CSS Minifier - Compress CSS Online Free
Last updated: 2026-03-11
Your CSS file is 180KB. After minification it is 120KB. 33% reduction with zero visual change.
What Minification Removes
| Element | Before | After | Savings |
|---|---|---|---|
| Comments | /* Header styles */ | (removed) | 100% of comment bytes |
| Whitespace | margin: 0 auto; | margin:0 auto | ~15% |
| Newlines | One property per line | One line | ~10% |
| Last semicolons | color:red;} | color:red} | ~2% |
| Zero units | margin: 0px | margin:0 | ~1% |
Typical Savings
- Small CSS (under 10KB): 20-25%
- Medium CSS (10-100KB): 25-35%
- Large CSS with comments (100KB+): 30-50%
Minify your CSS - free, instant.
Open CSS Minifier →Related Tools
According to Google web.dev, minifying CSS is a core performance optimization.
As Lighthouse flags, unminified CSS affects page load speed.