Quick Answer
A JavaScript beautifier re-indents minified or cramped code so each statement sits on its own line at the correct depth. This one is brace-aware and string-safe — blocks indent, and the inside of strings and template literals is never touched.
What This Tool Does
The beautifier scans your code, tracking quote context so it never reformats inside strings, and uses brace depth to indent blocks. Statements end cleanly at semicolons, braces get their own lines (or stay inline in collapse style), and // and /* */ comments are preserved — the classic readable style used by js-beautifier-style tools.
Key Features
- Brace-aware —
{and}drive indentation depth. - String-safe — quotes and template literals are preserved verbatim.
- Comments preserved —
// lineand/* block */comments are kept on their own lines. - Adjustable indentation — 1–8 spaces or tabs, updating live.
- Brace styles — expand (
{on a new line) or collapse (} else {on one line). - Space inside parentheses — optional
f( a, b )style. - Statement-per-line — semicolons split long runs of minified code.
- Upload file or load from URL — format existing scripts directly.
- Instant — live updates as you type.
How to Use the JavaScript Beautifier
- Paste your minified JavaScript into the input box, or use Upload File / Load from URL.
- Pick an indentation style and, if you like, switch the brace style in the advanced options.
- Read the formatted output on the right.
- Copy or download the readable version.
Use Cases
- Reading a minified third-party script before deciding to use it.
- Recovering a readable version of a snippet you only have minified.
- Reviewing a generated bundle section by section.
Tips
- Beautified output is for humans — keep minifying for production.
- Arrow functions and object literals survive fine, but check a couple of complex expressions after formatting.
Privacy
Your code never leaves your browser.
Conclusion
Readable code is debuggable code. Paste minified JS, get it back human-readable, and move on — free and private.