Minify and compress CSS online, free. CSS is the stylesheet language that controls the presentation of web pages. This minifier strips comments and unnecessary whitespace from CSS to shrink file size for production — processing runs in your browser with nothing uploaded.
It safely removes comments and redundant whitespace so your CSS downloads faster, without changing how it behaves. 100% free, no registration, and complete privacy — everything runs locally in your browser, so your data never touches a server.
Remove whitespace and comments to cut CSS payload size and speed up page loads.
Minification runs immediately and preserves behaviour — only formatting characters are removed.
Your CSS is minified locally in JavaScript; nothing is uploaded, logged, or stored.
Unlimited minification with no account or quota, on desktop and mobile.
Paste your CSS into the input box and click Minify. The minifier runs instantly in your browser and shows the result on the right — no upload, no signup, no installation.
Yes. The CSS minifier is completely free with no limits, no account, and no watermark. All processing happens locally in your browser for privacy.
No. Your CSS never leaves your device — it is processed locally in JavaScript. We don't upload, log, or store your input, so it's safe for proprietary code and config.
No. Minifying only removes comments and redundant whitespace; the behaviour of your CSS is preserved. Keep your unminified source for future edits.
Yes. The tool is fully responsive and works on phones, tablets, and desktops — just open it in any modern browser.