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Compress and minify your CSS code to reduce file size and improve page load speed — instantly in your browser.
CSS Minifier
Minify CSS code and reduce file size instantly.
Minified CSS will appear here.
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Why use our CSS Minifier?
Maximum Compression
Strips all whitespace, comments, and unnecessary characters to produce the smallest possible CSS output.
Size Reduction Stats
See exactly how many bytes you saved and the percentage reduction after minification.
Fully Private
All minification runs locally in your browser. Your CSS is never sent to any server.
Instant Results
Paste your CSS and get minified output immediately — no delays, no page reloads.
Why Minify CSS?
How to Compress CSS
Frequently Asked Questions
Why minify CSS?
Minified CSS has smaller file sizes, which means faster page loads, lower bandwidth usage, and better Core Web Vitals scores — all of which directly impact SEO rankings and user experience.
Will minified CSS still work correctly?
Yes. Minification only removes unnecessary whitespace and comments. It does not change how the CSS rules apply — your styles will behave exactly the same.
Should I minify CSS in development?
No — keep readable CSS during development for easy debugging. Minify only in your production build, typically using your build tool (webpack, Vite, etc.) automatically.
Does it handle CSS variables and custom properties?
Yes. Modern CSS features including variables (--custom-property), calc(), clamp(), grid, and flexbox are fully preserved during minification.