CSS Minifier — Minify CSS Online

Paste CSS to remove comments and collapse whitespace. Does not fetch external stylesheets — paste-only.

How to use
  1. Paste your CSS in the input box.
  2. Minified output updates automatically.
  3. Click Copy to copy the compact CSS.
Frequently asked questions
What does CSS minification remove?
Comments and unnecessary whitespace outside of strings.
Can it minify linked stylesheets?
No. Copy CSS from your file or DevTools and paste it here.
Will minification change selectors?
No. Only whitespace and comments are removed — rules stay the same.
Is my CSS sent to a server?
No. Minification happens entirely in your browser.
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