JavaScript Beautifier & Minifier Online
Free online JavaScript formatter: beautify messy JS with 2/4/8-space indentation or minify it — 100% in your browser, no upload.
About JavaScript Formatter
JavaScript Formatter cleans up your code: paste minified or messy JavaScript and get it properly indented and readable, or go the other way and minify it for production. Everything runs locally in your browser — your code is never sent to a server.
How to use JavaScript Formatter
- Paste your JavaScript into the input box.
- Choose the indent size, then click Beautify to pretty-print — or Minify to compress.
- Copy the result or download it as a .js file.
Frequently asked questions
Is JavaScript Formatter really free?
Yes — JavaScript Formatter is completely free, with no account, no watermark, and no usage limits. It runs entirely in your browser.
Are my files uploaded to a server?
No. All processing happens locally on your device using WebAssembly. Your files never leave your computer — close the tab and nothing remains.
Which browsers are supported?
Any modern browser on desktop or mobile: Chrome, Firefox, Safari, and Edge.
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