JavaScript Minifier / Beautifier

Free Online JavaScript Minifier & Beautifier

Minify JavaScript to reduce file size for production, or beautify minified code to make it readable again. All processing happens in your browser — your code is never sent to a server.

What Does JavaScript Minification Do?

Minification removes comments, unnecessary whitespace, and line breaks from JavaScript without changing the code's behavior. This reduces file size and can significantly improve page load times.

What Does Beautify Do?

Beautification takes compressed, minified, or poorly formatted JavaScript and adds proper indentation, line breaks, and spacing — making it easy to read and debug.

Frequently Asked Questions

Does minification change how the code works?

No. Minification only removes whitespace and comments. The logic and behavior remain identical. For deeper optimization (variable renaming, dead code removal), use a dedicated bundler like Webpack or esbuild.

Is this tool private?

Yes, 100%. All processing runs locally in your browser using JavaScript. Your code never leaves your machine.