Minify CSS Online Free (No Upload)
Minify CSS (strip comments and whitespace) to shrink your files, in your browser.
85 → 57 characters (−33%)
🔒 100% client-side — no data sent
Shrink your CSS files by removing comments, whitespace and unnecessary line breaks. Minification speeds up page loads and improves your performance scores. Everything runs 100% in your browser: no code is ever sent to a server.
What is it for?
- ▸ Slim down a stylesheet before deploying to production
- ▸ Cut load time and boost your PageSpeed score
- ▸ Optimize CSS for an HTML email or a landing page
- ▸ Quickly compress CSS without setting up a build tool
FAQ
Does minifying CSS change how my site looks?
No. Minification only removes unnecessary characters (spaces, comments, line breaks). The CSS rules stay identical, so your site renders exactly the same.
How much size can you save by minifying CSS?
It depends on your file, but you typically see a 10 to 30% reduction. The gain is even larger once you enable Gzip or Brotli compression on your server.
Can you un-minify (beautify) the CSS afterwards?
This tool focuses on minification. To keep readable CSS, always store your unminified source as your development version and only minify at build or deploy time.