CSS Minifier
Compress CSS by removing comments, whitespace, and redundant characters. See exactly how many bytes you save.
Input CSS
Minified CSS
About CSS Minifier
CSS minification strips characters that browsers don't need — comments, whitespace, and redundant syntax — to produce a smaller file that transfers and parses faster. Even a 20–30% reduction in CSS size can improve Time to First Byte and First Contentful Paint.
What gets removed
- Comments — All
/* ... */comment blocks. - Whitespace — Spaces, tabs, and newlines around selectors, properties, and values.
- Trailing semicolons — The last property in a block doesn't need a semicolon.
- Zero units —
0px,0em,0%→0.
FAQ
No — a correctly written CSS file will produce identical rendering after minification. The transformations are all semantically equivalent.
No. All processing runs in your browser. Nothing is ever sent to a server.