CSS Minifier Online
Minify CSS instantly by removing comments and unnecessary whitespace. Everything runs in your browser — your code never leaves your device.
CSS input
Minification options
Why Use Our CSS Minifier?
100% Client-Side
Minify CSS entirely in your browser. Your code is not uploaded to any server.
Instant Compression
Paste CSS and get a smaller output immediately — no waiting, no queues.
Clean Output
Removes comments and unnecessary whitespace to keep your CSS compact and production-ready.
Works Anywhere
Use on desktop, tablet, or mobile. No extensions or apps needed.
Free Forever
No sign-up, no limits. Minify as much CSS as you need.
How to Minify CSS
Three simple steps
- 1
Paste CSS or upload a file
Paste your CSS into the input box, or upload a .css file from your device.
- 2
Click Minify
Click the Minify CSS button to generate a compact version of your stylesheet.
- 3
Copy or download
Copy the minified CSS to your clipboard or download it as a .min.css file.
Frequently Asked Questions
Is this CSS minifier free to use?
Yes. This tool is free with no registration and no limits.
Is my CSS uploaded to a server?
No. Minification runs entirely in your browser. Your CSS is not uploaded or stored.
What does CSS minification do?
It reduces file size by removing comments and unnecessary whitespace. Smaller CSS can help pages load faster.