CSS Minifier Online
Minify your CSS code instantly online. Reduce file size, remove whitespace and comments. Free, no signup, runs in your browser.
CSS Input
0 bytes
Minified Output
0 bytes
How to minify CSS
- Paste your CSS code in the left panel or click Sample to try an example.
- Click Minify — the compressed CSS appears instantly on the right.
- Click Copy or Download to use your minified CSS.
Frequently Asked Questions
What does CSS minification do?
It removes whitespace, comments, and unnecessary characters from your CSS without changing how it works. This reduces file size and speeds up your website.
Is my code sent to a server?
No. Everything runs in your browser with JavaScript. Your CSS code never leaves your device.
How much can minification reduce file size?
Typically 20–60% depending on how much whitespace and comments your original CSS contains.
Will minified CSS still work the same?
Yes. Minification only removes formatting — the CSS rules themselves are not changed.
