CSS Minifier
Paste your CSS and get a compressed, production-ready version instantly.
Copied to clipboard!
About the CSS Minifier
Shrink your CSS files in seconds with our free online CSS minifier. Paste your stylesheet, press one button, and download a production-ready file that’s up to 50 % smaller—all without sending data to any server.
- ✅ 100 % client-side – nothing leaves your browser.
- ✅ Instant compression – strips comments, whitespace, and redundant rules.
- ✅ Boosts Core Web Vitals – smaller CSS = faster paints and higher SEO scores.
- ✅ Dark-mode ready – works with your existing theme toggle.
- ✅ Copy-to-clipboard – grab the minified CSS in one click.
Perfect for Bootstrap, Tailwind, custom CSS, or legacy stylesheets. Whether you’re optimising a landing page or prepping assets for a CDN, our tool helps you ship leaner, faster styles without touching the command line.
Frequently Asked Questions – CSS Minifier
No. All processing happens entirely in your browser. Your stylesheets never leave your device.
File-size reductions typically range from 15 % to 50 %, depending on the amount of comments, indentation and extra whitespace present in the original file.
No. The tool only removes comments and whitespace; all modern CSS features (variables, Flexbox, Grid, media queries, etc.) remain intact and functional.
Absolutely. Use it for personal, commercial or open-source projects without any cost or attribution required.
Currently the tool processes one file at a time. You can concatenate multiple stylesheets into a single file before pasting, or minify each file individually.