CSS Minifier

Paste your CSS code, get minified output instantly. Remove comments, whitespace, and optimize your stylesheets — all client-side.

What Is CSS Minification?

CSS minification is the process of removing unnecessary characters from CSS code without changing its functionality. This includes stripping comments, removing extra whitespace and line breaks, eliminating redundant semicolons, and collapsing spaces around selectors and properties. The result is a smaller file that loads faster in web browsers.

Why Minify CSS?

Minified CSS files are smaller, which means faster download times for your users. Every kilobyte matters for page load performance, especially on mobile networks. Smaller CSS files also reduce bandwidth usage and can improve your Core Web Vitals scores. Search engines consider page speed as a ranking factor, so minified CSS contributes to better SEO.

How to Use This CSS Minifier

  1. Paste your CSS into the input area on the left.
  2. View the minified result on the right, updated in real time.
  3. Check the stats to see original size, minified size, and bytes saved.
  4. Copy the output with one click and use it in your project.
  5. Beautify minified CSS back into readable format using the Beautify button.

What Does This Tool Remove?

  • Comments — both single-line and multi-line CSS comments are stripped.
  • Whitespace — extra spaces, tabs, and newlines are removed or collapsed.
  • Trailing semicolons — the last semicolon before a closing brace is removed.
  • Redundant spaces — spaces around colons, semicolons, braces, and commas are collapsed.

Privacy and Security

This CSS minifier runs entirely in your browser. Your code is never sent to any server. All processing happens client-side using JavaScript, so your stylesheets remain private and secure.