The Ultimate Developer Toolbox

Format, beautify, validate and minify JSON online for free. Features syntax highlighting, tree view, history tracking, and one-click copy. No signup required. 100% client-side processing for privacy.

Free online tool to json escape and unescape strings instantly. Escape json special characters, json unescape encoded strings, and json string escape for safe embedding. Correctly handles quotes, backslashes, and unicode. Ideal for developers working with APIs and complex data structures.

Free json diff tool to compare json online. Find json difference between two JSON objects instantly. Json comparison with support for nested objects and arrays. Compare two json files with highlighted differences. A valuable json diff online tool for developers.

Convert JSON to CSV format online for free. Transform JSON arrays into CSV spreadsheet format instantly. No signup required, 100% client-side processing for privacy.

Convert CSV to JSON format online for free. Transform CSV spreadsheet data into JSON arrays instantly. No signup required, 100% client-side processing for privacy.

Generate JSON Schema from any JSON data instantly. Supports Draft 04, 06, 07, 2019-09, and 2020-12. Auto-detect types, formats, and required fields. Free, no signup, 100% client-side.

Convert JSON to TypeScript interfaces, Go structs, Python dataclasses, Java classes, Rust structs, and C# classes. Free online tool with instant code generation. No signup required.

Test JSONPath expressions online for free. Evaluate queries against JSON data with real-time results. Supports wildcards, recursive descent, filters, and array slicing. No signup required.

Compress PDF files online to reduce their size without losing quality. Our PDF compressor offers various compression levels for optimal file size reduction, making it easy to share and upload documents.

Merge multiple PDF files into one document online for free. Our PDF merger allows you to combine PDFs easily, reorder pages, and create a single, organized PDF file. No registration required.

Split PDF documents into multiple files or extract specific pages with our free online PDF splitter. Easily separate PDF pages, extract pages from PDF, or divide your PDF into custom ranges.

Easily convert your JPG, PNG, and other images to PDF format with our free online Image to PDF converter. Convert JPG to PDF, PNG to PDF, and more.

Convert PDF to JPG images online for free. Extract high-quality images from PDF files with adjustable quality and scale settings.

Easily encode text and images to Base64 and decode Base64 back. Our free online tool supports UTF-8, image to Base64, and file to Base64 conversions. Fast, secure, and simple to use.

Easily encode and decode URLs with our free online tool. Convert special characters for safe web transmission (percent-encoding) or decode them back to a readable format. Fast, simple, and reliable.

Generate md5 hash instantly with our free md5 generator online. Create md5 checksum in 32-bit and 16-bit formats. Generate md5 for file integrity checks, password hashing, and data verification. Fast, secure md5 hash online tool.

Easily generate, decode, and inspect JSON Web Tokens (JWT). Our online tool supports HS256, HS384, and HS512 algorithms for secure token creation and analysis.

Convert coordinates to geohash and decode geohash to lat/long instantly. Free online geohash converter with interactive map visualization, precision control (1-12), and neighbor cell display. Perfect for developers and GIS professionals.

Instantly convert timestamp to date and date to timestamp online. Free epoch time converter supporting seconds, milliseconds, nanoseconds. Convert timestamp to human-readable date in GMT and Local time. The best online Unix timestamp to date tool for developers.

Display the current time in multiple cities on a single dashboard.

Convert between different units of measurement including length, weight, volume, area, temperature, and more.

Convert numbers between different bases including Binary, Octal, Decimal, Hexadecimal, Base32, Base58, and Base62. Supports arbitrary precision conversion.

Test and debug regular expressions online with real-time highlighting and replacement preview.

Convert XML to JSON format instantly with our free online tool. Supports complex XML structures with attributes, nested elements, and arrays. 100% client-side processing for complete privacy.

Convert JSON to XML format instantly with our free online tool. Generate well-formatted XML from JSON data with proper indentation. 100% client-side processing for complete privacy.

Format and beautify SQL queries online. Supports MySQL, PostgreSQL, SQLite, and more.

Generate QR codes for free with our powerful online tool. Support for URLs, WiFi, vCards, email, phone numbers, and plain text. Customize colors, add your logo, and download in PNG or SVG format.

Generate UUIDs instantly with our free online tool. Supports UUID v1, v4, Nil versions. Bulk generate up to 1000 UUIDs. Multiple formats available. Fast and secure.

Free online color picker and converter tool. Convert between HEX, RGB, HSL, HSV color formats instantly. Generate color palettes, pick colors visually, and copy color codes with one click.

Generate and parse cron expressions online for free. Visual cron job scheduler with next execution times, syntax validation, and common presets. Perfect for Linux, Unix, and cloud scheduling.

Free online text diff tool to compare two texts and find differences. Supports line-by-line, word-by-word, and character-by-character comparison. Highlight additions and deletions instantly.

Generate hash values instantly with our free online tool. Supports MD5, SHA-1, SHA-256, SHA-512, SHA-384, SHA3, RIPEMD-160 algorithms. Calculate hashes for text and files. Fast, secure, and easy to use.

Generate strong, secure random passwords instantly with our free online tool. Customize length, character types, and generate multiple passwords at once. 100% client-side, your data never leaves your browser.

Convert YAML to JSON format instantly with our free online tool. Supports complex YAML structures with nested objects, arrays, and multi-line strings. 100% client-side processing for complete privacy.

Convert JSON to YAML format instantly with our free online tool. Generate clean, human-readable YAML from JSON data. 100% client-side processing for complete privacy.

Convert JSON to TOON format to reduce LLM token consumption by up to 50%. TOON (Token-Oriented Object Notation) is optimized for AI/LLM input with compact tabular arrays. Free online tool with real-time token savings display.

Convert TOON (Token-Oriented Object Notation) back to standard JSON format. Parse LLM-optimized compact data into readable JSON. Free online tool with syntax validation and instant conversion.

Free online Lorem Ipsum generator to create placeholder text for your designs, mockups, and prototypes. Generate paragraphs, sentences, words, or lists instantly. No registration required.

Free online Markdown editor with real-time preview. Write and preview Markdown instantly, export to HTML or download as .md file. Supports tables, code blocks, and all standard Markdown syntax.

Free online HTML entity encoder and decoder. Convert special characters to HTML entities for safe display in web pages. Encode or decode HTML entities instantly.

Free online JavaScript formatter and minifier. Beautify, format, and compress JS code instantly. Supports ES6+ syntax with customizable indentation options.

Free online CSS formatter and minifier. Beautify, format, and compress CSS code instantly. Clean up stylesheets with customizable indentation options.

Look up any IP address to find its geolocation, ISP, timezone, and network information. Detect your own IP address instantly. Free online tool, no signup required.

Convert text to ASCII codes, Unicode code points, hexadecimal, binary, and HTML entities. Includes ASCII table reference. Free online tool, no signup required.

Free online HTML to Markdown converter. Convert HTML code to clean Markdown format instantly. Supports GFM tables, code blocks, and more.

Free online Markdown to HTML converter. Convert Markdown text to HTML code instantly with syntax highlighting, tables, and code blocks support.

Free online code diff tool to compare two code snippets with syntax highlighting. Supports 20+ programming languages. Find differences instantly with GitHub-style diff view.

Compress image files online with our image compressor. Reduce image size while maintaining good quality. Supports JPEG, PNG, GIF, WEBP and other formats, with batch processing up to 100 images at once.

Convert various image formats to JPG online with our Image to JPG converter. Convert PNG to JPG, and more.

Free online tool to resize multiple images at once. Batch resize JPG, PNG images by dimensions or percentage while maintaining aspect ratio.

Crop images to a specific area or aspect ratio

Easily add text or image watermarks to your photos online. Protect your images with customizable watermarks. No uploads required, completely free and secure.

Convert any image to a vector-based SVG file.

Convert PNG to JPG online for free. Fast, secure, and high-quality PNG to JPG conversion with adjustable quality settings. No upload limits.

Convert JPG to PNG online for free. Fast and easy JPG to PNG conversion with lossless quality. Perfect for adding transparency support.

Convert WebP to JPG online for free. Fast, secure WebP to JPG conversion with adjustable quality. Perfect for compatibility with older software.

Convert SVG to PNG online for free. High-quality SVG to PNG conversion with custom scale settings. Perfect for creating raster images from vectors.

Convert images to Base64 encoding online for free. Generate Data URI, raw Base64, HTML img tags, and CSS background code instantly.

Free online Base64 to image converter. Decode Base64 strings to images. Supports Data URI and pure Base64 formats, download as PNG, JPG, or WebP.

Free online SVG optimizer tool. Compress and optimize SVG files to reduce file size while maintaining quality. Remove unnecessary metadata, comments, and optimize paths.

An authoritative, comprehensive, and continuously updated AI resources directory. It covers global and domestic model providers, open-source ecosystems, research indexes and leaderboards, developer platforms, and curated tool catalogs—helping you quickly discover, compare, and choose the right AI products and references. Supports keyword search and favorites, with clear category sections and an expanding dataset for better experience.

A structured prompt engineering and inspiration directory: official best practices, community galleries and workflows, open-source lists and tools, marketplaces and template collections. Find high-quality references fast, build reusable prompt patterns, and boost productivity. Supports keyword search and favorites, with clear categories and ongoing expansion of top resources.