What is this tool?
CSS Minifier removes all unnecessary characters from your CSS code — whitespace, comments, newlines, and redundant semicolons — producing the smallest possible output while keeping the stylesheet functionally identical. This is essential for production-ready websites that need fast load times.
Why use this tool?
Minified CSS files load faster, consume less bandwidth, and improve your site's Core Web Vitals scores. This browser-based tool processes your CSS instantly with zero server uploads. You can see the exact size reduction percentage so you know how much you're saving.
Tips & Best Practices
- Keep the original unminified CSS in your source code for readability
- Minify CSS as part of your build pipeline for production deploys
- Combine multiple CSS files before minifying for even greater savings
- Test your pages after minification to ensure nothing breaks
Frequently Asked Questions
Is my data safe?
Yes. Everything runs in your browser. No data is ever sent to a server.
Does this remove vendor prefixes?
No. This tool only strips whitespace, comments, and unnecessary characters. All vendor prefixes and actual CSS rules are preserved.
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