Developer Tools, Done Right.
Fast, free, and private. Every tool runs 100% in your browser.
Formatters
JSON Formatter & Validator
Format, validate, and beautify JSON data with syntax highlighting. Minify or prettify JSON with customizable indentation.
SQL Formatter
Format and beautify SQL queries with support for multiple dialects. Customizable indentation and keyword casing.
Markdown Preview
Write and preview Markdown in real time with GitHub Flavored Markdown support. Export as HTML.
ultraJSON Explorer
Browse huge JSON files (100MB+) without crashing your browser. Lazy tree view — only parses what you expand. Handles files that other tools can't.
Encoders / Decoders
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text. Supports UTF-8 encoding.
URL Encode / Decode
Encode or decode URL components. Handles special characters, query parameters, and full URLs.
newBase64 Image Encoder
Convert images to base64 data URIs and decode base64 back to images. Supports PNG, JPEG, GIF, SVG, WebP. Get CSS snippets, file info, and instant preview.
Decoders
JWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, and verify structure.
ultraWASM Call Stack Resolver
Decode WASM crash call stacks to readable function names. Upload a .wasm binary and paste stack traces from Chrome, Firefox, or Node.js. The online alternative to addr2line for WebAssembly.
newQR Code Reader
Decode QR codes from images, camera, or clipboard. Supports PNG, JPG, SVG, and WebP. Auto-detect URLs with one-click open.
Generators
UUID Generator
Generate UUID v4 (random) identifiers. Bulk generate, copy, and customize format.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text input.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words. Customizable count with classic Lorem Ipsum start.
newQR Code Generator
Generate QR codes from text or URLs. Customize size, colors, and error correction level. Download as PNG or SVG.
newPassword Generator
Generate cryptographically secure passwords with customizable length, character sets, and strength indicator. Bulk generate up to 50 passwords at once.
Converters
Color Converter
Convert colors between HEX, RGB, and HSL formats with a visual color picker.
Timestamp Converter
Convert between Unix timestamps and human-readable dates. Supports seconds and milliseconds, multiple date formats.
YAML ↔ JSON
Convert between YAML and JSON formats. Bidirectional conversion with real-time preview.
CSV ↔ JSON
Convert between CSV and JSON formats. Supports custom delimiters, header detection, and quoted fields.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal. Supports large numbers with BigInt.
Text Case Converter
Convert text between camelCase, PascalCase, snake_case, kebab-case, UPPERCASE, lowercase, and more.
newChmod Calculator
Calculate Linux file permissions. Convert between numeric (755) and symbolic (rwxr-xr-x) notation. Get the chmod command.
Testers
Regex Tester
Test and debug regular expressions with real-time matching, highlighting, and capture group support.
Diff Checker
Compare two texts and highlight the differences line by line. Inline character-level highlighting for modified lines.
newCron Expression Parser
Parse and validate cron expressions. Visualize field breakdown and preview the next 10 scheduled run times.
newJSON Schema Validator
Validate JSON data against a JSON Schema. View detailed error messages with paths. Supports JSON Schema draft-07.
Minifiers
HTML Minifier
Minify HTML by removing comments, collapsing whitespace, and stripping optional tags. View compression stats.
CSS Minifier
Minify CSS by removing comments, collapsing whitespace, shortening zero values, and removing unnecessary semicolons.
JS Minifier
Minify JavaScript by removing comments and whitespace. Preserves strings, template literals, and regex patterns.
Developer Games
Take a break and compete with fellow developers
DevWordle — Daily Tech Word Game
Guess the 5-letter tech term in 6 tries. A daily word puzzle for developers — share your results with emoji grids.
Snake Game
Play the classic Snake game right in your browser. Eat food, grow longer, avoid walls. A fun break for developers.
2048 Game
Slide and merge number tiles to reach 2048. A classic puzzle game with score tracking and undo support.