How do I minify CSS online?

Paste your CSS into the CSS Minifier and click Minify. It removes all whitespace, comments, and unnecessary characters to reduce file size.

How much does minifying CSS reduce file size?

CSS minification typically reduces file size by 20-40%. Well-commented stylesheets can see even larger reductions by removing all comment blocks.

Does minifying CSS break the styles?

No, minification only removes whitespace, comments, and optional characters. The resulting CSS is functionally identical to the original.

What is the difference between minification and compression?

Minification removes unnecessary characters from code. Compression (like Gzip or Brotli) is applied by the web server to reduce transfer size further.

Should I minify CSS in development?

No, keep readable CSS during development. Minify only for production deployments to maintain code readability for debugging.

CSS Minifier

ⓘ

Quick Answer

CSS minification removes whitespace, comments, and unnecessary characters from stylesheets to reduce file size and improve page load speed — typically cutting file size by 20-40%. Paste your CSS and click Minify to get production-ready compressed code instantly.

Paste CSS to minify it. Shows byte savings and percentage reduction.

Input CSS

Minified Output

Cite This Tool

CSS Minifier. (2026). DevTools Online. Retrieved from https://devutilitypro.com/css-minifier/

Developer Tools Assistant

···

Need Fast, Reliable Hosting for Your Dev Projects?

Cloudways managed cloud hosting — no server management, scales instantly.

See Cloudways Pricing →

Sponsored

Protect Your Dev Environment

Stay secure on public networks. NordVPN encrypts your connection with military-grade security. 30-day money-back guarantee.

Get NordVPN — 40% Off Today

⚡ Sponsored

WP Rocket — The #1 WordPress Cache Plugin

Trusted by 5M+ websites. Boosts Core Web Vitals and page speed in minutes. Single $59 · Growth $119 · Multi $299+

Get WP Rocket →

Affiliate partner — we may earn a commission at no extra cost to you.

Was this tool helpful?

Cite This Tool