⚙

CSS Minifier

Compress CSS by removing comments, whitespace, and redundant code. Shows exact byte savings and compression ratio. Everything runs in your browser — no server, no tracking.

Developer Tools Runs locally No data sent
css minify compress optimize client-side only
Options:
CSS Input
0 bytes
→
Minified CSS
0 bytes
💡
CSS Minifier removes comments and unnecessary whitespace to reduce file size without changing functionality. Use the CSS Formatter tool if you need to beautify minified CSS for editing. Typical compression: 20-40% smaller.

What is CSS Minifier?

Minify and compress CSS code instantly. Remove comments, whitespace, and redundant code to reduce file size for production. Free, browser-based, no data sent.

How to Use CSS Minifier

  1. Paste your CSS into the input panel.
  2. Run the minifier to remove whitespace and other nonessential characters.
  3. Review the compact output to make sure the stylesheet still looks correct.
  4. Copy or download the minified CSS for deployment or embedding.

Related Tools

📝
CSS Formatter
Beautify or minify CSS code with customizable formatting
 ⚙
JS Minifier
Compress JavaScript using Terser - mangle and minify
 📄
HTML Formatter
Beautify or minify HTML with customizable indentation
Understand CSS Minification ▾
Example
Input \n.btn {\n color: red;\n padding: 8px 16px;\n}
Output .btn{color:red;padding:8px 16px}
Common Use Cases
  • Reduce stylesheet size before deployment
  • Compact CSS for embeds or snippets
  • Compare formatted and minified output while debugging
  • Prepare smaller style payloads for static sites or emails
Frequently Asked Questions
Will minifying CSS break my styles?

No. The minifier only removes characters that have no effect on CSS parsing -whitespace and comments. The minified output is functionally identical to the original.

Should I keep the original formatted CSS?

Yes. Always keep the human-readable source file in your repository and only deploy the minified version. Use a source map if you need to debug minified CSS in browser DevTools.

How much file size reduction can I expect?

Typical savings range from 20% to 50% depending on how much whitespace and comments the original file contains. Additional savings come from gzip compression at the server level.

Does the minifier support CSS custom properties (variables)?

Yes. CSS custom properties (--my-var: value) are preserved exactly as written during minification.