JavaScript Formatter
Runs entirely in your browser
Beautify and indent JavaScript directly in your browser. This only rewrites text — it never executes your code.
What is JavaScript Formatter?
JavaScript Formatter re-indents JavaScript code based on braces and statement boundaries, making nested functions, conditionals and loops easy to read. It never runs your code — only the text layout changes.
How to use JavaScript Formatter
- Paste your JavaScript into the Input box.
- Choose an indent size.
- Click Format, then copy the result.
Features
- Indents nested blocks based on braces.
- Correctly recognizes strings, template literals and regex literals.
- Keeps for-loop headers (e.g. for (let i = 0; i < n; i++)) on one line.
- Never uses eval — your code is never executed.
- 100% client-side — your code never leaves your browser.
Frequently Asked Questions
Does this execute my code?
No. This tool never uses eval or runs your code — it only rewrites the text for readability.
Is my code uploaded to a server?
No. Formatting happens entirely in your browser.
Does this handle template literals and regular expressions?
Yes. Template literals (including ${...} expressions) and regex literals are recognized and left untouched, rather than being misread as strings or division.
Is this a full JavaScript parser?
No. It re-indents code based on braces, parentheses and statement boundaries — good for typical code, but it isn't a full AST-based formatter like Prettier, so unusual syntax may not format perfectly.