CSS Minifier
Minify CSS code to reduce file size and improve page load times. Free, fast, and runs in your browser.
Input CSS
Minified CSS
How to Use the CSS Minifier
Paste your CSS code in the left panel. The minified output appears automatically in the right panel. Use the copy button to grab the result. All processing happens in your browser.
What is CSS Minification?
CSS minification is the process of removing unnecessary characters from CSS code without changing its functionality. This includes removing whitespace, comments, and redundant semicolons to reduce file size and improve page load performance.
Why Minify CSS?
- Faster page loads — Smaller files download faster, especially on mobile networks.
- Lower bandwidth costs — Reduced file sizes mean less data transfer.
- Better Core Web Vitals — Smaller CSS files improve FCP and LCP scores.
- Production best practice — All major frameworks minify CSS for production builds.
Related Guides
- CSS Minification Explained — why and how to minify CSS for production
- How to Format and Beautify CSS — the reverse workflow for development
- CSS Performance: Core Web Vitals — measure the real impact on page speed
FAQ
Is my CSS safe?
Yes. All minification happens in your browser. No CSS is sent to any server.
Will minification break my CSS?
No. The minifier only removes whitespace, comments, and redundant characters.
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CSS Minification Explained: Why and How to Minify CSS
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