CSS Minifier — Minify CSS Online Free
Paste your CSS below and compress it in seconds. This CSS minifier strips comments and unnecessary whitespace, safely protecting string values, to shrink your stylesheets and speed up your website. 100% client-side — your code never leaves your browser.
CSS Minifier FAQ
CSS minification removes unnecessary characters from your stylesheet — comments, whitespace, extra semicolons and line breaks — without changing how the CSS works. Smaller CSS files load faster, which improves your page speed score.
Yes. String values such as content: "a b c" and url() paths are protected during minification, so nothing inside quotes or URLs is altered. Your code also runs entirely in your browser — nothing is uploaded anywhere.
Most stylesheets shrink by 30–60%. Files with heavy commenting and formatting shrink the most. The tool shows your exact before/after sizes and the percentage saved.
Yes, completely free with no registration, no limits and no watermarks. Use it as often as you like.
Yes, running already-minified CSS through the minifier is harmless — it simply returns the same compact code.
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