CSS Minifier - Compress CSS Online
Paste or upload your CSS and click Minify. This tool removes comments, whitespace, and unnecessary characters — all in your browser.
CSS Minifier – Free Online Tool
Our CSS Minifier is a free online tool that helps you reduce the size of your CSS files. It works directly in your browser — no installation, no server processing, and fully offline-friendly. Simply paste your CSS, upload a .css file, and get the minified output instantly.
Minifying CSS makes your website faster by removing comments, unnecessary whitespace, and reducing file size without changing how your site looks.
Key Features
- Paste or Upload CSS: Copy and paste your code or upload a
.cssfile. - Instant Minification: One click to reduce CSS size.
- Copy & Download: Copy minified code or download as
.min.css. - 100% Client-Side: Your CSS never leaves your browser.
Why Use a CSS Minifier?
- ⚡ Faster Website Speed - Minified CSS loads quicker.
- 📈 Better SEO - Faster sites rank higher in search engines.
- 💾 Reduced Bandwidth Usage - Smaller CSS means less data transfer.
- 👌 Improved User Experience - Visitors enjoy quicker page loads.
Frequently Asked Questions
What does CSS minification do?
CSS minification removes whitespace, comments, and unnecessary characters from CSS code to reduce file size. The result is functionally identical but smaller, which means faster download and page load times.
How much can CSS minification reduce file size?
Typical savings are 15–30% depending on how many comments and how much whitespace the original CSS has. Combined with Gzip or Brotli server compression, total size reduction can reach 70–85%.
Is minified CSS safe to use in production?
Yes. Minification only removes whitespace and comments — it does not change the CSS rules or their behavior. Browsers parse minified CSS the same way as formatted CSS.
Should I keep the original CSS alongside the minified version?
Yes. Always keep your original, readable CSS source file for development. Use the minified version only for production deployment. A source map can link the minified output back to the original for debugging.
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