Free JavaScript developer tools, right in your browser
Minify, obfuscate and deobfuscate JavaScript, run code in a safe sandbox, hash files, format JSON and decode JWTs. Fast, private and production-ready.
JavaScript Minifier
Compress JavaScript safely with an AST-based minifier.
Use toolJavaScript Obfuscator
Protect your JavaScript with configurable obfuscation.
Use toolJavaScript Deobfuscator
Beautify and simplify obfuscated JavaScript.
Use toolJavaScript Sandbox
Run HTML, CSS and JavaScript safely in your browser.
Use toolHash Generator
Hash text or files with MD5, SHA-1 and SHA-2.
Use toolJSON Formatter
Format, validate, minify and explore JSON.
Use toolJWT Decoder
Decode JWTs and verify signatures locally.
Use toolURL Encoder / Decoder
Encode and decode URLs instantly.
Use toolUnix Timestamp Converter
Convert between Unix timestamps and dates.
Use toolHTML to JavaScript Converter
Convert HTML into JS strings, template literals and back.
Use toolUUID Generator
Generate UUID v1, v4 and v7 identifiers.
Use toolWhy JS Obfuscator?
Private by design. Every tool runs entirely in your browser inside a web worker — your code, files and tokens never leave your device, so there is nothing to log, store or leak.
Correct by construction. The minifier and obfuscator are built on mature, battle-tested engines (Terser and javascript-obfuscator) rather than fragile regular expressions, so ES5, ES6+, modules, React, Vue, Angular and Node.js code all behave exactly as before.
Fast and safe. Heavy operations run in dedicated workers so the page never freezes, and any code you choose to run is executed in a hardened sandboxed iframe.