Minify CSS Online
CSS minification reduces file size by removing whitespace, comments, and redundant syntax without changing the functionality of the styles. Smaller CSS files load faster, reduce bandwidth consumption, and improve page performance scores in tools like Google Lighthouse and PageSpeed Insights. While build tools like webpack, Vite, and Parcel handle minification automatically in production builds, there are many situations where you need to manually minify CSS: preparing a CSS snippet for a CDN, embedding styles in an HTML email, adding styles to a CMS that does not process assets, or simply checking how much a file can be compressed. This tool minifies CSS instantly in your browser, showing you the size reduction achieved.
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FAQ
- How much does CSS minification reduce file size?
- Typical CSS files see 20-40% size reduction from minification alone. Combined with gzip compression, the network transfer size reduction can be 70-80% compared to uncompressed, unminified CSS.
- Is minified CSS safe to use in production?
- Yes. Minification only removes whitespace, comments, and unnecessary syntax. The behavior of the CSS rules is identical. Always test minified styles to confirm visual correctness.
- Does minification remove unused CSS?
- No. Minification only compresses the syntax; it does not remove CSS rules that are unused by any HTML. For removing unused CSS, use PurgeCSS or a tree-shaking CSS tool.