Free JS Formatter & Beautifier — Format JavaScript Online
Paste minified, messy, or hard-to-read JavaScript and get clean, consistently indented code in one click — or flip the Minify switch to shrink it for production. The formatter runs entirely in your browser with a real tokenizer that understands strings, template literals, comments, and regular expressions, so your code’s logic is never altered. Free forever, no sign-up, nothing uploaded.
JS Formatter & Beautifier
Paste minified or messy JavaScript and get clean, readable code — or minify it back down.
100% Free Forever
No Sign-up
No Credit Card
Private — files never leave your browser
Unlimited Use
1 Paste your JavaScript
Formatting happens live as you type.
2 Format settings
Spaces per indent level.
Strip whitespace and shrink the code for production.
Drop // and /* */ comments from the output.
3 Get your formatted code
✨ Formatted result
0 chars in → 0 chars out
How it works
- Paste or type JavaScript into the input box — formatting runs live in your browser as you type.
- Pick an indent size (2, 4, or 8 spaces), or flip on Minify instead to shrink code for production.
- Tick Remove comments to strip
//and/* */comments from the output. - The tokenizer understands strings, template literals with
${}, comments, and regex literals — so division vs. regex is never confused and your code’s meaning stays intact. - Copy the result, or download it straight to a
.jsfile.
Everyday uses
- Read minified code: paste a minified bundle and actually understand what it does.
- Prep code for review: consistent indentation before sharing, committing, or pasting into docs.
- Shrink for production: minify and strip comments before deploying to save bytes.
- Decode snippets: reformat dense Stack Overflow answers into readable, learnable code.
- Spot structural bugs: proper indentation makes unbalanced braces obvious at a glance.