Toolsly
Minifier

CSS Minifier

Paste any CSS and get a single-line, minified version that's safe to drop into production. Comments, redundant whitespace and unnecessary semicolons are stripped; important comments (/*! … */) are preserved. The savings in characters and percent are reported. Runs entirely in your browser — your stylesheet never leaves this page.

Privacy

Runs entirely in your browser — nothing is sent to any server.

Cost

Free. No sign-up, no watermark.

Type

Minifier

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Frequently asked

Is CSS Minifier free to use?

Yes. CSS Minifier is completely free with no sign-up, no watermark, and no usage limits. Toolsly does not charge for any of its tools.

Do my files and data stay private?

Yes — CSS Minifier runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How does CSS Minifier work?

Open CSS Minifier, paste or fill in the input fields, and the result updates instantly. Everything runs in your browser — no upload, no waiting.

Which browsers does CSS Minifier support?

Any modern browser works — Chrome, Firefox, Safari, and Edge on desktop and mobile. CSS Minifier uses standard web APIs and does not require any plugin, extension, or sign-up.