CSS Minifier
Compress your CSS by removing comments, whitespace, and unnecessary characters. Make your stylesheets load faster.
Free Online CSS Minifier & Compressor
Reduce your CSS file size by removing unnecessary characters without changing functionality. This CSS minifier strips comments, extra whitespace, line breaks, and redundant semicolons to produce the smallest possible output. Smaller CSS files mean faster page loads, better Core Web Vitals scores, and improved SEO rankings.
What Gets Removed
All CSS comments (both single-line and multi-line), extra whitespace and indentation, line breaks and carriage returns, spaces around selectors and property delimiters, trailing semicolons before closing braces, and redundant whitespace inside property values. The tool preserves all functional CSS — your styles will render identically after minification.
Why Minify CSS?
Google's PageSpeed Insights specifically recommends minifying CSS as a performance optimization. Reducing CSS file size decreases download time, especially on mobile networks. It also reduces parsing time in the browser. For a typical 50KB stylesheet, minification can save 10-15KB — a meaningful improvement that compounds across multiple CSS files on a page.
Frequently Asked Questions
No. Minification only removes characters that don't affect how CSS is interpreted by browsers — whitespace, comments, and redundant characters. The visual output of your stylesheets remains identical.
Yes. Use the "Beautify CSS" button to add back readable formatting with proper indentation. However, comments removed during minification cannot be recovered.
Keep readable CSS during development for easier debugging. Minify only for production deployment. Most build tools (Webpack, Vite, etc.) handle this automatically, but this tool is useful for quick one-off minification or when you don't have a build pipeline.