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CSS Minifier

Strip whitespace, comments and redundant values from a stylesheet. Everything runs in your browser, so your CSS is never uploaded.

Original

0 B

Minified

0 B

Saved

0%

Minification only changes formatting, never meaning: strings, url() contents and calc() spacing are all preserved. Level 2 and 3 rewrite colour and unit values and are reversible, but check the result if your build pipeline is strict.

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What Is CSS Minifier?

The CSS Minifier strips whitespace, line breaks, and comments from your stylesheets and reports exactly how many bytes you saved. Choose a minification level, paste in your CSS, and copy lean production-ready output with any syntax errors flagged.

Who Uses the CSS Minifier?

Front-end developers use it to shrink stylesheets before deployment and to measure how much bloat comments and formatting add.

How to Use the CSS Minifier

  1. Paste your CSS into the input box.
  2. Pick a minification level and comment handling.
  3. Review the byte savings and any flagged errors.
  4. Copy the minified output into your production file.

Why Choose Our CSS Minifier?

  • Multiple minification levels for safe or aggressive output
  • Exact byte and percentage savings readout
  • Syntax errors flagged instead of silently mangled

Try the CSS Minifier above — it is free, fast, and works on any device. Bookmark this page to return whenever you need it.