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CSS Minifier – Compress CSS for Faster Pages

Shrink your CSS by stripping whitespace/comments, optimizing zeros, and supporting modern features so pages load faster on every device.

🟢 Runs locally · no uploads

CSS Minifier

Compress and minify CSS to reduce file size by up to 40%

code CSS Input
.header { background-color: #ffffff; padding: 20px; }
check_circle Minified Output
compress
Minified CSS will appear here
Keyboard Shortcuts: Ctrl+V to paste • Ctrl+Enter to minify

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› About this tool · FAQ

Stop using bloated CSS files! Minify and compress CSS instantly by removing whitespace, comments, and optimizing properties for 30-40% smaller file sizes. Improves page load speed, reduces bandwidth, and optimizes for production. Supports modern CSS including variables, Grid, Flexbox, and media queries. Free, works offline, unlimited minification.

How do I minify CSS?

Paste your CSS code, configure minification options (remove comments, whitespace, optimize colors/zeros, merge rules), and minify. The tool compresses CSS instantly with detailed file size reduction statistics.

Is this CSS minifier free?

Yes, completely free with unlimited minification. No signup required, no watermarks. All compression happens in your browser for complete privacy of stylesheets and code.

Are CSS files uploaded to servers?

No, all CSS minification happens locally in your browser. Files never leave your computer, ensuring complete privacy for proprietary stylesheets and client projects.

Will CSS minification break my styles?

No, minification only removes unnecessary characters and optimizes values while preserving functionality. The visual appearance of your styles remains exactly the same.

How much can I expect to reduce file size?

Typical reduction is 20-40% depending on your CSS structure. Highly commented or formatted CSS can see even greater reductions.

Are CSS variables and modern features supported?

Yes! The minifier preserves CSS custom properties (variables), calc() functions, CSS Grid, Flexbox, and other modern CSS features.

Should I minify CSS for development?

No, keep readable formatting during development. Minification is best applied during your build process or before production deployment.

Can I preserve certain comments in minified CSS?

Important comments (like copyright notices) starting with /*! are automatically preserved even when comment removal is enabled.