JavaScript Formatter & Beautifier
Reformat minified or sloppy JavaScript into clean, evenly indented code that's easy to read, entirely in the browser. Paste it in, format, and copy — your source is never uploaded or run.
- 100% free
- Private & safe
- Runs in your browser
Why use JavaScript Formatter?
JavaScript Formatter is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- JavaScript source
- Paste your JavaScript.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use JavaScript Formatter
- Paste your JavaScript.
- Click Format to indent and tidy the code.
- Review the readable output.
- Copy or download the formatted file.
Examples
- Beautifying a minified script for inspection.
- Standardizing indentation in a snippet.
Supported formats & limits
- JavaScript source
Limitations
- This reformats code; it does not run, lint, or transpile it.
- Very large files may take a moment to format.
Frequently asked questions
Does it run my code?
No. Your code is treated as text and only reformatted — never executed.
Can it beautify minified JS?
Yes, that is a common use case.
Is my code uploaded?
No — formatting is local to your browser.
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