JavaScript Formatter
Paste messy JavaScript, get clean, readable code back.
- Processed locally — your files never leave your device
- Free, no sign-up
- No file limits
Input
Output
How to use JavaScript Formatter
- 1
Paste your JavaScript code on the left.
- 2
The result appears instantly on the right.
- 3
Copy it or download the file.
Features
- Prettier qualityConsistent, community-standard formatting.
- InstantUpdates as you paste or edit.
- PrivateYour code never leaves your browser.
Frequently asked questions
Is my code stored?
No. Everything runs in your browser.
What if my code has a syntax error?
You'll see the error with its location so you can fix it.
Is it free?
Yes, with no limits.