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How to Minify CSS

3 min read · Updated October 2026

A stylesheet loaded on every page is worth shrinking. Minified CSS is the same styles with fewer bytes, so pages render sooner.

Try it now: CSS Minifier

Free, no sign up, and the file stays on your device.

Open CSS Minifier

How to minify

  • Open CSS Minifier and paste your CSS.
  • Copy the minified result.
  • Save it as styles.min.css and link it from your pages.

Good practice

  • Keep a readable copy as your source.
  • Test your pages after switching.
  • Combine with caching and compression on your server.

Frequently asked questions

Is my data uploaded?

No. Everything runs in your browser, so what you type never leaves your device.

Ready to start?

Open CSS Minifier