Developer & Code

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

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

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

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

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

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

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

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

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

Minify CSS for production or beautify compressed CSS for readability.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Scan and decode barcodes from uploaded images or live camera.

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

Analyze image colors and generate matching CSS gradient code.

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

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

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

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

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

Generate multiple sized versions of images for responsive srcset attributes.

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

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

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

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

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

Create beautiful code screenshots with syntax highlighting and custom themes.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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