, transport, food, and utilities breakdowns and salary adjustment calculator.

Inflation Impact Calculator

Calculate the real purchasing power loss over time with CPI-based projections, salary erosion, and inflation-adjusted return charts.

529 College Savings Calculator

Project 529 plan growth with contribution schedules, state tax deductions, investment returns, and college cost coverage analysis.

Student Loan Repayment Calculator

Compare repayment plans (Standard, IDR, PAYE, REPAYE) with forgiveness projections, total interest, and monthly payment charts.

Car Lease vs Buy Calculator

Compare total cost of leasing vs buying a vehicle with residual value, opportunity cost, and breakeven mileage analysis.

Auto Loan Calculator

Calculate monthly auto loan payments with trade-in value, down payment, and total interest paid with amortization schedule.

Credit Card Payoff Calculator

Calculate time and interest to pay off credit card balances with minimum payment analysis and extra payment impact charts.

Wedding Budget Planner

Plan wedding budget by category with vendor cost tracking, payment timeline, guest cost analysis, and budget vs actual dashboard.

Financial Ratio Dashboard

Calculate and display 25+ financial ratios (liquidity, profitability, leverage, efficiency) from income statement and balance sheet data.

Profit & Loss Statement Builder

Build income statements with revenue, COGS, operating expenses, and net income with margin analysis and comparison charts.

DuPont Analysis Calculator

Decompose ROE into profit margin, asset turnover, and equity multiplier with 3-factor and 5-factor DuPont models.

Working Capital Calculator

Calculate working capital, current ratio, and quick ratio with cash conversion cycle analysis and trend visualization.

Debt-to-Equity Ratio Calculator

Calculate D/E ratio, debt ratio, interest coverage, and other leverage metrics with industry benchmark comparison.

DSO / DPO / DIO Calculator

Calculate days sales outstanding, days payable outstanding, and days inventory outstanding with cash conversion cycle visualization.

EBITDA Calculator

Calculate EBITDA, EBITDA margin, and EV/EBITDA multiples from financial data with add-back adjustments and comparison tables.

Revenue Growth Rate Analyzer

Analyze revenue growth rates (MoM, QoQ, YoY) with seasonal adjustment, run rate projections, and growth acceleration/deceleration charts.

Gross Margin Analyzer

Analyze gross margins by product line, customer segment, or time period with contribution margin and product mix charts.

Operating Leverage Calculator

Calculate degree of operating leverage, contribution margin ratio, and break-even sensitivity with scenario modeling.

Accounts Receivable Aging Report Builder

Build AR aging reports with 30/60/90/120+ day buckets, collection probability, bad debt estimate, and customer concentration analysis.

Inventory Turnover Calculator

Calculate inventory turnover ratio, days on hand, and carrying cost with ABC analysis and reorder point suggestions.

Financial Benchmark Comparator

Compare company financials against industry benchmarks with radar charts, percentile rankings, and gap analysis.

Altman Z-Score Calculator

Calculate Altman Z-Score for bankruptcy risk assessment with zone classification and historical trend chart.

Business Valuation Calculator

Estimate business value using multiple methods: DCF, comparable multiples, asset-based, and rule of thumb with weighted average.

Startup Cost Calculator

Estimate total startup costs by category (legal, equipment, marketing, inventory) with funding needs and cash runway projection.

Burn Rate & Runway Calculator

Calculate monthly burn rate, cash runway in months, and zero-cash date with revenue offset and funding scenarios.

Cap Table Builder

Build and manage capitalization tables with share classes, option pools, convertible notes, and ownership percentage pie charts.

Equity Dilution Calculator

Model equity dilution across funding rounds with pre/post-money valuation, option pool expansion, and founder ownership tracking.

Convertible Note Calculator

Calculate conversion scenarios for convertible notes with valuation caps, discount rates, interest accrual, and equity conversion.

SAFE Note Calculator

Model Y Combinator SAFE conversions with pre-money, post-money, MFN, and pro-rata provisions with cap table impact.

Employee Stock Option Calculator

Calculate stock option value at exercise with AMT impact, ISO vs NSO comparison, and optimal exercise timing analysis.

Vesting Schedule Calculator

Calculate equity vesting with cliff periods, graded vesting, and acceleration triggers with visual timeline and milestone markers.

SaaS Metrics Dashboard

Track MRR, ARR, churn, LTV, CAC, and other SaaS KPIs with cohort analysis, growth charts, and Rule of 40 scoring.

LTV:CAC Ratio Calculator

Calculate customer lifetime value, customer acquisition cost, and LTV:CAC ratio with payback period and unit economics breakdown.

Churn Rate Calculator

Calculate customer and revenue churn rates (gross/net) with cohort retention curves and revenue impact projections.

MRR Growth Calculator

Break down MRR into new, expansion, contraction, and churned components with waterfall charts and growth rate trends.

Pricing Strategy Modeler

Model pricing tiers, freemium conversion, and price elasticity with revenue maximization analysis and A/B test impact projections.

Financial Projection Builder (3-Year)

Build 3-year financial projections with revenue, expenses, and profitability forecasts in income statement format.

Scenario Analysis Tool (Best/Base/Worst)

Build three-scenario financial models with probability weighting, expected value, and tornado sensitivity charts.

NPV & IRR Calculator

Calculate net present value and internal rate of return for investment cash flows with MIRR, payback period, and profitability index.

WACC Calculator

Calculate weighted average cost of capital with cost of equity (CAPM), cost of debt, and optimal capital structure analysis.

Startup Runway Planner

Plan startup cash runway with hiring timeline, revenue ramp, and funding milestones on an interactive Gantt-like timeline.

Freelance Rate Calculator

Calculate optimal freelance hourly/project rates from salary target, expenses, utilization, and billable hour assumptions.

Billable Hours Tracker

Track billable and non-billable hours by client and project with utilization rate, revenue tracking, and weekly summary reports.

Contractor vs Employee Cost Calculator

Compare total cost of hiring a contractor vs full-time employee including benefits, taxes, overhead, and productivity factors.

Project Cost Estimator

Estimate project costs with labor, materials, subcontractors, and overhead using bottom-up, top-down, or parametric methods.

Sales Commission Calculator

Calculate tiered sales commissions with base + quota, accelerators, spiffs, clawbacks, and on-target earnings projections.

Billing Rate Calculator

Calculate client billing rates from employee cost, overhead multiplier, profit margin, and utilization targets with rate card generation.

Utilization Rate Calculator

Calculate billable utilization rate with target tracking, capacity analysis, and revenue per employee metrics.

Freelance Invoice Builder

Create professional freelance invoices with time entries, expenses, payment terms, and late fee calculations.

Scope Creep Cost Calculator

Quantify the cost of scope creep by tracking change requests, additional hours, and budget overrun with visual impact dashboard.

Retainer Pricing Calculator

Calculate retainer pricing with guaranteed hours, rollover policy, discount vs hourly rate, and annual revenue projection.

Proposal Cost Builder

Build detailed project proposals with phase-based costs, deliverables, timeline, payment milestones, and terms.

Late Payment Fee & Interest Calculator

Calculate late payment fees and interest charges with compounding options, grace periods, and collection letter generation.

Freelance Tax Set-Aside Calculator

Calculate how much to set aside for taxes on each payment received with quarterly payment reminder schedule.

Day Rate Calculator

Convert between hourly, daily, weekly, and monthly rates with working days, vacation adjustment, and international comparison.

Client Profitability Analyzer

Analyze profit per client with revenue, direct costs, time allocation, and profitability ranking with Pareto chart.

Critical Path Method Calculator

Calculate critical path, total float, and free float for project activities with early/late start-finish analysis.

Earned Value Management Calculator

Calculate EVM metrics (CPI, SPI, EAC, ETC, VAC) with S-curve charts, performance indices, and forecast-at-completion analysis.

Resource Allocation Planner

Plan resource allocation across projects with capacity heatmaps, over-allocation alerts, and utilization dashboards.

Capacity Planning Calculator

Calculate team capacity with sprint velocity, planned time off, and buffer allocation for accurate sprint/iteration planning.

Project Budget Tracker

Track project budget vs actual spending with line item detail, earned value, and cost variance analysis with burn-down charts.

Story Point Estimator

Estimate story points using planning poker, T-shirt sizing, or Fibonacci sequences with team velocity calibration and confidence levels.

Work Breakdown Structure Builder

Build hierarchical WBS with task decomposition, cost roll-up, and responsibility assignment in tree diagram format.

Project Timeline Planner

Create visual project timelines with phases, milestones, dependencies, and resource swim lanes on a scrollable timeline.

Project Profitability Calculator

Calculate project profitability with revenue, direct costs, allocated overhead, and margin analysis with visual P&L waterfall.

Time-to-Completion Estimator

Estimate project completion date using three-point estimation with probability distribution and confidence interval charts.

Project Post-Mortem Template

Create structured project post-mortems with what went well, improvements, action items, and lessons learned documentation.

Change Order Cost Calculator

Calculate change order costs with labor, materials, markup, and schedule impact analysis with approval workflow tracking.

Economic Order Quantity (EOQ) Calculator

Calculate optimal order quantity with ordering costs, holding costs, and total cost curve visualization with reorder point.

Safety Stock Calculator

Calculate safety stock levels based on demand variability, lead time, and service level targets with stockout probability curves.

Inventory Valuation Tool (FIFO/LIFO/WAC)

Calculate inventory value using FIFO, LIFO, and weighted average cost methods with COGS comparison and tax impact.

ABC Inventory Analysis Tool

Classify inventory using ABC analysis with cumulative value curves, Pareto distribution, and category management recommendations.

Reorder Point Calculator

Calculate reorder points and reorder quantities with lead time demand, safety stock, and inventory level charts over time.

Inventory Carrying Cost Calculator

Calculate total inventory carrying costs including storage, insurance, obsolescence, and opportunity cost as percentage of inventory value.

Shipping Cost Calculator

Estimate shipping costs by weight, dimensions, and carrier with zone pricing, dimensional weight, and multi-carrier comparison.

Landed Cost Calculator

Calculate total landed cost for imports including freight, customs duty, insurance, and handling with per-unit cost breakdown.

Demand Forecast Tool

Forecast product demand using moving average, exponential smoothing, and seasonal decomposition with accuracy metrics.

Product Cost Breakdown (BOM)

Build bill of materials with component costs, labor, overhead allocation, and total unit cost with margin analysis.

Cost of Quality Calculator

Calculate prevention, appraisal, internal failure, and external failure costs with quality cost ratio and trend analysis.

Life Insurance Needs Calculator

Calculate life insurance coverage needed based on income replacement, debts, education costs, and final expenses with gap analysis.

Disability Insurance Calculator

Calculate disability insurance needs with income replacement ratio, elimination period options, and benefit period comparison.

Insurance Premium Comparison Tool

Compare insurance premiums across coverage levels and deductible options with total cost analysis and break-even deductible calculator.

Umbrella Insurance Calculator

Assess umbrella insurance needs based on net worth, assets, risk factors, and existing liability coverage with gap analysis.

Business Insurance Cost Estimator

Estimate business insurance costs for GL, E&O, D&O, cyber, and workers comp by industry and revenue with coverage checklist.

Business Risk Assessment Calculator

Score and prioritize business risks by probability, impact, and velocity with risk heat maps and mitigation cost-benefit analysis.

Expected Value / Decision Tree Calculator

Build decision trees with probability-weighted outcomes, expected monetary value, and sensitivity analysis for business decisions.

Monte Carlo Simulation Tool

Run Monte Carlo simulations for financial projections with probability distributions, confidence intervals, and histogram outputs.

Health Insurance Plan Comparator

Compare health insurance plans by premium, deductible, copay, coinsurance, and out-of-pocket max with total cost modeling.

Long-Term Care Cost Calculator

Estimate long-term care costs for nursing homes, assisted living, and home care by state with inflation-adjusted projections.

Forex Pip Value Calculator

Calculate pip value, position size, and margin requirements for any currency pair with account currency conversion.

Forex Profit/Loss Calculator

Calculate forex trade P&L with entry/exit prices, lot size, swap rates, and commission across multiple currency pairs.

Forex Margin & Leverage Calculator

Calculate required margin, free margin, and margin level at different leverage ratios with margin call threshold alerts.

Crypto Portfolio Tracker

Track cryptocurrency portfolio with cost basis, unrealized P&L, allocation pie chart, and performance metrics dashboard.

Crypto Profit Calculator

Calculate cryptocurrency trade profits with buy/sell prices, quantity, fees, and ROI with multi-trade averaging.

Crypto Staking Rewards Calculator

Calculate staking rewards and APY for proof-of-stake cryptocurrencies with compounding frequency and lockup period analysis.

DeFi Yield Farming Calculator

Calculate DeFi yield farming returns with impermanent loss estimation, LP token value, and APR/APY comparison across protocols.

Crypto DCA Calculator

Simulate dollar-cost averaging into cryptocurrencies with historical performance, average cost basis, and return visualization.

Overtime Pay Calculator

Calculate overtime pay with regular/OT/double-time rates, weekly hours, and FLSA compliance checks with pay period summaries.

True Employee Cost Calculator

Calculate total employment cost including salary, benefits, payroll taxes, workspace, equipment, and overhead per employee.

Bonus Tax Calculator

Calculate taxes on bonuses using supplemental flat rate or aggregate method with net-to-gross calculation for target net bonuses.

Pay Raise Impact Calculator

Calculate the impact of pay raises on take-home pay, annual earnings, and tax bracket with inflation-adjusted real raise analysis.

Salary Negotiation Prep Tool

Prepare for salary negotiations with total compensation comparison, market range analysis, and counteroffer scenario modeling.

Social & Marketing (204)

Link Shortener with Analytics

Shorten URLs with local redirect tracking via localStorage. See click counts and generate a QR code for each link.

UTM Link Builder & Tracker

Build UTM-tagged URLs for campaign tracking with source, medium, campaign, term, and content parameters.

A/B Headline Tester

Enter 2+ headlines and see simulated previews in Google results, email subject lines, and social posts side-by-side.

Tweet / Post Character Counter

Count characters for Twitter/X, LinkedIn, Facebook, and Instagram with platform-specific limits and warnings.

Click-Through Rate Calculator

Calculate click-through rates from impressions and clicks with industry benchmarks and trend analysis.

Email Subject Line Length Checker

Check email subject line length against best practices for desktop and mobile with preview text optimization.

Emoji Picker & Search

Search, browse, and copy emojis by category or keyword with skin tone variants and recently used tracking.

Receipt Scanner & Parser

Upload a receipt photo and manually enter total, date, vendor, and line items. Copy or save structured data locally.

Currency Exchange Calculator

Convert between 30+ currencies using approximate reference rates. Quick conversions with a common-amounts table.

Unit Price Comparator

Compare product prices per unit ($/oz, $/ml, $/count) with visual comparison bars. Great for grocery shopping.

Social Media Image Size Reference Guide

Quick reference for image dimensions across Facebook, Instagram, Twitter/X, LinkedIn, YouTube, and TikTok.

Thumbnail Preview Tool

Preview how thumbnails and OG images will appear on YouTube, social platforms, and search engine results.

Meme Generator

Upload images and add top/bottom impact text with font size, outline, and positioning controls.

Web Banner Maker

Design web banners and ads in standard IAB sizes with text, shapes, images, and download options.

Social Media Post Designer

Design Instagram, Facebook, and Twitter posts with templates, text layers, backgrounds, and exact platform dimensions.

Instagram Story Template Maker

Create Instagram story designs with text, stickers, gradients, and 9:16 aspect ratio export.

YouTube Thumbnail Maker

Design YouTube thumbnails at 1280x720 with face cutouts, bold text, and high-contrast backgrounds.

QR Code Design Studio

Design branded QR codes with custom eyes, body shapes, colors, and embedded center logos.

App Store Screenshot Maker

Create App Store and Google Play screenshot frames with device bezels, captions, and marketing text.

Twitter/X Header Image Maker

Design Twitter header images at 1500x500 with text, backgrounds, and avatar-safe zone preview.

LinkedIn Banner Maker

Design LinkedIn profile banner images at 1584x396 with professional layouts and text overlays.

Facebook Cover Photo Maker

Design Facebook cover photos at 820x312 with mobile preview and profile picture overlap simulation.

Instagram Grid Splitter

Split one image into 3, 6, or 9 tiles for a seamless Instagram grid layout.

OG Image Generator

Create Open Graph preview images for social media sharing with text and branding.

Email Signature Image Maker

Create professional email signature banner images with contact info and logo.

Twitter/X Post Image Maker

Create properly sized images for Twitter/X posts at 1200x675 with text overlays.

Pinterest Pin Maker

Create tall Pinterest-optimized pin images at 1000x1500 with text and branding.

Social Media Image Checker

Preview how images will look when shared on Facebook, Twitter, and LinkedIn.

Image Safe Zone Checker

Overlay safe zone guides for social media platforms to check text placement.

Hashtag Generator

Enter a topic and generate relevant hashtag suggestions organized by popularity tiers for social media posts.

Social Media Post Scheduler

Draft and schedule social media posts with platform-specific previews and optimal posting time suggestions.

Engagement Rate Calculator

Calculate social media engagement rates from likes, comments, shares, and follower counts with benchmarks.

Bio Link Page Builder

Create a link-in-bio page with custom links, colors, and profile picture for social media profiles.

Social Media Bio Generator

Build social media bios with character limits for each platform, emoji suggestions, and link formatting.

YouTube Thumbnail Previewer

Upload a thumbnail image and preview how it would appear in YouTube search results and suggested videos.

SERP Preview Tool

Simulate Google search result listings with pixel-accurate title and description truncation preview.

LinkedIn Post Preview

Preview how your URL will appear when shared on LinkedIn with title, description, and image rendering.

Pinterest Pin Preview

Preview how your content will appear as a Pinterest pin with rich pin data and image rendering.

UTM Campaign URL Builder

Build UTM-tagged campaign URLs with source, medium, campaign, term, and content parameters for analytics.

Domain Age Checker

Check when a domain was first registered and calculate its age for SEO domain authority assessment.

Title Tag Preview Tool

Preview title tags across Google, Bing, and browser tabs with pixel-width measurement and truncation alerts.

Link Preview Card Generator

Generate and preview link cards as they appear in messaging apps like Slack, Discord, and iMessage.

Keyword Combination Generator

Generate keyword combinations by mixing terms across multiple word lists for PPC and SEO research.

Long-Tail Keyword Generator

Generate long-tail keyword variations by combining seed keywords with common modifiers and question patterns.

LSI Keyword Generator

Generate semantically related keywords and phrases from seed terms using co-occurrence analysis patterns.

Google Ads Preview

Preview Google search and display ad formats with headline, description, and extension character limits.

Twitter Thread Formatter

Format long text into numbered Twitter threads with character counting and thread preview display.

Instagram Caption Formatter

Format Instagram captions with line breaks, invisible characters, and hashtag grouping for clean display.

Social Media Character Counter

Count characters against platform limits for Twitter, Instagram, LinkedIn, Facebook, and YouTube.

SERP Snippet Previewer

Preview how your page appears in Google, Bing, and DuckDuckGo search results with pixel-accurate title truncation and rich snippet formatting.

Google Ads Preview Builder

Build and preview Google Ads text ads with headlines, descriptions, sitelinks, and callouts. See responsive search ad combinations in real time.

Featured Snippet Optimizer

Structure your content for Google featured snippets. Analyze paragraph, list, and table formats with character count validation and preview.

Rich Result Type Tester

Paste JSON-LD or Microdata and see how rich results render for recipes, products, events, FAQs, and how-to cards.

Knowledge Panel Simulator

Simulate a Google Knowledge Panel for your brand or person. Enter entity data and see a realistic panel preview with image, description, and facts.

SERP Position CTR Estimator

Estimate click-through rates by SERP position using industry benchmarks. Calculate expected traffic from rankings and search volume.

Local Pack Previewer

Preview how your business appears in the Google Local 3-Pack. Enter NAP data, ratings, and categories to simulate the map listing.

Image Search Preview

Preview how images appear in Google Images search results. Check alt text length, file naming conventions, and thumbnail cropping.

Video SERP Preview

Preview how your video appears in Google search with thumbnail, duration badge, and VideoObject schema. Optimize for video carousels.

Shopping Result Previewer

Preview Google Shopping and product listing ads. Enter product data, price, and images to see how your products appear in shopping results.

Product Schema Builder

Generate Product schema markup with price, availability, reviews, and brand data. Export valid JSON-LD for e-commerce pages.

Local Business Schema Builder

Generate LocalBusiness schema with address, hours, geo coordinates, and contact info. Supports restaurants, stores, and service businesses.

Event Schema Builder

Create Event schema markup with dates, venue, performers, and ticket info. Preview the rich result and export JSON-LD.

Article Schema Builder

Generate Article, NewsArticle, or BlogPosting schema with author, publisher, date, and image data. AMP-compatible output.

Recipe Schema Builder

Build Recipe schema markup with ingredients, steps, nutrition, cook time, and ratings. Preview the rich result card.

How-To Schema Builder

Create HowTo schema markup with steps, tools, supplies, and images. Generate JSON-LD for step-by-step rich results.

Breadcrumb Schema Builder

Generate BreadcrumbList schema for site navigation. Add URL levels and see the breadcrumb trail as it appears in search results.

Review & Rating Schema Builder

Generate AggregateRating and Review schema markup. Enter ratings, review count, and author data for star-rich results.

VideoObject Schema Builder

Create VideoObject schema markup with thumbnail, duration, upload date, and embed URL. Optimize for video rich results.

Job Posting Schema Builder

Generate JobPosting schema with salary, location, requirements, and application info. Preview the Google Jobs card.

Course Schema Builder

Build Course schema markup with provider, description, cost, and schedule. Generate JSON-LD for education rich results.

Software App Schema Builder

Generate SoftwareApplication schema with platform, pricing, rating, and download info. Preview the app rich result.

Organization Schema Builder

Create Organization schema with logo, social profiles, contact info, and founding details. Enhance brand Knowledge Panels.

Person Schema Builder

Generate Person schema markup with bio, job title, social profiles, and images. Build personal brand entity data.

Speakable Schema Builder

Create Speakable schema markup for voice search and smart speakers. Define which content sections are suitable for text-to-speech.

Server Log File Analyzer

Upload server access logs and visualize bot crawl patterns, status codes, response times, and crawl frequency by URL path.

Meta Robots Tag Simulator

Simulate how meta robots directives affect indexing. Test noindex, nofollow, nosnippet, max-snippet, and max-image-preview combinations.

URL Structure Analyzer

Analyze URL structure for SEO best practices. Check length, depth, parameters, hyphens, keywords, and HTTPS. Score with recommendations.

Site Architecture Planner

Plan website information architecture with a drag-and-drop tree builder. Visualize URL hierarchy, silo structure, and navigation depth.

Page Title Length Checker

Check title tag length in characters and pixels for Google desktop and mobile SERPs. Batch check multiple titles with truncation preview.

H1-H6 Heading Validator

Paste HTML and validate heading tag hierarchy (H1-H6). Detect missing levels, multiple H1s, and incorrect nesting with a visual tree view.

LinkedIn Post Previewer

Preview how your link appears when shared on LinkedIn. Check OG image dimensions, title truncation, and description formatting.

Resource Loading Visualizer

Visualize critical rendering path with a waterfall chart. Simulate resource loading order for CSS, JS, fonts, and images.

Third-Party Script Auditor

Catalog third-party scripts and estimate their performance impact. Categorize by type (analytics, ads, social) and suggest loading strategies.

Above-the-Fold CSS Extractor

Paste your CSS and HTML to extract above-the-fold critical CSS. Generates inline styles and deferred stylesheet loading code.

Keyword Clustering Tool

Paste a keyword list and group them into topical clusters by semantic similarity. Visualize clusters and export grouped keyword maps.

Long-Tail Keyword Expander

Enter a seed keyword and generate long-tail variations using question, comparison, preposition, and modifier patterns.

Keyword Difficulty Estimator

Estimate keyword difficulty based on SERP feature presence, domain authority patterns, and content length benchmarks. Visual difficulty gauge.

Search Intent Classifier

Classify keywords by search intent: informational, navigational, transactional, or commercial. Batch classify with content type recommendations.

Keyword Content Gap Finder

Enter your keywords and competitor keywords to identify content gaps. Venn diagram visualization shows unique and overlapping topic coverage.

Topic Authority Mapper

Map your content topics into a hub-and-spoke model. Visualize topical authority coverage with pillar pages and supporting content clusters.

Title Tag Generator

Generate SEO-optimized title tags from keywords and page context. Multiple templates with power words, numbers, and emotional triggers.

Keyword Cannibalization Detector

Upload a list of pages and their target keywords to detect cannibalization. Identify conflicting pages and recommend consolidation strategies.

People Also Ask Expander

Enter a question and generate People Also Ask-style related questions using pattern templates. Build FAQ content that targets PAA boxes.

Content Decay Tracker

Track content performance over time. Enter traffic or ranking data points and visualize decay trends with refresh priority scoring.

Entity Extractor & Analyzer

Paste content and extract named entities (people, places, organizations, products). Analyze entity density and suggest entity-rich optimizations.

TF-IDF Content Analyzer

Analyze term frequency-inverse document frequency for content optimization. Compare your content terms against corpus benchmarks.

Voice Search Optimizer

Optimize content for voice search queries. Analyze question formats, conversational tone, and featured snippet readiness for smart speakers.

Content Calendar Planner

Plan and organize content with a drag-and-drop calendar. Set publish dates, assign topics, track status, and export to CSV.

Link Building Outreach Tracker

Track link building outreach campaigns. Log prospects, emails sent, responses, and link placements with pipeline visualization.

Domain Authority Estimator

Estimate domain authority from backlink metrics you input. Compare multiple domains side by side with radar chart visualization.

Link Intersection Finder

Upload multiple backlink lists and find domains that link to your competitors but not to you. Prioritize by frequency and relevance.

Link Reclamation Tool

Track lost and broken backlinks for reclamation. Log link status, outreach attempts, and recovery success rate with trend charts.

Guest Post Pitch Builder

Create personalized guest post pitches with templates. Track pitch success rates, follow-ups, and published placements.

Resource Page Link Finder

Enter a niche and find resource page link opportunities using URL pattern matching. Score and prioritize prospects by relevance.

Link Velocity Tracker

Track the rate of new backlink acquisition over time. Chart link velocity trends and compare against competitor growth rates.

Skyscraper Content Planner

Plan skyscraper content by analyzing top-ranking content metrics. Track word count, media types, and linking domains for content you aim to surpass.

Unlinked Mention Tracker

Log brand mentions without links and track outreach to convert them into backlinks. Pipeline view with conversion rate metrics.

Link Attribute Checker

Paste HTML and analyze all link attributes: rel values (nofollow, sponsored, ugc), target, title, and anchor text. Batch audit with summary.

Link Building ROI Calculator

Calculate the ROI of link building campaigns. Input costs, acquired links, traffic gains, and conversion values to measure effectiveness.

NAP Consistency Checker

Enter your Name, Address, and Phone across multiple directories and check for inconsistencies. Highlight mismatches with correction suggestions.

Local Citation Tracker

Track local business citations across directories. Log citation sources, accuracy status, and last verified dates with completeness scoring.

Google Business Post Previewer

Preview Google Business Profile posts including events, offers, and updates. Check image dimensions, text limits, and CTA button formatting.

Review Response Generator

Generate professional responses to customer reviews using templates. Customize for positive, neutral, and negative reviews with tone controls.

Local Keyword Generator

Generate local keyword variations by combining services with locations. Support for city, neighborhood, county, and near-me modifiers.

Local Landing Page Scorer

Score local landing pages against best practices. Check for NAP, local schema, map embed, reviews, and location-specific content.

Geo Grid Rank Tracker

Visualize local search rankings on a grid map. Enter rankings at different geographic points and see a heatmap of your local visibility.

Review Sentiment Analyzer

Paste customer reviews and analyze sentiment distribution. Categorize positive, negative, and neutral themes with word cloud visualization.

Service Area Mapper

Define and visualize service areas on an interactive map. Draw polygons, set radius zones, and export area data for local SEO pages.

Local Competitor Matrix

Compare local competitors across key metrics: reviews, ratings, categories, and citation count. Visual matrix with gap analysis.

Local Content Idea Generator

Generate local content ideas based on your business type and location. Templates for events, news, guides, and community-focused content.

Business Hours Schema Tool

Configure business hours with holiday exceptions and generate OpeningHoursSpecification schema. Preview the hours display format.

Local SEO Audit Checklist

Interactive local SEO audit checklist with 50+ items across GBP, on-page, citations, reviews, and technical categories. Track completion percentage.

Review Generation QR Builder

Create QR codes that link directly to your Google, Yelp, or Facebook review pages. Customize with logo and colors for print materials.

Google Ads Budget Calculator

Calculate daily and monthly Google Ads budgets from target clicks, CPC estimates, and conversion rates. Forecast ROI with multiple scenarios.

Quality Score Optimizer

Analyze Google Ads Quality Score components: expected CTR, ad relevance, and landing page experience. Get improvement recommendations.

Ad Copy Variations Builder

Create multiple ad copy variations from headlines and descriptions. Generate all permutations and preview responsive search ad combinations.

Negative Keyword Builder

Build and manage negative keyword lists for Google Ads. Import search terms, categorize negatives, and export formatted lists.

Ad Extensions Builder

Build sitelink, callout, structured snippet, and price extensions for Google Ads. Preview all extension types in a realistic ad format.

PPC Competitor Analyzer

Compare PPC strategies across competitors. Enter ad data to analyze position, copy patterns, extensions, and estimated spend.

Landing Page Relevance Scorer

Score landing page content relevance against ad keywords and copy. Check message match, CTA alignment, and content-to-ad consistency.

Ad Schedule Planner

Plan ad scheduling with a weekly heatmap grid. Set bid adjustments by hour and day, and visualize coverage against target audience activity.

Search Term Categorizer

Upload Google Ads search term reports and categorize terms by theme, intent, and performance. Identify new keyword and negative keyword opportunities.

Display Ad Size Previewer

Preview display ads in all standard IAB sizes. Upload images or enter text to see how ads render across leaderboard, rectangle, and skyscraper formats.

Ad Spend ROAS Calculator

Calculate Return on Ad Spend from revenue and cost data. Compare ROAS across campaigns, set targets, and visualize performance trends.

Keyword Match Type Tool

Visualize how broad, phrase, and exact match types affect keyword targeting in Google Ads. See which queries would trigger each match type.

Ad Strength Checker

Evaluate responsive search ad strength based on headline diversity, description uniqueness, and keyword inclusion. Mirrors Google Ads scoring.

PPC Bid Simulator

Simulate bid adjustments and their impact on impressions, clicks, and cost. Visualize the bid-to-position curve with diminishing returns analysis.

Conversion Tracking Debugger

Debug conversion tracking setups. Validate Google Ads conversion tags, event parameters, and attribution windows with a visual flow diagram.

Facebook Ad Preview Builder

Build and preview Facebook ad creatives for feed, stories, reels, and right column placements. Check image ratios and text overlay limits.

Instagram Post Previewer

Preview Instagram posts, stories, reels, and carousel layouts. Check caption length, hashtag count, and image aspect ratios.

Hashtag Research Tool

Enter a topic and generate categorized hashtag sets: popular, niche, branded, and community. Export hashtag groups for different post types.

Social Post Calendar Planner

Plan social media posts on a visual calendar. Schedule content across platforms with best-time suggestions and bulk import from CSV.

Social Engagement Rate Tool

Calculate engagement rates across platforms using likes, comments, shares, and followers. Compare rates against industry benchmarks.

Influencer Pricing Estimator

Calculate fair influencer rates based on follower count, engagement rate, and platform. Compare across nano, micro, and macro tiers.

Social Media Bio Generator

Create optimized social media bios for Instagram, Twitter, LinkedIn, and TikTok with character limits, keyword inclusion, and CTA suggestions.

Social Proof Widget Builder

Build social proof notification widgets with customizable templates. Create "X people viewed this" and "Recently purchased" notification popups.

TikTok Post Previewer

Preview TikTok video posts with caption, hashtags, and audio label. Check text overlay safe zones and character limits for descriptions.

YouTube Thumbnail Tester

Upload thumbnails and preview them in YouTube search results, suggested videos, and homepage. Compare multiple thumbnails side by side.

YouTube Tag Generator

Generate optimized YouTube tags from video topics. Combine primary, secondary, and long-tail tags with character limit tracking.

YouTube Description Builder

Build structured YouTube descriptions with timestamps, links, credits, and hashtags. Template system with above-the-fold optimization.

Social Media Analytics Dashboard

Enter social media metrics and visualize performance in a unified dashboard. Track followers, engagement, reach, and growth across platforms.

Facebook Audience Overlap Tool

Estimate audience overlap between Facebook ad targeting options. Venn diagram visualization helps optimize audience segmentation and exclusions.

Social Ad ROI Calculator

Calculate social advertising ROI across Facebook, Instagram, LinkedIn, and TikTok. Compare CPM, CPC, CPA, and ROAS by platform.

Pinterest Pin Previewer

Preview standard pins, idea pins, and product pins as they appear in Pinterest feeds. Check aspect ratios, text overlay, and description formatting.

Social Caption Generator

Generate engaging captions for social media posts using templates. Customize tone, include CTAs, and adapt length per platform.

Brand Voice Consistency Checker

Define your brand voice guidelines and check content against them. Analyze tone, vocabulary, and style with consistency scoring.

Social Media Contest Builder

Plan social media contests with rule templates, entry tracking, and random winner selection. Generate official rules and entry forms.

Influencer Campaign Tracker

Track influencer marketing campaigns with deliverable timelines, content approvals, and performance metrics. Dashboard with cost-per-engagement.

Email Spam Score Checker

Analyze email content for spam trigger words, formatting issues, and deliverability red flags. Score with improvement suggestions.

Email Preheader Optimizer

Optimize email preheader text with length validation. Preview how subject line and preheader appear together across Gmail, Outlook, and Apple Mail.

Email A/B Test Calculator

Calculate required sample size and statistical significance for email A/B tests. Input open rates, click rates, and confidence levels.

Email Send Time Optimizer

Analyze subscriber time zones and suggest optimal send times. Heatmap visualization of best days and hours based on industry benchmarks.

Email Dark Mode Previewer

Preview how your HTML email renders in dark mode across Gmail, Outlook, and Apple Mail. Identify color inversion issues and fix suggestions.

Email List Health Checker

Analyze email list quality from a CSV upload. Check format validity, detect role addresses, disposable domains, and duplicate entries.

Email Template Builder

Build responsive HTML email templates with a visual drag-and-drop editor. Export clean HTML compatible with major email service providers.

Email CTA Button Generator

Generate bulletproof HTML email buttons that work in Outlook. Customize colors, borders, padding, and corner radius with live preview.

Email Unsubscribe Rate Tracker

Track unsubscribe rates over time with campaign tagging. Benchmark against industry averages and identify content that drives unsubscribes.

Drip Campaign Planner

Plan email drip sequences with a visual flow builder. Define triggers, delays, and conditional branches for automated nurture campaigns.

Email Personalization Tester

Test email personalization with merge tag preview. Enter sample data and see how dynamic fields render across multiple subscriber profiles.

Email Warmup Calculator

Calculate email domain warmup schedules for new sending domains. Generate daily volume ramp-up plans with ISP-specific recommendations.

Newsletter ROI Calculator

Calculate newsletter ROI from subscriber count, open rates, click rates, and revenue per click. Track monthly revenue and subscriber lifetime value.

Email Compliance Checker

Check email content for CAN-SPAM, GDPR, and CASL compliance. Validate unsubscribe links, physical address, sender info, and consent language.

A/B Test Significance Calculator

Calculate statistical significance for A/B test results. Input visitors, conversions, and confidence level to determine if results are reliable.

A/B Test Duration Calculator

Calculate how long to run an A/B test based on traffic, baseline conversion rate, and minimum detectable effect. Avoid stopping tests too early.

Landing Page Builder

Build landing page layouts with a drag-and-drop visual editor. Choose from templates optimized for lead generation, SaaS, and e-commerce.

CTA Button Tester

Test CTA button variations with different colors, text, sizes, and placement. Compare designs and get conversion optimization suggestions.

Scroll Depth Simulator

Simulate scroll depth tracking on page layouts. Enter percentage data to visualize where users stop scrolling with engagement bands.

Funnel Visualization Builder

Build conversion funnels with custom stages. Enter visitor counts per stage and visualize drop-off rates with an interactive funnel chart.

Form Field Optimizer

Analyze form fields for conversion optimization. Score field count, types, labels, and required vs optional balance with reduction suggestions.

Exit Intent Popup Builder

Design exit intent popup templates with customizable layouts, offers, and countdown timers. Preview on different screen sizes.

Pricing Page Tester

Test pricing page layouts with different tier arrangements, feature comparisons, and CTA placements. A/B test pricing presentations visually.

Testimonial Widget Builder

Build testimonial display widgets with carousel, grid, and masonry layouts. Add photos, ratings, and company logos for credibility.

Multivariate Test Planner

Plan multivariate tests by defining variables and levels. Calculate total combinations, required traffic, and test duration estimates.

Conversion Rate Benchmarker

Compare your conversion rates against industry benchmarks by sector and page type. Visual gauge shows where you stand and improvement targets.

GA4 Event Builder

Build custom GA4 event tracking code with event names and parameters. Generate gtag.js and dataLayer push snippets with validation.

GTM Tag Builder

Build Google Tag Manager container configurations. Create tags, triggers, and variables with a visual editor and export as JSON.

UTM Parameter Decoder

Paste URLs and extract UTM parameters into a readable table. Batch decode campaign tracking links and export organized campaign data.

Rank Tracking Spreadsheet

Track keyword rankings over time in an interactive spreadsheet. Log positions, URLs, and dates with trend charts and movement alerts.

Traffic Forecast Tool

Forecast organic traffic based on keyword rankings and search volumes. Model scenarios with different ranking improvements and seasonal trends.

Channel Attribution Modeler

Model marketing channel attribution with first-touch, last-touch, linear, time-decay, and position-based models. Compare revenue allocation.

Bounce Rate Analyzer

Analyze bounce rates by page type, traffic source, and device. Benchmark against industry averages and identify high-bounce pages for optimization.

Goal Value Calculator

Calculate the monetary value of website goals and micro-conversions. Assign values to newsletter signups, form fills, and page views.

Cohort Retention Analyzer

Build cohort analysis tables from user data. Visualize retention, engagement, and revenue by acquisition cohort with heatmap coloring.

Custom Dimension Planner

Plan GA4 custom dimensions and metrics. Map business data to analytics properties with scope, format, and implementation code generation.

Looker Studio Query Helper

Build calculated fields, CASE statements, and RegEx formulas for Looker Studio (Data Studio). Preview results with sample data.

Marketing KPI Tracker

Track marketing KPIs across channels with customizable dashboards. Set targets, visualize progress, and generate weekly/monthly summaries.

Consent Mode Tester

Test Google Consent Mode v2 configurations. Simulate different consent states and see how they affect analytics and ad tag behavior.

Affiliate Link Manager

Manage affiliate links with a searchable database. Track link destinations, networks, and commission rates. Export organized link lists.

Affiliate Commission Calculator

Calculate affiliate commissions across different rate structures: percentage, flat fee, tiered, and recurring. Forecast monthly earnings.

Product Feed Validator

Validate product feed files (CSV/XML) against Google Merchant Center requirements. Check required fields, formats, and image URL validity.

Product Description Optimizer

Score and optimize product descriptions for SEO. Check keyword usage, readability, unique selling points, and length against best practices.

RSS Feed Builder

Build valid RSS 2.0 and Atom feeds from entered content items. Add titles, descriptions, dates, and links with XML output validation.

Webinar Landing Page Scorer

Score webinar registration pages for conversion best practices. Check headline, speaker bios, agenda, urgency elements, and form design.

Competitive SERP Analyzer

Analyze SERP competition by entering ranking URLs and their metrics. Score competition level with content gap identification and opportunity mapping.

Productivity & Time (268)

Checklist Maker

Create customizable checklists with groups, due dates, and priorities for any project.

Daily Planner Creator

Design a printable daily planner with time blocks, goals, and priority sections.

Typing Speed Test

Measure your typing speed in WPM and accuracy with real-time feedback and stats.

Focus Timer with Ambient Sounds

Pomodoro timer with built-in ambient noise (rain, cafe, forest) generated via Web Audio API oscillators.

Pomodoro Timer

Stay focused with a customizable Pomodoro timer featuring work and break intervals.

Stopwatch

A precise stopwatch with lap tracking, split times, and exportable results.

Countdown Timer

Set a countdown timer for events, deadlines, or presentations with audio alerts.

World Clock & Timezone Converter

View current times across multiple timezones and convert between them instantly.

Meeting Cost Calculator

Calculate the real cost of meetings based on attendee count, salaries, and duration.

Habit Tracker

Track daily habits with streaks, completion rates, and visual progress charts.

Random Decision Maker / Wheel Spinner

Spin a customizable wheel or flip a coin to make random decisions quickly.

Time Zone Meeting Planner

Select participants' timezones and find overlapping business hours. Interactive visual timeline for scheduling.

Screen Ruler

On-screen pixel ruler to measure anything on the page. Horizontal and vertical guides with draggable positioning.

Image Gallery Layout Planner

Plan responsive image gallery layouts with grid, masonry, and carousel previews.

Clipboard History Manager

Track clipboard copies during your session. Search, re-copy, and organize snippets using the Clipboard API.

Printable Grid Paper Generator

Generate and print custom grid paper (square, isometric, dot grid, hex grid) with configurable spacing.

Graph Paper Maker

Create printable graph paper with customizable grid size, line weight, margins, and color options.

Lined Paper Generator

Generate printable lined paper with adjustable line spacing, margins, and ruled/college/wide options.

Digital Protractor & Ruler

On-screen protractor for measuring angles and ruler for measuring distances in images or on screen.

Presentation Slide Maker

Create simple presentation slides with title, content, image layouts, and slide transitions for export.

Burndown Chart Generator

Create sprint burndown and burnup charts from story point data with ideal trend lines.

Printable Calendar Designer

Design custom printable calendars with monthly/weekly/yearly views, events, and color themes.

Schedule Template Maker

Create printable weekly and monthly schedule templates with customizable time slots and categories.

Resume / CV Builder

Build professional resumes with multiple layout templates, sections, and print-ready formatting.

White Noise Generator

Generate white, pink, and brown noise for focus, sleep, and sound masking.

Online Metronome

Adjustable metronome with BPM control, time signature, and accent patterns.

Screen Recorder

Record screen, window, or tab with audio using browser MediaRecorder API.

Webcam Recorder

Record video from webcam with optional microphone audio and mirror preview.

Certificate Generator

Create customizable certificates and awards with templates, text, and borders.

Soundboard Creator

Create custom soundboards with uploaded audio clips and hotkey triggers.

Online Alarm Clock

Set multiple alarms with custom labels, repeat options, and notification sounds using Web Audio API.

Break Reminder Timer

Configurable break reminder that notifies you to stand, stretch, or rest your eyes at set intervals.

Focus Mode / Site Blocker

Block distracting websites during focus sessions with a configurable blocklist and session timer.

Ambient Sound Mixer

Mix and layer ambient sounds like rain, thunder, wind, birds, and cafe chatter with individual volume sliders.

Online Metronome

Precise metronome with adjustable BPM, time signatures, accent patterns, and tap-tempo using Web Audio API.

Tabata / Interval Timer

Customizable interval timer for Tabata, HIIT, and circuit training with audio cues and round tracking.

Goal Tracker

Set and track personal and professional goals with milestones, progress bars, and deadline countdowns.

To-Do List App

Simple to-do list with priorities, due dates, categories, and drag-and-drop reordering saved locally.

Weekly Planner

Plan your week with a 7-day grid view, time blocks, and recurring event support with local persistence.

Work Hours Calculator

Calculate total work hours from clock-in and clock-out times with break deductions and overtime tracking.

Time Card Calculator

Enter daily start and end times for a week and calculate total hours, overtime, and pay automatically.

Calendar View / Event Planner

Interactive monthly and weekly calendar with event creation, color-coded categories, and local storage.

Date Countdown / Event Countdown

Count down to any future date with days, hours, minutes, and seconds display and shareable countdown links.

Day Counter / Days Since

Track how many days have passed since a specific date, useful for streaks, milestones, and anniversaries.

Time Tracker / Task Timer

Track time spent on tasks with start/stop controls, project categories, and exportable time logs.

Reading Time Calculator

Paste text or set word count to estimate reading and speaking time at adjustable speeds.

Presentation Timer

Full-screen countdown timer for presentations with color-coded warnings and customizable time segments.

Chess Clock / Game Timer

Two-player chess clock with multiple time control modes including Fischer, Bronstein, and simple delay.

Sleep Calculator

Calculate optimal sleep and wake times based on 90-minute sleep cycles for better rest quality.

Screen Time Tracker

Track how long the current browser tab has been active with daily totals and session history.

Daily Journal

Write daily journal entries with timestamps, mood tracking, and searchable history stored locally.

Gratitude Journal

Log daily gratitudes with date stamps, review streaks, and browse past entries from local storage.

Screenshot Capture Tool

Capture screenshots of visible tab content or selected areas with annotation tools and instant download.

Meeting Notes Template

Structured meeting notes with attendees, agenda items, action items, and decisions fields with auto-timestamps.

Event Countdown Widget

Create beautiful countdown widgets for events with customizable styles, backgrounds, and embeddable code.

Water Intake Tracker

Track daily water consumption with glass-filling animation, reminders, and streak tracking.

Weekly Meal Planner

Plan meals for the week with breakfast, lunch, dinner, and snack slots with grocery list generation.

Pomodoro Statistics Dashboard

Track Pomodoro sessions over days and weeks with productivity charts, focus scores, and streak counters.

Reading List / Bookshelf Tracker

Track books you want to read, are reading, and have finished with ratings and notes stored locally.

Birthday Reminder List

Store birthdays with names and dates, sorted by upcoming, with age calculation and countdown display.

Packing List Maker

Create travel packing lists with categories, checkboxes, weather suggestions, and reusable templates.

Pros and Cons List

Create weighted pros and cons lists with importance scores and a visual balance comparison chart.

Focus Music Player

Looping ambient music player with lo-fi, classical, and nature categories synced to focus timer sessions.

Habit Streak Calendar

Visual calendar showing daily habit completion with GitHub-style contribution heatmap and streak counters.

Meditation Timer

Customizable meditation timer with interval bells, ambient background sounds, and session history logging.

Breathing Exercise Timer

Guided breathing exercises (4-7-8, box breathing, Wim Hof) with animated visual guide and cycle counting.

20-20-20 Eye Break Timer

Reminds you every 20 minutes to look at something 20 feet away for 20 seconds to reduce eye strain.

Desk Stretch Break Timer

Periodic reminders with illustrated desk stretches and exercises to prevent repetitive strain injuries.

World Clock Dashboard

Display analog and digital clocks for multiple cities simultaneously with daylight/nighttime indicators.

Gratitude Prompt Generator

Get daily gratitude prompts with categories for relationships, achievements, experiences, and growth.

30-Day Challenge Tracker

Track 30-day challenge progress with daily checkboxes, streak counter, and completion certificate.

Morning Routine Builder

Build a timed morning routine with sequential tasks, duration allocation, and daily completion tracking.

Bulk URL Opener

Open multiple URLs at once in new browser tabs from a list for batch website checking and review.

Daily Journal App

Write daily journal entries with mood tracking, tags, and search. All entries stored locally in your browser.

Volume & Liquid Converter

Convert between liters, gallons, cups, milliliters, fluid ounces, tablespoons, and more.

Pressure Unit Converter

Convert between PSI, bar, atm, Pascal, mmHg, and other pressure units instantly.

Energy Unit Converter

Convert joules, calories, BTU, kilowatt-hours, electron volts, and foot-pounds.

Power Converter

Convert between watts, horsepower, BTU/hr, kilowatts, and foot-pounds per second.

Torque Converter

Convert newton-meters, foot-pounds, inch-pounds, kilogram-force meters, and dyne-cm.

Fuel Economy MPG Converter

Convert MPG, L/100km, km/L, and miles per imperial gallon for any vehicle.

Kitchen Measurement Converter

Convert cups, tablespoons, teaspoons, milliliters, ounces, and grams for recipes.

Fabric Yardage Converter

Convert between fabric widths (45", 54", 60") and calculate yardage for different bolt sizes.

Paper Size Converter

Compare and convert A-series, B-series, US Letter, Legal, Tabloid, and custom paper sizes.

Frequency Converter

Convert hertz, kilohertz, megahertz, gigahertz, RPM, and radians per second.

Angle & Radian Converter

Convert degrees, radians, gradians, arc minutes, arc seconds, and turns.

Density Converter

Convert kg/mยณ, g/cmยณ, lb/ftยณ, lb/gal, and other density units for materials.

Flow Rate Converter

Convert gallons per minute, liters per second, cubic feet per hour, and other flow rates.

Illuminance Converter

Convert lux, foot-candles, phot, and nox for lighting design and photography.

Force Converter

Convert newtons, pounds-force, dynes, kilogram-force, and kips with precision.

Time Duration Unit Converter

Convert milliseconds, seconds, minutes, hours, days, weeks, months, and years precisely.

Viscosity Converter

Convert centipoise, pascal-second, stokes, and SAE grades for fluids and oils.

Magnetic Field Converter

Convert tesla, gauss, oersted, and ampere per meter for magnetic field calculations.

Radioactivity Converter

Convert becquerel, curie, rutherford, and disintegrations per second for radiation measurements.

International Shoe Size Converter

Convert shoe sizes between US, UK, EU, and centimeter systems for men, women, and kids.

Online Alarm Clock

Set multiple alarms with custom labels, snooze intervals, and alarm sounds in your browser.

Interval Timer

Create custom work/rest intervals for HIIT, Tabata, circuit training, and study sessions.

Event Countdown

Create beautiful countdown timers to holidays, birthdays, launches, and milestones.

Week Number Calendar

View ISO week numbers for any year with holiday highlights and quarter boundaries.

Time Duration Calculator

Add and subtract hours, minutes, and seconds to calculate total durations and elapsed time.

Work Hours Tracker

Log daily clock-in and clock-out times, track overtime, and calculate weekly totals.

Sunrise & Sunset Calculator

Calculate sunrise, sunset, golden hour, and blue hour times for any location and date.

Year Progress Tracker

Visualize how much of the current year, quarter, month, and week has elapsed.

Shift Schedule Planner

Create rotating shift schedules for teams with day, swing, and night shift patterns.

Weekly Time Card Calculator

Calculate weekly pay from daily time entries with overtime rules and break deductions.

Meeting Scheduler

Find overlapping availability across multiple participants and time zones.

Unix Timestamp Tool

Convert Unix timestamps to human-readable dates and back with millisecond precision.

Moon Phase Calendar

View moon phases, full moon dates, new moon dates, and lunar cycles for any month.

Multi Timer

Run multiple named timers simultaneously for cooking, workouts, or project tracking.

Daily Calorie Calculator

Estimate daily caloric needs based on age, weight, height, activity level, and goals.

Macro Nutrient Calculator

Calculate optimal protein, carb, and fat ratios for cutting, bulking, or maintenance.

Water Intake Tracker

Track daily water intake, set hydration goals, and get reminders based on your body weight.

Sleep Cycle Calculator

Calculate optimal bedtimes and wake times based on 90-minute sleep cycles.

One Rep Max Calculator

Estimate your 1RM for any lift using Epley, Brzycki, and Lombardi formulas.

Running Pace Calculator

Calculate pace, speed, finish time, and splits for 5K, 10K, half marathon, and marathon.

Calorie Burn Calculator

Estimate calories burned during 100+ activities based on duration, weight, and intensity.

Body Fat Percentage Calculator

Estimate body fat percentage using Navy, BMI, and skinfold methods with visual guides.

Pregnancy Due Date Estimator

Calculate estimated due date, trimester timeline, and key milestones from LMP or conception.

Heart Rate Zone Calculator

Calculate training heart rate zones using Karvonen method for fat burn, cardio, and peak.

Waist-to-Hip Ratio Calculator

Calculate waist-to-hip ratio and assess health risk categories with visual indicators.

Blood Alcohol Calculator

Estimate blood alcohol content based on drinks, weight, gender, and time elapsed.

Ideal Weight Calculator

Calculate ideal weight range using Devine, Robinson, Miller, and Hamwi formulas.

Breathing Exercise Timer

Guided breathing patterns for box breathing, 4-7-8, and Wim Hof with visual animations.

Workout Rep Counter

Track exercise sets, reps, and rest periods with audio cues and workout logging.

Stretching Routine Builder

Build custom stretching routines with hold timers, body part targeting, and visual guides.

Lean Body Mass Calculator

Calculate lean body mass and fat-free mass using the Boer, James, and Hume formulas.

Protein Intake Calculator

Calculate daily protein needs based on body weight, activity level, and fitness goals.

VO2 Max Estimator

Estimate VO2 max from running times, Cooper test, or resting heart rate methods.

Steps to Distance Converter

Convert daily steps to distance walked in miles or kilometers based on stride length.

Paint Calculator

Calculate how much paint you need based on room dimensions, coats, and door/window cutouts.

Flooring Calculator

Calculate flooring material needed in square feet or meters with waste factor for tile, hardwood, or laminate.

Wallpaper Calculator

Calculate rolls of wallpaper needed for any room with pattern repeat and obstacle adjustments.

Room Area Calculator

Calculate square footage for rectangular, L-shaped, and irregular rooms with visual layout.

Furniture Layout Planner

Drag and drop furniture pieces onto a room grid to plan layouts before moving day.

Curtain & Blinds Calculator

Calculate curtain width, length, and fabric needed based on window measurements and fullness.

Tile Pattern Layout

Visualize herringbone, brick, basketweave, and diagonal tile patterns for your floor or wall.

Staircase Calculator

Calculate rise, run, number of steps, stringer length, and headroom for safe stairs.

Fence Material Calculator

Calculate posts, rails, pickets, and concrete needed for wood, vinyl, or chain-link fencing.

Deck Board Calculator

Calculate decking boards, joists, screws, and concrete footings for your deck project.

Appliance Electricity Cost Calculator

Calculate monthly and yearly electricity costs for appliances based on wattage and usage hours.

Moving Box Calculator

Estimate how many boxes and packing supplies you need based on home size and rooms.

Concrete Calculator

Calculate cubic yards or bags of concrete for slabs, footings, columns, and walls.

Gravel & Mulch Calculator

Calculate tons of gravel or cubic yards of mulch needed for paths, beds, and driveways.

Lighting Layout Planner

Plan recessed light spacing and placement based on room size, ceiling height, and lumen needs.

Packing List Generator

Generate smart packing lists based on destination, trip length, weather, and activities.

Flight Time Calculator

Estimate flight duration between cities accounting for distance, wind, and layover time.

Jet Lag Calculator

Plan light exposure and sleep schedules to minimize jet lag when crossing time zones.

Distance Between Cities

Calculate the straight-line and driving distance between any two cities worldwide.

Travel Budget Planner

Plan trip expenses for flights, hotels, food, activities, and transportation with daily breakdowns.

Luggage Weight Checker

Check carry-on and checked baggage weight limits for major airlines and calculate fees.

Road Trip Fuel Planner

Calculate total fuel cost for a road trip based on distance, MPG, and gas prices.

Travel Checklist Builder

Create comprehensive pre-trip checklists for documents, electronics, toiletries, and more.

International Clothing Size Converter

Convert clothing sizes between US, UK, EU, and Asian sizing for shirts, pants, and dresses.

Vacation Day Calculator

Optimize PTO usage by finding the best days to take off around weekends and holidays.

World Power Plug Guide

Find the correct power plug type, voltage, and frequency for any country.

Tipping Etiquette Guide

Look up tipping customs, expected percentages, and etiquette for countries worldwide.

Travel Itinerary Builder

Build a day-by-day travel itinerary with activities, locations, notes, and time slots.

Driving Time Calculator

Estimate driving time between two points with rest stop scheduling and speed adjustments.

Time Zone Converter

Convert any time between multiple time zones simultaneously with DST awareness.

Fuel Cost Calculator

Calculate gas or diesel costs per trip, week, month, or year based on commute and MPG.

Car Maintenance Scheduler

Track oil changes, tire rotations, brake inspections, and other maintenance by mileage intervals.

Tire Size Calculator

Compare tire sizes, calculate speedometer differences, and find plus-size fitments.

Engine Horsepower Calculator

Estimate engine horsepower from quarter-mile time, dyno data, or displacement formulas.

Auto Loan Payment Calculator

Calculate monthly payments, total interest, and amortization for auto loans.

EV Charging Calculator

Calculate charging time, electricity cost, and range for Level 1, Level 2, and DC fast charging.

Car Depreciation Calculator

Estimate vehicle depreciation over time and calculate future resale value by year.

Towing Capacity Checker

Check if your vehicle can safely tow a trailer based on GVWR, tongue weight, and payload.

Gas vs Electric Cost Comparison

Compare total ownership costs of gas vs electric vehicles including fuel, maintenance, and insurance.

Recipe Ingredient Scaler

Scale recipe ingredients up or down by servings or multiplier with automatic unit conversion.

Ingredient Substitution Finder

Find ingredient substitutions for allergies, dietary needs, or missing pantry items.

Oven Temperature Converter

Convert between Fahrenheit, Celsius, gas mark, and fan-assisted oven temperatures.

Cooking Timer Set

Run multiple labeled kitchen timers simultaneously for different dishes and courses.

Meat Cooking Temperature Guide

Reference internal temperatures for beef, pork, poultry, and seafood by doneness level.

Baking Pan Size Converter

Convert batter volumes between round, square, and rectangular pans of different sizes.

Yeast Conversion Calculator

Convert between active dry yeast, instant yeast, fresh yeast, and sourdough starter amounts.

Meal Prep Planner

Plan weekly meals, generate grocery lists, and schedule prep times for batch cooking.

Butter & Fat Converter

Convert between sticks, cups, tablespoons, grams, and ounces for butter, oil, and fats.

Egg Size Converter

Convert egg quantities between small, medium, large, XL, and jumbo sizes for recipes.

Flour Weight Converter

Convert cups to grams for all-purpose, bread, cake, whole wheat, and gluten-free flours.

Slow Cooker Time Converter

Convert oven recipes to slow cooker times and vice versa with temperature adjustments.

Caffeine Intake Tracker

Track daily caffeine from coffee, tea, soda, and energy drinks with half-life visualization.

Knitting Gauge Calculator

Calculate stitch and row counts from gauge swatches to resize knitting patterns.

Yarn Yardage Calculator

Estimate yarn needed for scarves, blankets, and sweaters based on project dimensions.

Seam Allowance Calculator

Calculate pattern piece sizes with seam allowance adjustments for garments and quilts.

Cross Stitch Pattern Grid

Create custom cross stitch grids with color palettes and stitch count calculations.

Board Foot Calculator

Calculate board feet of lumber from thickness, width, and length for woodworking projects.

Miter Angle Calculator

Calculate miter and bevel angles for picture frames, crown molding, and polygon joints.

Quilt Fabric Calculator

Calculate fabric yardage for quilt blocks, sashing, borders, and backing by quilt size.

Crochet Hook & Yarn Guide

Match crochet hook sizes (US, metric, UK) to yarn weights with gauge recommendations.

Wood Joint Reference Guide

Browse wood joint types with strength ratings, difficulty levels, and use case recommendations.

Bead Count Calculator

Calculate the number of beads needed for bracelets, necklaces, and other jewelry projects.

Metronome with Tap Tempo

A precise metronome with adjustable BPM, time signatures, accent patterns, and tap tempo.

Chromatic Guitar Tuner

Tune your guitar using your microphone with visual pitch detection for standard and alternate tunings.

Guitar Chord Chart

Browse and display guitar chord diagrams for major, minor, 7th, and extended chords.

Music Scale Finder

Explore major, minor, pentatonic, blues, and modal scales with note displays and audio playback.

BPM Tap Counter

Tap to the beat to detect the tempo of any song in beats per minute.

Music Interval Trainer

Practice identifying musical intervals by ear with audio playback and scoring.

Key Signature Reference

View sharps, flats, and relative minor/major keys for all 15 key signatures.

Circle of Fifths Explorer

Interactive circle of fifths diagram showing keys, chords, and harmonic relationships.

Piano Chord Player

Play chords and notes on a virtual piano keyboard with sustain and octave selection.

Song Key Finder

Identify the musical key of a song by selecting the chords used in the progression.

Drum Pattern Sequencer

Create and play drum patterns with kick, snare, hi-hat, and percussion on a step sequencer.

Note Frequency Chart

Reference table of musical note frequencies across all octaves in Hz with A4 calibration.

RPG Dice Roller

Roll standard and custom dice (d4, d6, d8, d10, d12, d20, d100) with 3D animation and history.

Card Shuffler & Dealer

Shuffle a standard 52-card deck and deal hands for poker, blackjack, or custom card games.

Game Score Tracker

Track scores for multiple players across rounds with running totals and winner highlights.

Tournament Bracket Maker

Generate single or double elimination brackets for 4 to 64 players or teams.

Team Randomizer

Randomly split a list of players into balanced teams for sports, games, or group work.

Spin the Wheel

Create a custom spinning wheel with labeled wedges for random selection and game shows.

Bingo Card Generator

Generate printable bingo cards with custom words, numbers, or images for game nights.

Virtual Coin Flipper

Flip a virtual coin with animation and track heads/tails statistics over multiple flips.

Chess Game Clock

A two-player chess clock with increment, delay, and multiple time control presets.

Random Number Picker

Pick random numbers within a range with options for no repeats, quantity, and lottery presets.

Character Name Generator

Generate character names by genre, origin, and style for fiction, RPGs, and screenwriting.

Plot Idea Generator

Generate random plot premises with protagonist, conflict, and setting combinations.

Chapter Outline Planner

Plan book chapters with scene breakdowns, POV tracking, and word count targets.

Dialogue Formatter

Format screenplay and novel dialogue with proper punctuation, attribution, and style guides.

Writing Statistics Dashboard

Analyze text for sentence length, paragraph count, reading time, syllable count, and vocabulary level.

Rhyme Finder

Find perfect rhymes, near rhymes, and slant rhymes for songwriting and poetry.

Word Count Goal Tracker

Track daily word counts against a target with progress charts and streak tracking.

Screenplay Formatter

Format text into industry-standard screenplay format with scene headings, action, and dialogue.

Story Structure Planner

Plan stories using three-act, Hero Journey, Save the Cat, or Freytag pyramid structures.

World Building Template

Organize fictional world details including geography, cultures, magic systems, and history.

Photography Exposure Calculator

Calculate equivalent exposures with aperture, shutter speed, and ISO adjustments.

Depth of Field Calculator

Calculate depth of field, hyperfocal distance, and near/far focus limits for any lens.

Golden Ratio Overlay

Apply golden ratio, golden spiral, and phi grid overlays to uploaded images for composition.

Rule of Thirds Grid

Overlay a rule-of-thirds grid on uploaded images to analyze and improve composition.

Photo Print Size Calculator

Calculate maximum print size at 300 DPI from image resolution with aspect ratio previews.

ND Filter Calculator

Calculate shutter speed with ND filters (1-15 stops) for long exposure photography.

Field of View Calculator

Calculate horizontal, vertical, and diagonal field of view for any focal length and sensor.

Photo Aspect Ratio Cropper

Crop photos to standard aspect ratios (4:3, 16:9, 1:1, 3:2) for print and social media.

Photo EXIF Shutter Count

Extract shutter count and detailed EXIF data from camera photos to check actuations.

Time Lapse Calculator

Calculate interval, frame count, shooting duration, and final video length for time-lapse projects.

Plant Spacing Calculator

Calculate how many plants fit in a garden bed with row, grid, and hexagonal spacing options.

Soil Amendment Calculator

Calculate how much compost, peat moss, or fertilizer to add based on bed size and soil type.

USDA Growing Zone Finder

Find your USDA hardiness zone by ZIP code with frost dates and planting season info.

Seed Starting Calendar

Generate a seed starting schedule based on frost dates and plant-specific timing.

Raised Bed Soil Calculator

Calculate cubic feet of soil mix needed to fill raised garden beds of any shape.

Watering Schedule Planner

Create plant-specific watering schedules adjusted for season, soil type, and climate.

Garden Bed Layout Planner

Design garden bed layouts with companion planting suggestions and crop rotation tracking.

Compost Ratio Calculator

Balance green-to-brown ratios for optimal composting with material weight and volume inputs.

Lawn Fertilizer Calculator

Calculate the right amount of fertilizer for your lawn based on area, grass type, and NPK ratio.

Garden Sunlight Tracker

Log and track sun exposure hours in garden zones to match plants with ideal light conditions.

Pet Age Calculator

Calculate your dog or cat age in human years using breed-specific aging curves.

Pet Feeding Calculator

Calculate daily food portions for dogs and cats based on weight, age, and activity level.

Pet Weight Tracker

Track your pet weight over time with growth charts and ideal weight range indicators.

Pet Vaccination Scheduler

Track and schedule vaccinations, boosters, and vet appointments for dogs and cats.

Dog Breed Size Guide

Browse dog breeds by size category with adult weight ranges and exercise requirements.

Aquarium Volume Calculator

Calculate water volume for rectangular, bowfront, and cylindrical aquariums in gallons and liters.

LED Resistor Calculator

Calculate the correct resistor value for LEDs based on supply voltage, forward voltage, and current.

Battery Life Calculator

Estimate battery runtime from capacity (mAh), load current, and efficiency factor.

Capacitor Calculator

Calculate capacitance in series and parallel, RC time constants, and energy storage.

Wire Gauge Calculator

Find the correct AWG wire gauge for current, distance, and voltage drop requirements.

PCB Trace Width Calculator

Calculate PCB trace width for target current based on copper thickness and temperature rise.

Voltage Divider Calculator

Calculate output voltage and resistor values for voltage divider circuits.

Inductor Calculator

Calculate inductance for series and parallel inductors, RL time constants, and impedance.

Power Supply Calculator

Calculate total wattage needed for PC components or project power supply sizing.

Planet Position Viewer

View current positions of planets in the solar system with orbital paths and distances.

Telescope Magnification Calculator

Calculate magnification, true field of view, and exit pupil for telescope-eyepiece combinations.

ISS Pass Time Predictor

Calculate when the International Space Station will be visible from your location.

Light Year Distance Calculator

Convert between light years, parsecs, astronomical units, and kilometers for cosmic distances.

Wind Chill Calculator

Calculate wind chill factor from temperature and wind speed with frostbite risk warnings.

Heat Index Calculator

Calculate heat index from temperature and humidity with heat exhaustion risk levels.

Dew Point Calculator

Calculate dew point temperature from air temperature and relative humidity.

Barometric Pressure Converter

Convert between inHg, hPa, mbar, mmHg, and atm with weather condition indicators.

Swimming Pace Calculator

Calculate swim pace per 100m/yd, total time, and split targets for pool and open water.

Cycling Power Calculator

Estimate watts per kilogram, FTP zones, and power-to-weight ratio for cycling performance.

Noise Level Meter

Measure ambient noise levels in decibels using your device microphone with visual gauge.

Color Temperature Converter

Convert between Kelvin color temperature, RGB values, and white balance presets for lighting.

File & Data (42)

File Size Calculator & Converter

Convert between bytes, KB, MB, GB, and TB with precise binary and decimal calculations.

CSV Viewer & Editor

Open, view, and edit CSV files in a spreadsheet-style table with sorting and filtering.

JSON Tree Viewer

Visualize JSON data as a collapsible tree with syntax highlighting and search.

Barcode Generator

Generate Code 128, EAN, UPC, and other barcode formats with customizable size and labels.

Data URL / Base64 Image Converter

Convert images to Base64 data URLs and decode Base64 strings back to images.

.htaccess Redirect Generator

Generate Apache .htaccess redirect rules for 301, 302, and rewrite configurations.

Sitemap XML Generator

Create valid XML sitemaps with priority, change frequency, and last modified dates.

CSV to Chart Preview

Upload CSV data and instantly preview it as bar, line, pie, or scatter charts.

JSON Diff Tool

Upload or paste two JSON files and see a visual tree diff showing added, removed, and changed fields. Collapsible nodes.

EXIF Data Editor

Edit and modify EXIF metadata fields in photos before sharing.

Pixel Counter

Count total pixels and display image dimensions, aspect ratio, and file details.

Image Dimension Checker

Check width, height, DPI, color depth, and file size of multiple images at once.

Audio Metadata Editor

Edit MP3 ID3 tags including title, artist, album, year, and cover art.

BPM Detector

Detect the tempo (beats per minute) of audio files and music tracks.

Audio Spectrum Analyzer

Display real-time frequency spectrum analysis of audio with FFT visualization.

Video Metadata Viewer

View video file metadata including codec, resolution, bitrate, and duration.

Bulk Image Downloader

Drag-drop or paste multiple image URLs to download all images as a ZIP file.

Image Similarity Checker

Compare two images and calculate their visual similarity percentage.

Duplicate Image Finder

Find visually similar and duplicate images from a batch of uploaded photos.

Contact Sheet Maker

Create printable contact sheets from multiple photos with filenames and metadata.

Image Orientation Fixer

Fix image orientation based on EXIF rotation data so photos display correctly.

Image Quality Comparison

Compare image quality at different compression levels with SSIM scoring.

Photo Location Viewer

Extract and display GPS coordinates from photo EXIF data on an interactive map.

Image OCR Text Extractor

Extract text from images using OCR with support for multiple languages.

Handwriting to Text OCR

Convert handwritten notes and documents to editable digital text.

Image Text Overlay Maker

Add styled text captions to images with font, size, color, position, and shadow controls.

Music Listening Stats Visualizer

Paste your music library data and visualize listening habits with genre distribution and top artist charts.

EXIF Data Viewer

Extract and display EXIF metadata from photos including camera settings, GPS location, and timestamps.

File Type Identifier

Identify file types by magic bytes and file signatures regardless of file extension, detecting over 100 formats.

CSV Viewer & Editor

View, sort, filter, and edit CSV files in a spreadsheet-like interface with search and column operations.

Signature Drawing Pad

Draw your signature on a smooth canvas and export as transparent PNG for documents.

Typed Signature Generator

Create elegant typed signatures with script and handwriting-style fonts.

Initials Generator

Create professional initial marks for document signing in various styles.

Document Scanner

Scan documents using your camera with auto-crop, perspective correction, and PDF output.

Image OCR Tool

Extract text from images (JPG, PNG, screenshot) using Tesseract.js OCR in the browser.

Receipt OCR Scanner

Scan receipts with OCR to extract merchant name, date, items, total, and tax.

Business Card Scanner

Scan business cards with your camera, extract contact info via OCR, and save as vCard.

Handwriting OCR Tool

Recognize and extract handwritten text from images and scanned documents.

DOCX File Viewer

View Microsoft Word (.docx) files in your browser without needing Word installed.

PPTX File Viewer

View PowerPoint (.pptx) presentations in your browser with slide navigation.

EPUB eBook Viewer

Read EPUB eBooks in your browser with adjustable fonts, themes, and bookmarks.

ODT File Viewer

View OpenDocument Text (.odt) files in your browser without LibreOffice.

Communication (31)

Email Signature Generator

Create professional HTML email signatures with logos, social links, and custom styling.

Email HTML Previewer

Paste HTML email code and preview it in simulated email client frames (Gmail, Outlook, Apple Mail). Responsive test.

QR Code Business Card

Fill in vCard fields and generate a QR code plus styled digital business card. Download both as images.

HTML Email Builder

Visual drag-and-drop email template builder. Add sections, images, buttons, and export clean HTML code.

Open Graph Tag Generator

Create Open Graph meta tags for perfect social media previews on Facebook, Twitter, and LinkedIn.

Brand Color System Generator

Input one brand color and auto-generate a full color system with shades, tints, semantic colors, and dark mode palette.

Typography Pairing Tool

Browse Google Fonts pairings. Preview heading and body font combos with live sample text. Filter by style.

Responsive Preview Tool

Paste HTML or enter a URL to preview at iPhone, iPad, and desktop viewport sizes side-by-side with real iframe rendering.

Email Banner / Header Image Sizer

Resize and crop images to standard email banner dimensions for all major clients.

Business Card Layout Preview

Preview business card designs with standard dimensions, bleed areas, and safe zones.

Name Tag / Badge Maker

Design and print name tags and event badges with names, titles, logos, and barcode/QR codes.

Table Number Card Maker

Design printable table number cards for events with fonts, colors, and decorative frames.

Invitation Card Maker

Design event invitations with templates for weddings, birthdays, and parties with print-ready export.

Newsletter Template Builder

Design email newsletter layouts with sections, images, and buttons using drag-and-drop with HTML export.

Text to Audio File Converter

Convert text to downloadable audio using Web Speech API with voice selection and playback speed control.

Email Address Validator

Validate email address format with RFC 5322 compliance checking and MX record lookup suggestions.

Phone Number Formatter

Format phone numbers to international, national, and E.164 standards with country code detection.

Formal Letter Template Builder

Build formal and business letters with proper formatting, date, addresses, salutation, and signature block.

Simple Contract Template Builder

Generate basic contract templates with customizable clauses, party details, and signature blocks.

Cover Letter Template Builder

Create cover letters with structured sections, variable insertion, and professional formatting for PDF export.

Thank You Note Generator

Generate personalized thank-you notes for interviews, gifts, and events with tone and format options.

Printable Sign Maker

Create printable signs with large text, borders, and icons for offices, events, and notices.

Envelope Address Formatter

Format mailing addresses for envelope printing with USPS/Royal Mail standards and barcode generation.

Meeting Minutes Template

Create structured meeting minutes with attendees, agenda items, action items, and decisions in exportable format.

Fax Cover Sheet Generator

Create professional fax cover sheets with sender/recipient details, page count, and message area for PDF export.

Address Label Designer

Design custom address labels with fonts, borders, and logos in standard Avery sizes for print-ready PDF export.

Business Memo Template

Create formatted business memos with header, to/from fields, subject, and body with PDF export.

Shipping Label Creator

Design shipping labels with sender/recipient addresses, tracking numbers, and barcodes for printing.

Press Release Template

Build properly formatted press releases with headline, dateline, body, and boilerplate sections.

RSVP Form Builder

Create printable RSVP cards for events with guest name, attendance, meal choice, and dietary options.

Complaint Letter Builder

Build structured complaint letters with issue description, timeline, evidence references, and desired resolution.

Education & Reference (59)

Periodic Table Quiz

Interactive periodic table - click elements, enter quiz mode, and guess elements from their properties. Gamified learning.

Periodic Table Interactive Reference

Explore the periodic table with element details, properties, and category filtering.

Binary / ASCII / Unicode Character Table

Browse and search ASCII, Unicode, and binary character codes with copy-to-clipboard.

HTML Semantic Structure Quiz

Test your knowledge of semantic HTML elements with quizzes and best-practice tips.

Typing Tutor

Structured typing lessons with finger placement guide. Track WPM improvement over time with localStorage persistence.

Multiplication Table Drill

Timed multiplication drills with accuracy tracking per table (1-12). Progress chart saved across sessions.

Geography Quiz Map

Identify countries and capitals on a continent-organized world grid. Filter by region, track scores, and learn capitals.

Presentation Slide Image Sizer

Resize and format images to standard presentation slide dimensions (16:9, 4:3).

Unit Circle Explorer

Interactive unit circle: drag the angle and see sin, cos, tan values update live. Visual trigonometry learning.

Calligraphy Practice Tool

Practice calligraphy strokes with pressure-sensitive drawing, guide sheets, and reference letterforms.

Periodic Table Coloring Tool

Color and annotate the periodic table by property, group, or custom categories for study purposes.

Math Function Graph Plotter

Plot mathematical functions on a coordinate plane with zoom, multiple functions, and intersection finding.

Number Line Generator

Create customizable number lines with tick marks, labels, fractions, and highlighted intervals for math education.

Coordinate Plane Tool

Plot points, lines, and shapes on a coordinate plane with quadrant labeling and grid snapping.

Maze Generator

Generate printable mazes of various sizes and difficulty levels using recursive backtracking algorithms.

Crossword Puzzle Maker

Create custom crossword puzzles from word lists with automatic grid generation and clue numbering.

Word Search Generator

Create printable word search puzzles from custom word lists with configurable grid size and difficulty.

Bingo Card Maker

Generate printable bingo cards with custom words, numbers, or images with randomized placement.

Flashcard Maker

Create, study, and print two-sided flashcards with spaced repetition and progress tracking.

Sudoku Puzzle Generator

Generate printable Sudoku puzzles at easy, medium, hard, and expert difficulty with solution keys.

Handwriting Worksheet Maker

Generate printable handwriting practice sheets with custom text, letter tracing, and guide lines.

Simple Music Notation Editor

Write basic music scores with notes, rests, time signatures, and playback using Web Audio API.

Guitar Chord Diagram Generator

Create and print guitar chord diagrams with finger positions, barre chords, and custom tuning.

Color By Number Generator

Convert images into color-by-number templates with numbered regions and color palette legend.

Connect the Dots Maker

Create numbered dot-to-dot puzzles from images or custom drawings for children's activities.

PDF Footnote Viewer

Extract and display all footnotes and endnotes from academic PDF documents.

Quiz Maker

Build multiple-choice and true/false quizzes with scoring, timer, and review mode stored locally.

Study Timer / Study Planner

Track study sessions by subject with built-in Pomodoro cycles, daily goals, and weekly progress charts.

Pronunciation Checker

Type a word or phrase and hear it spoken aloud in multiple languages using the Speech Synthesis API.

Typing Practice Game

Gamified typing practice with falling words, scoring, difficulty levels, and WPM tracking over time.

Memory Card Matching Game

Classic memory card-flipping game with difficulty levels, move counter, timer, and best score tracking.

Grade Calculator

Calculate weighted and unweighted grades from assignments with what-if scoring and final grade prediction.

Citation Generator

Generate formatted citations in APA, MLA, Chicago, and Harvard styles from book, website, or journal details.

Word Scramble Game

Unscramble randomly shuffled words with hint system, difficulty levels, and score tracking.

Anagram Solver

Enter letters and find all valid English words that can be formed from them with length filtering.

Crossword Puzzle Helper

Enter known letters and blanks to find matching words for crossword puzzles from a built-in dictionary.

Musical Note Frequency Tuner

Play reference tones for musical notes using Web Audio API with tuning standard adjustment (A4 = 440Hz).

Online Guitar Tuner

Tune your guitar by matching microphone input to reference pitches using Web Audio frequency analysis.

Virtual Piano Keyboard

Play a virtual piano in your browser using keyboard shortcuts or mouse clicks with Web Audio synthesis.

Drum Machine / Beat Maker

Create drum patterns on a step sequencer grid with multiple kits, tempo control, and loop playback.

Morse Code Practice Trainer

Learn and practice Morse code with audio playback, speed control, and interactive exercises.

Typing Speed Race

Competitive typing race against AI opponents with difficulty levels, leaderboard, and personal bests.

Element Flashcard Quiz

Flashcard-style quiz on chemical elements covering symbol, atomic number, and electron configuration.

Math Flashcards

Practice addition, subtraction, multiplication, and division with auto-generated flashcards and scoring.

Roman Numeral Quiz

Practice converting between Roman numerals and Arabic numbers with timed quiz mode and scoring.

Color Matching Game

Test your color perception by matching HEX values, finding complementary colors, and identifying hues.

Diffie-Hellman Key Exchange Demo

Interactive demonstration of the Diffie-Hellman key exchange protocol with step-by-step visualization.

AES Modes Comparison

Compare AES encryption modes (ECB, CBC, CTR, GCM) visually with encrypted output and security analysis.

Caesar Cipher Tool

Encrypt and decrypt text using the Caesar cipher with shift selection and brute-force decryption display.

Vigenere Cipher Tool

Encrypt and decrypt text using the Vigenere cipher with key visualization and frequency analysis tools.

OAuth 2.0 Playground

Interactive OAuth 2.0 flow simulator for learning authorization code, implicit, and client credentials grants.

Encryption Playground

Interactive tool to experiment with different encryption algorithms (AES, DES, RC4, Blowfish) and compare their outputs.

JWT Cheat Sheet

Interactive JWT reference showing registered claims, common algorithms, and best practices with examples.

Hash Cracker Simulator

Educational tool demonstrating dictionary and brute-force hash cracking techniques against common hash types.

One-Time Pad Generator

Generate cryptographically random one-time pads and encrypt/decrypt messages with perfect secrecy (educational).

WebCrypto API Playground

Interactive playground for experimenting with the Web Crypto API - key generation, encryption, signing, and hashing.

HTML Character Reference

Browse and search HTML character entities with name, number, and Unicode code point for special characters.

Unicode Character Lookup

Search Unicode characters by name, code point, or block with copy-to-clipboard and encoding display.

Schema.org Type Reference

Browse and search Schema.org types and properties with examples, required fields, and hierarchy navigation.