JavaScript Formatter Beautifier Minifier Online Free — Free Online Tool

Format, beautify and minify JavaScript code online free. Strip comments, ES6+ support, size savings percentage shown. No server upload — instant in-browser processing.

Free Forever

No Signup

No Upload

100% Private

Browser-based

Features

Built for real developer workflows. No fluff, just the tools you need.

⚡

JS Beautifier

Adds proper indentation, newlines and spacing to any JavaScript — minified bundles become readable instantly.

📦

JS Minifier

Removes whitespace and comments. Shows exact size savings percentage.

✂️

Strip Comments

Remove single-line (//) and block (/* */) comments without changing any executable code.

📊

Size Statistics

Original vs output size and percentage saved shown after every operation.

🔧

ES6+ Compatible

Handles arrow functions, template literals, destructuring, spread operators and modern JS syntax.

🔒

Code Privacy

Your JavaScript never leaves your browser — safe for proprietary business logic.

How to use

Get results in seconds — no account, no file upload required.

Paste JavaScript

Paste any JS — minified bundle, hand-written module or copied from DevTools.

Beautify or Minify

Beautify for readability, Minify for production, Strip Comments to clean documentation-heavy code.

Copy the output

Click Copy to copy the processed JavaScript.

More free tools

Every tool at itsseven is free, private and browser-based.

Frequently asked questions

Does beautifying change how code runs?

▾

No. Beautifying only adds whitespace — JavaScript ignores whitespace between tokens.

Can I minify third-party libraries?

▾

Yes, but check the license. Many open-source libraries require attribution even in minified form.

Does minification obfuscate?

▾

Basic minification only removes whitespace and comments. Variable names are unchanged. Use a dedicated obfuscator for name mangling.

Does it support TypeScript?

▾

TypeScript often beautifies correctly since it is a superset of JavaScript. Type annotations may not minify cleanly.

Can I beautify a minified library?

▾

Yes — paste minified code and click Beautify. Variable names stay short but the structure becomes navigable.

Why did minification increase file size?

▾

This can occur if the input had minimal whitespace already or if newlines were serving as implicit statement separators.