JavaScript Formatter / Minifier
Free online tool · runs in your browser
Format or minify JavaScript (lightweight).
Quick tutorial
- 1Paste JavaScript.
- 2Choose Format or Minify.
Free online javascript formatter / minifier
Beautify or minify JavaScript in the browser for quick edits. This is a lightweight formatter, not Prettier, ESLint, or a bundler — complex syntax and JSX may not format perfectly. Use it to make a snippet readable or strip extra whitespace before pasting into a ticket. For production code, use Prettier.
How to use JavaScript Formatter / Minifier
- Paste JavaScript.
- Choose Format or Minify.
Limitations
- Lightweight only — no AST-level transformations.
- May not handle all edge-case syntax.
Example
Input
const x=1;
Output
const x = 1;
FAQ
Frequently Asked Questions
Should I use this instead of Prettier?
No. Use Prettier in your project. This tool is for private, in-browser formatting of small snippets.
Does it support TypeScript or JSX?
Support is limited. TypeScript/JSX may fail or format poorly compared with a real parser.
Use Prettier instead?
For production code, use Prettier. This is for quick browser edits.
Is JavaScript Formatter / Minifier free to use?
Yes. JavaScript Formatter / Minifier on ShadowReference is free, with no account, no watermarks, and no server-side processing.
Does this tool send my data to a server?
No. All processing happens locally in your browser. Your input never leaves your device.
Related