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CSS Minifier

Minify CSS to make files smaller and pages faster.

How it works

  1. 1Paste your CSS.
  2. 2It is minified as you type.
  3. 3Copy or download the result.

Features

  • Shows the size before and after.
  • Colors and values shortened.
  • Errors reported clearly.
  • Private: runs in your browser.

Frequently asked questions

How does it compress?

CSSO removes whitespace and comments, shortens colors and values, and merges duplicate rules.

Can I undo it?

Use the CSS Formatter to make minified code readable again (renamed variables stay renamed).

Is my data sent anywhere?

No. Everything runs in your browser; nothing is uploaded.

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