Remove CSS comments, collapse whitespace, and reduce file size instantly — no external libraries
Developer Tools
CSS Minifier - Minify & Compress CSS Online
How to Use
1Paste your CSS into the input area
2The minified CSS appears instantly in the output
3Check Original Size, Minified Size, and Savings stats
4Copy the minified result with one click
Frequently Asked Questions
CSS Minifier removes block comments, collapses redundant whitespace and newlines, and strips unnecessary spaces around punctuation ({, }, ;, :, ,). The result is functionally identical CSS that loads faster because it is smaller.
Yes. Minification only removes characters that have no effect on how the browser renders your styles. The browser interprets the minified CSS exactly the same as the original.
Typical savings range from 20% to 50% depending on how much whitespace and how many comments are in the original file. Larger, well-commented files tend to compress more.
No. All processing is done entirely in your browser using JavaScript. Your CSS never leaves your machine.