JavaScript Beautifier
JavaScript Beautifier
A light, token-aware formatter: indentation follows braces and statements get their own lines. Best for typical, already-working code.
The JavaScript Beautifier gives compressed or sloppily spaced JavaScript a readable shape: indentation that follows brace depth and one statement per line. Code copied from a minified bundle, a bookmarklet, or a chat answer is hard to review as a single blob. A quick pass of structure makes it possible to follow the logic again.
The formatter is token-aware rather than a blind text squeeze. It recognises strings, template literals, and comments as single tokens so braces and semicolons inside them never disturb the layout, and it builds indentation from real brace nesting. Statements are separated carefully, keeping the semicolons inside for-loop headers on their line where they belong.
An honest limit, stated plainly: this is a light formatter for typical code, not a full parser like the ones built into large editors. Exotic syntax and heavily chained one-liners may need a quick manual tidy afterwards. It never renames anything, never removes code, and runs completely in your browser, so private source stays private.
How to use
- Paste your JavaScript into the box.
- Click Beautify JavaScript.
- Review the indented result below.
- Copy it into your editor and run your usual checks.
Frequently asked questions
Will beautifying change how my code runs?
It changes layout only: line breaks and indentation. Tokens, strings, and comments are preserved. As with any reformat, test the result once before shipping it.
Why call it a light formatter?
Full JavaScript parsing is a huge job. This tool handles the common shapes of everyday code well and is upfront that unusual constructs may need a small manual fix, rather than pretending to be perfect.
Does it handle template literals and comments?
Yes. The tokenizer treats backtick strings and both comment styles as single units, so their contents never affect indentation.
Is my code uploaded?
Never. The beautifier runs locally in your browser.