DeveloperTools.
Format, encode, hash, and generate — all in your browser. Zero dependencies, zero server calls, 100% private.
Developer
JSON Formatter & Validator
Format, validate, and minify JSON data instantly. Free online tool with error detection, indentation options, and one-click copy.
Open Tool ›🔐Base64 Encode & Decode
Encode text to Base64 or decode Base64 strings back to plain text. Supports Unicode, real-time conversion, and copy-to-clipboard.
Open Tool ›🔗URL Encode & Decode
Encode and decode URLs and query parameters instantly. Supports encodeURIComponent and encodeURI modes with percent-encoding.
Open Tool ›#️⃣Hash Generator
Generate SHA-256, SHA-384, SHA-512, and SHA-1 hashes from text instantly. Secure client-side hashing with copy-to-clipboard.
Open Tool ›🆔UUID Generator
Generate random UUID v4 identifiers instantly. Create single or bulk UUIDs, copy to clipboard, and customize the output format.
Open Tool ›📝Lorem Ipsum Generator
Generate lorem ipsum placeholder text for web design and development. Create paragraphs, sentences, or words with customizable length.
Open Tool ›🔍Regex Tester
Test and debug regular expressions in real-time with instant match highlighting, capture group extraction, find-and-replace, and preset patterns.
Open Tool ›📝Diff Checker
Compare two texts side-by-side and find differences instantly. Split and unified views with inline word-level highlighting.
Open Tool ›🔑JWT Decoder
Decode and inspect JSON Web Tokens instantly. View header, payload, claims, and expiration status. 100% client-side.
Open Tool ›⏰Unix Timestamp Converter
Convert Unix timestamps to dates and vice versa. Live clock, ISO 8601, relative time, day of year, and week number.
Open Tool ›⏰Cron Expression Generator
Build and test cron expressions visually. See human-readable descriptions, next run times, and use quick presets for common schedules.
Open Tool ›🔄JSON to TypeScript Converter
Convert JSON to TypeScript interfaces instantly. Generate type-safe interfaces and type definitions from any JSON data with customizable options.
Open Tool ›🗄️SQL Formatter & Beautifier
Format, beautify, and minify SQL queries instantly. Customizable keyword casing, indentation, and comma placement. Supports MySQL, PostgreSQL, and more.
Open Tool ›🔄CSV to JSON Converter
Convert CSV to JSON and JSON to CSV instantly with automatic delimiter detection, data preview, and downloadable output.
Open Tool ›📄HTML Formatter & Beautifier
Format, beautify, and minify HTML code instantly with customizable indentation, syntax validation, and one-click copy.
Open Tool ›📋XML Formatter & Validator
Format, validate, and minify XML documents instantly with syntax highlighting, error detection, and tree view visualization.
Open Tool ›📄YAML Formatter & Validator
Format, validate, and convert YAML to JSON or vice versa. Perfect for DevOps engineers working with Kubernetes, Docker Compose, and CI/CD pipelines.
Open Tool ›🖼️Base64 Image Encoder & Decoder
Convert images to Base64 data URLs and decode Base64 back to images. Supports PNG, JPG, WebP, GIF with live preview and size comparison.
Open Tool ›📦Code Minifier
Minify JavaScript, CSS, and HTML code to reduce file size and improve performance. Visual size reduction stats and instant optimization.
Open Tool ›⚙️Environment Variable Manager
Create, edit, format, and validate .env files with syntax validation. Convert between .env and JSON formats with sorting and analysis.
Open Tool ›🗜️Gzip Compress & Decompress
Compress and decompress text using gzip, deflate, or raw compression algorithms. Base64 encoding with compression ratio visualization and size comparison.
Open Tool ›🔑JWT Encoder
Create and sign JSON Web Tokens with HS256, HS384, or HS512 algorithms. Customize header and payload with real-time encoding and signature generation.
Open Tool ›🔗URL Slug Generator
Generate clean, SEO-friendly URL slugs from any text. Automatically converts titles to URL-safe slugs with customizable separators, case, and character handling.
Open Tool ›📝Markdown to HTML Converter
Convert Markdown to HTML instantly with live preview. Supports GitHub Flavored Markdown, code syntax highlighting, tables, and more.
Open Tool ›🌐HTTP Status Code Checker
Comprehensive HTTP status code reference guide with search. Look up 1xx, 2xx, 3xx, 4xx, and 5xx status codes with descriptions and use cases.
Open Tool ›🔧API Response Formatter
Format and beautify API responses in JSON, XML, or HTML with auto-detection. Real-time formatting with response statistics and analysis.
Open Tool ›💾Byte Converter
Convert between bytes, KB, MB, GB, TB, and PB instantly. Supports both binary (1024) and decimal (1000) conversion modes.
Open Tool ›📄MIME Type Lookup
Comprehensive MIME type reference with 50+ file types. Search by extension or MIME type with instant filtering and category browsing.
Open Tool ›🔤Escape & Unescape String
Escape and unescape strings for JavaScript, HTML, URL encoding, and Unicode. Real-time conversion with bidirectional support.
Open Tool ›🧪Mock Data Generator
Generate realistic fake data for testing and development. Build custom schemas with 25+ field types and export as JSON, CSV, or TypeScript.
Open Tool ›🔗Open Graph Preview
Preview how your website looks when shared on Facebook, Twitter/X, LinkedIn, Slack, and Discord. Generate Open Graph meta tags instantly.
Open Tool ›⌨️JavaScript Keycode Finder
Press any key to instantly see its JavaScript event properties: event.key, event.code, keyCode, location, and modifier states. Free keycode lookup tool for developers.
Open Tool ›🔐Chmod Calculator
Interactive chmod permission calculator. Convert between numeric (octal) and symbolic Unix file permissions with SUID, SGID, and sticky bit support.
Open Tool ›🔤ASCII Art Text Generator
Convert text to large ASCII art banners with 5 font styles. Perfect for CLI banners, code comments, README headers, and commit messages.
Open Tool ›🖼️Placeholder Image Generator
Generate custom placeholder images with configurable dimensions, colors, text, and patterns. Download as PNG or SVG, copy as data URL.
Open Tool ›🌐Subnet Calculator
Calculate IPv4 subnets with CIDR notation. Get network address, broadcast, host range, wildcard mask, and binary visualization.
Open Tool ›📝HTML to Markdown Converter
Convert HTML to Markdown format instantly with live preview. Supports tables, lists, code blocks, links, images, and more. Free online HTML to Markdown converter.
Open Tool ›🌐IP Address Converter
Convert IPv4 addresses between binary, decimal, and hexadecimal formats. Calculate network ranges, subnet masks, and visualize IP structure with CIDR support.
Open Tool ›📐SVG Optimizer
Optimize SVG files by removing unnecessary data, whitespace, and metadata. Reduce file size while maintaining visual quality. Safe and aggressive modes available.
Open Tool ›🔤HTML Entity Converter
Convert special characters to HTML entities and decode entities back to characters. Supports named entities (&, <) and numeric codes. Bi-directional conversion.
Open Tool ›🔌WebSocket Tester
Test WebSocket connections in real-time. Connect to ws:// and wss:// servers, send messages, view responses with timestamps, and debug WebSocket protocols.
Open Tool ›📡HTTP Headers Analyzer
Parse and analyze HTTP request and response headers. Check security headers, CORS policies, caching directives with detailed explanations and security score.
Open Tool ›⚙️Nginx Config Generator
Generate production-ready Nginx server blocks visually. Create reverse proxy configs, SSL/HTTPS setup, security headers, and caching rules with best practices.
Open Tool ›🌐Browser Feature Detector
Detect which modern web APIs and JavaScript features your browser supports. Check 100+ features including WebGL, Service Workers, IndexedDB, and more.
Open Tool ›🌍DNS Record Types Guide
Complete reference guide for DNS record types. Search and learn about A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA, and more with examples and use cases.
Open Tool ›🤖Robots.txt Generator
Generate robots.txt files for your website instantly. Control search engine crawler access with custom rules, sitemaps, and user-agent directives.
Open Tool ›📦JavaScript Minifier
Minify and compress JavaScript code to reduce file size. Remove whitespace, comments, and optimize code with compression statistics and side-by-side comparison.
Open Tool ›🌐HTTP Request Builder
Visual HTTP request builder and API testing tool. Craft GET, POST, PUT, DELETE requests with headers, body, and authentication. Test APIs instantly in your browser.
Open Tool ›PDF Tools Suite
All-in-one PDF toolkit: merge multiple PDFs, extract specific pages, or remove unwanted pages. Visual page previews, drag-to-reorder. 100% in-browser.
Open Tool ›✍️PDF eSign
Sign PDF documents for free in your browser. Draw, type, or upload your signature, place it anywhere on any page, and export the signed PDF. 100% client-side.
Open Tool ›Design
Color Picker & Converter
Pick colors, convert between HEX, RGB, and HSL formats. Generate color harmonies, shades, tints, and check WCAG contrast ratios.
Open Tool ›🎨CSS Box Shadow Generator
Design beautiful CSS box shadows with a visual editor. Multiple layers, presets, live preview, and one-click copy for CSS and Tailwind.
Open Tool ›🎨CSS Gradient Generator
Create beautiful CSS gradients with a live visual editor. Build linear, radial, and conic gradients with custom color stops, presets, and one-click CSS code copy.
Open Tool ›🎨Color Contrast Checker
Check color contrast ratios for WCAG AA and AAA accessibility compliance. Ensure your text and UI elements meet web accessibility standards.
Open Tool ›📐CSS Flexbox Playground
Visual CSS Flexbox editor with live preview. Experiment with flex-direction, justify-content, align-items, and more. Copy CSS or Tailwind classes.
Open Tool ›🔲CSS Grid Generator
Visual CSS Grid layout builder with live preview. Define columns, rows, gaps, and item placement. Generate CSS or Tailwind code with presets.
Open Tool ›🎬CSS Animation Generator
Visual CSS animation editor with keyframe builder and live preview. Customize timing, transforms, and easing. Generate and copy CSS code instantly.
Open Tool ›🎨Color Palette Extractor from Images
Extract dominant color palettes from images instantly. Upload any image and get HEX, RGB, and HSL values for the main colors. Perfect for designers and developers.
Open Tool ›🎨CSS Filter Generator
Create CSS filter effects with live preview. Adjust blur, brightness, contrast, saturation, hue-rotate, grayscale, sepia, and more. Copy CSS code instantly.
Open Tool ›🔄CSS Transform Generator
Visual CSS transform generator with live preview. Create scale, rotate, translate, and skew transformations. Copy CSS code instantly for your web projects.
Open Tool ›Text
Markdown Preview
Write and preview Markdown in real-time with split, edit, and preview modes. Supports headings, lists, code blocks, tables, and more.
Open Tool ›🔢Word Counter
Count words, characters, sentences, paragraphs, and estimate reading time instantly. Includes word frequency analysis.
Open Tool ›🔄Case Converter
Convert text between lowercase, UPPERCASE, Title Case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more.
Open Tool ›📊Text Statistics Analyzer
Analyze text with detailed statistics, word frequency charts, readability scores (Flesch Reading Ease, Flesch-Kincaid), and keyword density analysis.
Open Tool ›Security
Generator
Productivity
Media
Image Compressor & Optimizer
Compress and optimize images with quality control, format conversion (JPG/PNG/WebP), before/after comparison, and batch processing.
Open Tool ›📝YouTube Transcript Generator
Generate accurate transcripts from YouTube videos instantly. Batch transcribe up to 20 videos at once and export as plain text, timestamps, or SRT subtitles in 20+ languages.
Open Tool ›🎵TikTok Transcript Generator
Generate transcripts from TikTok videos instantly. Batch transcribe up to 20 TikToks and export as plain text, timestamps, or SRT subtitles in 20+ languages.
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