Is the JavaScript beautifier free?

Yes, entirely. No sign-up, no watermarks, and no limit on how much code you beautify or minify.

Does my code leave my browser?

No. All beautifying and minifying happens on-device in your browser, so your scripts never leave your computer and the tool works offline once loaded.

Is the minifier safe to use?

Yes. It only removes comments and insignificant whitespace without renaming identifiers, and it preserves strings and template literals, so your code keeps the same behavior.

Can I beautify code that was already minified?

Absolutely. Paste minified JavaScript and choose beautify to restore clean indentation and line breaks for easy reading.

JavaScript beautifier

WEB

Free online JavaScript beautifier and minifier that formats, indents, and compacts JS code in your browser.

What it does

The Carbide JavaScript beautifier reformats messy or minified JS into clean, consistently indented code that is far easier to read and debug, and can compact it back down by stripping comments and insignificant whitespace when you want a leaner file. It is free, runs completely in your browser, and is offline-friendly after the first load, so your scripts stay private and are never uploaded to any server. Paste a function, a module, or a whole file into the editor, choose beautify for readable formatting powered by an industry-standard engine, or minify for a compact result. The minifier is intentionally safe: it never renames identifiers and carefully leaves the contents of strings and template literals untouched, so your code keeps working and can always be beautified again. Live syntax highlighting makes it easy to follow logic and catch mistakes as you edit, and you can copy the output or download it as a .js file in one click. It is perfect for tidying up generated code, reviewing snippets, or quickly shrinking scripts.

How to use the JavaScript beautifier

Paste or type your JavaScript into the editor
Choose beautify for clean, indented code
Or choose minify to compact the script
Read the result with live syntax highlighting
Copy the code or download it as a .js file

Frequently asked questions

Is the JavaScript beautifier free?: Yes, entirely. No sign-up, no watermarks, and no limit on how much code you beautify or minify.
Does my code leave my browser?: No. All beautifying and minifying happens on-device in your browser, so your scripts never leave your computer and the tool works offline once loaded.
Is the minifier safe to use?: Yes. It only removes comments and insignificant whitespace without renaming identifiers, and it preserves strings and template literals, so your code keeps the same behavior.
Can I beautify code that was already minified?: Absolutely. Paste minified JavaScript and choose beautify to restore clean indentation and line breaks for easy reading.

Take Carbide everywhere

All 121 tools, offline, on iOS & Android — free.