CSS Minifier Online

Minify and compress CSS by removing whitespace and comments. Free online CSS minifier — see exact byte savings. Instant results, no login needed.

Remove Comments Strip Whitespace Show Savings Instant Free

Paste your CSS

Minified Output

Quick reference

What it is

Removes all whitespace, line breaks, and comments from CSS — making the file smaller and faster to load, with no visual change.

How to use it

Paste your CSS into the input
Click Minify CSS
The minified output appears with a size report
Click Copy Output to use it in your project

When you need this

Before deploying CSS to production
Reducing page load time on a live website
Combining multiple CSS files into one minified block
Checking how much whitespace is in your CSS

Good to know

Comments like /* this */ are completely removed
Minified CSS is functionally identical to the original
For production use a build tool like Vite or Webpack
You can typically save 20-40% of file size on CSS files

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