How can I minify CSS and JavaScript online?

Choose JavaScript mode for scripts or CSS mode for stylesheets, paste your code, and copy the minified output. HTML mode is available for markup cleanup in the same workflow.

Can I use this as a JS CSS minifier?

Yes. This page now supports JavaScript, CSS, and HTML modes so quick JS CSS minifier workflows can stay on one page.

Does this handle ES6+ syntax?

This does basic minification (comment/whitespace removal). For advanced JS optimization, use Terser.

Will minification break my code?

Basic minification is safe. Always test your output after minifying.

Developer Tools

Minify CSS and JavaScript | JS, CSS & HTML Minifier

Use this free workflow to minify CSS and JavaScript online, plus HTML cleanup in the same browser session.

JavaScript input

7 lines • 143 chars

Paste your JavaScript, keep line numbers visible, and minify or copy the result inside fullscreen mode.

Quick examples

Saved 37 bytes (25.9%)

function handleClick(userName){const message="Hello,"+userName;console.log(message);}handleClick("Aisha");