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.
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.
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.