CSS Minifier

Minify CSS using a CSS parser while keeping structural rewriting disabled.

Input

How css minifier works

CSSO parses the stylesheet and writes compact CSS without rule restructuring.

Enter your values or text in the tool form.
Review the result as you change the inputs, or select the action button for code tools.
Copy the result or download it where a download option is available.

A declaration with expanded whitespace is serialized with compact punctuation and values.

Check the result in target browsers, especially when using vendor-specific syntax or preprocessors.

How does css minifier work?

CSSO parses the stylesheet and writes compact CSS without rule restructuring.

What should I check before using the result?

Check the result in target browsers, especially when using vendor-specific syntax or preprocessors.

Is CSS Minifier free to use?

Yes. CSS Minifier is free, browser-based, and does not require signup.

Does this tool save my data?

Tool inputs are processed on your device. File tools do not upload your files. Website analytics are described in the privacy policy.

Can I use it on mobile?

Yes. The page is responsive and works on modern mobile, tablet, and desktop browsers.

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Reviewed 2026-10-24. By Mahad and Mehdi Developers.