CSS Minifier
Minify your CSS code to reduce file size and improve loading performance. Includes auto-prefixer for better browser compatibility.
Minified CSS will appear here...
Minification
Remove comments, whitespace, and unnecessary characters to reduce file size.
Auto-Prefixer
Automatically add vendor prefixes for better cross-browser compatibility.
Download
Download the minified CSS as a .min.css file ready for production use.
Performance optimization made simple
My Lighthouse scores were suffering because of bloated CSS files. I was tired of manually removing comments and whitespace, and even more tired of dealing with browser compatibility issues. This CSS Minifier is my solution to the performance headaches that every frontend developer faces.
Real-world scenarios where this saves the day:
- Optimizing CSS bundles before deployment to improve Core Web Vitals
- Adding vendor prefixes for older browsers without breaking modern ones
- Cleaning up CSS from design tools like Figma or Sketch
- Comparing before/after to see exactly what's being optimized
Performance tip: Every kilobyte counts on mobile. Minify your CSS, enable auto-prefixer for maximum compatibility, and watch your PageSpeed Insights scores improve. Your users will notice the difference.
Built this tool because I believe performance optimization shouldn't be complicated. Drop in your CSS, get optimized output, and deploy with confidence. No more excuses for slow websites.