JS Formatter
Format and beautify JavaScript with clean indentation — a simple, fast formatter for everyday code — free, fast and private.
How to use JS Formatter
- Paste your JavaScript into the box.
- Click Format JS to beautify it.
- Review the indented output.
- Copy the formatted code.
Note: this tool runs in your browser. Nothing is uploaded.
Honest note: This is a simple structural formatter (it indents by braces, brackets and semicolons) — not a full JavaScript parser. It handles everyday code well, but very unusual syntax (template literals with braces, regex literals containing braces) may indent imperfectly. For production-grade formatting, use Prettier.
Frequently Asked Questions
Is this a full JavaScript parser?
No. It is a simple structural formatter that indents by braces, brackets and semicolons. It handles everyday code well but is not a replacement for Prettier on complex code.
Does formatting change how my code runs?
No. It only changes whitespace and line breaks. The code itself is unchanged.
What if my JavaScript has a syntax error?
The formatter still tries to indent it, since it does not parse the code strictly. Check the output carefully.
Is my code uploaded anywhere?
No. Formatting runs entirely in your browser.