Free Online CSS Minifier
Minify CSS to reduce file size and improve page load times. Remove whitespace, c...Minify CSS to reduce file size and improve page load times. Remove whitespace, comments, and unnecessary formatting with size reduction stats.
Minified CSS will appear here...
Minifier Features
Why Use Free Online CSS Minifier?
Faster Page Loads
Smaller CSS files mean faster downloads and improved Core Web Vitals scores.
Format Option
Also includes a CSS formatter to beautify minified code back to readable format.
100% Client-Side
Your CSS never leaves your browser. Complete privacy and security guaranteed.
Free Forever
No hidden fees, no subscriptions. Minify unlimited CSS completely free.
Preserve Important Comments
Option to keep important comments (containing !) while removing everything else.
Size Reduction Stats
See exactly how much smaller your minified CSS is with percentage displayed.
Common Uses for CSS Minifier
Production Deployment
Minify CSS before deploying to production for faster page loads and better performance.
Performance Optimization
Reduce CSS file sizes to improve Core Web Vitals and Google PageSpeed scores.
CDN Optimization
Smaller CSS files reduce CDN bandwidth costs and improve cache efficiency.
Mobile Performance
Faster CSS loading on mobile networks improves user experience on slower connections.
How It Works
Paste Your CSS
Copy your CSS code from your stylesheet and paste it into the input box. Works with any valid CSS.
Choose Options and Click Minify
Optionally preserve important comments (starting with !), then click Minify to compress your CSS.
Copy and Use
One-click copy to clipboard. Use the minified CSS in production for faster page loads.
Tips & Best Practices
Preserve Important Comments
Use the 'Preserve important comments' option to keep license headers and copyright notices that contain '!' in your minified output.
Also Format CSS
Use the Format button to beautify minified CSS - useful when debugging or reviewing third-party stylesheets.
Compile Preprocessors First
If using SCSS, LESS, or Stylus, compile to standard CSS first before minifying for best results.