Free Online Code Unminifier & Beautifier

Instantly deobfuscate, format, and restore indentations to minified JavaScript, CSS, HTML, and JSON code.

Indent:

Braces:

Wrap Lines:

Unpack P.A.C.K.E.R. / eval()

Unescape strings (e.g. \x20, \u0020)

Minified / Raw Input

0 chars 0 lines

Drop your code file here to load

Unminified Output

0 chars 0 lines

Smart JavaScript Deobfuscator

Handles modern ES6+, JSX, TypeScript, arrow functions, template literals, and automatically unpacks Dean Edwards P.A.C.K.E.R. algorithms.

CSS, SCSS & LESS Beautifier

Reconstructs compressed stylesheets, restores nested media queries, CSS variables, keyframe animations, and aligns selectors cleanly.

HTML, SVG & XML Formatter

Indents deeply nested markup hierarchies, formats self-closing tags, preserves attributes, and beautifies embedded <script> and <style> tags.

100% Client-Side Privacy

All parsing, unminifying, and formatting happens right inside your browser engine. Zero code is sent to any server, keeping proprietary code safe.

Frequently Asked Questions About Unminifying

Everything you need to know about minification, code reverse-engineering, and formatting.

Minification removes comments, line breaks, and unnecessary spaces from source code to reduce file transfer size and improve website speed. Unminifying (or beautifying) does the reverse: it analyzes the syntax tokens and restores proper indentation, spacing, and line breaks so that developers can read, debug, and understand the code.

If the original code was only minified (whitespace and comments stripped), all function and variable names remain intact. If the code was also mangled (e.g. via Terser or UglifyJS where variables became a, b, c), an unminifier formats the syntax and control flow cleanly, but the original descriptive variable names can only be restored if a corresponding .map (source map) file is available.

Many minified scripts use Dean Edwards' famous Packer, which wraps the entire script in an eval(function(p,a,c,k,e,d)...) payload. Our tool includes an automated unpacker that de-encodes these packed strings back into raw JavaScript before beautifying it.

Yes, absolutely. The unminify engine operates 100% locally on your browser using client-side JavaScript. Your confidential source code, API payloads, or client scripts never leave your machine and are never uploaded to any external server.

You can press Ctrl + Enter (or Cmd + Enter on macOS) while inside the input textarea to trigger instant beautification.