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CSS Minifier — Compress CSS Online Free

Minify CSS to Reduce File Size and Speed Up Websites

Minify CSS by removing whitespace, comments, and redundant code. Also beautify/format minified CSS back to readable form. Smaller CSS files load faster and improve website performance.

⚡
Instant
Seconds to process
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Secure
Files never stored
🆓
100% Free
No account needed
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How to Use CSS Minifier

1

Paste your CSS code

2

Click Minify to compress or Beautify to format

3

Copy the output CSS

Frequently Asked Questions

Typically 20–50% reduction. CSS files with lots of comments and whitespace compress the most.
Yes! Paste minified CSS and click Beautify to convert it back to readable formatted code.
No. Minification only removes whitespace and comments, not any actual styles or logic.

Learn More

tutorial
Why Minifying CSS Can Break Your Layout (calc(), !important, and Other Gotchas)
5 min read

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