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CSS Minifier

Free CSS minifier online — compress CSS code to reduce file size and improve website loading speed. No signup required.

Minify CSS code to reduce file size and improve website performance. Remove whitespace, comments, and unnecessary characters. Works 100% in your browser.

CSS Input
Minified CSS
Legal Disclaimer / Yasal Uyarı: This tool processes all data locally in your browser. No CSS code is sent to any server. / Bu araç tüm verileri tarayıcınızda yerel olarak işler. Hiçbir CSS kodu sunucuya gönderilmez.

About CSS Minifier

CSS minification is the process of removing unnecessary characters from CSS code without changing its functionality. This includes removing whitespace, comments, and unnecessary semicolons. Minified CSS loads faster, reducing page load times and improving user experience. This free online tool helps you compress your CSS for production use.

How to Use

  1. Paste your CSS code in the left panel.
  2. Adjust minification options (remove comments, whitespace, etc.).
  3. Click Minify to compress your CSS.
  4. View file size savings in the stats section.
  5. Use Copy to copy the minified CSS or Download .css to save as a file.

Minification Features

  • Removes CSS comments (/* ... */)
  • Removes unnecessary whitespace and line breaks
  • Removes last semicolons in rule blocks
  • Combines multiple spaces into single spaces
  • Removes zero units (0px → 0)
  • Preserves CSS functionality and selectors

Frequently Asked Questions

Why should I minify my CSS?

Minified CSS files are smaller and load faster, improving your website's performance. Smaller files mean less bandwidth usage for both you and your users, and faster page rendering in browsers.

Is my CSS code kept private?

Yes, completely. All minification happens locally in your browser using JavaScript. No CSS code is ever transmitted to any server or stored anywhere.

Will minification break my CSS?

No, proper minification only removes unnecessary characters without changing the functionality. However, we recommend testing your minified CSS on a staging environment before deploying to production.

How much size reduction can I expect?

Size reduction varies depending on your CSS. Typically, you can expect 10-30% reduction for well-formatted CSS with comments, and up to 50% or more for CSS with extensive comments and whitespace.

Should I keep the original CSS file?

Yes, always keep your original, unminified CSS file for development and debugging. Use the minified version only for production deployment. Consider using a build process that generates minified files automatically.