CSS Minifier: Minify CSS Instantly
CSS minifier that lets you minify CSS in your browser. Strip whitespace, comments, and dead rules to shrink stylesheets and speed up render.
How to use the CSS Minifier
- 1Paste your CSS into the input box.
- 2The minified output appears instantly on the right.
- 3Review the bytes-saved stat.
- 4Click Copy to grab the minified CSS.
What you can do with the CSS Minifier
Minify CSS online.
Strip whitespace, comments, and redundant characters from any stylesheet — paste in, copy out.
Compress a Tailwind or Bootstrap build.
Slim down framework CSS before shipping to production.
Minify CSS for WordPress.
Paste your theme stylesheet, copy the result into your child theme or a caching plugin.
Reduce CSS file size without a build tool.
No Node, no Webpack — just paste and copy.
CSS Minifier FAQs
Is the minifier safe to use on production CSS?+
Yes. It only removes whitespace, comments, and redundant tokens — selectors, properties, and values are preserved exactly.
Does the tool send my CSS anywhere?+
No. Minification runs entirely in your browser; nothing is uploaded.
How much smaller will my CSS get?+
Typically 15–40%, depending on how much whitespace and how many comments the original contained.
Will minifying break my CSS?+
No. Output is functionally identical — the same rules in fewer bytes.
Should I gzip on top of minifying?+
Yes. Minification and gzip/Brotli compound: combined, you can ship 80%+ less CSS over the wire.
Want your whole site this fast? Our team offers full website speed optimization — done for you .