CSS Minifier & Beautifier
Minify CSS for production or beautify minified CSS into readable, indented rules — with a size comparison.
Why minify CSS?
Every space, newline and comment in a stylesheet travels over the network to your visitors. Minifying removes them and typically shrinks CSS by 20–40%, which directly speeds up first paint on slow connections. Minification is safe for browsers: they never needed the whitespace in the first place. Keep the readable original in your source code and deploy the minified version.
Frequently asked questions
What exactly does the minifier remove?
Comments, leading/trailing whitespace, line breaks and redundant spaces around punctuation; plus the final semicolon before a closing brace. It does not rename classes or merge rules — that is the job of full build pipelines.
Is my CSS uploaded?
No. All processing happens in your browser with plain text operations — nothing is transmitted.