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Minify CSS Online

Production-ready CSS minification: strips whitespace / comments, shortens color codes where possible (e.g. #FFFFFF to #FFF), removes trailing semicolons, and outputs the smallest possible CSS that's still valid. Drop in your CSS, get back minified ready-to-deploy code.

When to use this

Use for: deploying CSS to a CDN / hosting where size matters, embedding CSS in HTML emails (every byte counts), minifying critical-path inline CSS for above-the-fold rendering, preparing CSS for any size-conscious deployment.

Frequently Asked Questions

Will minification break my CSS?

No - minified CSS is byte-equivalent to the source semantically. We only strip whitespace, comments, and redundant characters. CSS rules, selectors, and values are preserved exactly.

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Other targeted versions of this tool — each tuned for a specific use case.

Or use the main CSS Beautifier & Formatter if your use case isn't covered above.