CSS Minifier Pro
Minify CSS stylesheets online with a browser-based tool. Remove unnecessary whitespace and regular comments, check compression statistics, copy your output, and download your minified CSS file.
What Is CSS Minification?
CSS minification removes unnecessary formatting and selected comments to reduce stylesheet size. Smaller files can reduce transfer size and help deliver stylesheets more efficiently.
How to Use This Tool
Paste CSS into the input editor, select your options, and click Minify CSS. Review the output, copy it, or download it as a CSS file.
Frequently Asked Questions
Is this CSS Minifier free?
Yes. The tool runs in your browser and does not require a subscription, API key, or account.
Is my CSS uploaded to a server?
No. This tool processes your CSS locally in your browser and does not send your pasted CSS to an external minification server.
Will minification change my website design?
This lightweight minifier removes unnecessary formatting while preserving quoted strings and declaration order. It is not a full CSS parser. Test complex stylesheets before production use.
What happens to important license comments?
When the relevant options are enabled, comments beginning with /*! are preserved. Retain license comments whenever required by the original software license.
Can I download the minified CSS?
Yes. Click Download CSS to save the generated output as a minified.css file.
Does this tool require an API key?
No. The minification process runs locally using JavaScript. No external minification API is required.