CSS Minifier
Minify your CSS code to reduce file size and improve page load speed. Remove comments, whitespace, and unnecessary characters instantly.
Features
Smart Minification
Removes comments, whitespace, and redundant characters while preserving CSS functionality.
Size Reduction Stats
See exactly how much space you saved with original and minified file size comparison.
Client-Side Processing
Your CSS code is processed entirely in your browser. Nothing is uploaded to any server.
Works Everywhere
Use on any device with a modern web browser. No download, sign-up, or plugin needed.
How It Works
Paste CSS
Paste your CSS code into the input area or load a sample stylesheet.
Click Minify
Press the Minify CSS button to compress your stylesheet.
Copy Output
Copy the minified CSS and use it in your production site.
Frequently Asked Questions
How do I minify CSS online?▾
Paste your CSS code into the input area and click "Minify CSS". The tool removes comments, extra whitespace, and unnecessary characters to produce compact output.
Does minifying CSS break my styles?▾
No. Minification only removes formatting characters that browsers ignore. Your styles will render identically before and after minification.
How much smaller will my CSS be?▾
Results vary depending on your code, but typically you can expect 15-40% file size reduction. Code with many comments and generous formatting will see larger savings.
Should I keep the unminified version?▾
Yes. Always keep your original, readable CSS for development. Use minified CSS only for production deployment.
Can I undo minification?▾
You can use our CSS Formatter tool to re-format minified CSS with indentation and line breaks, making it readable again.
Is this tool free to use?▾
Yes, the CSS Minifier is completely free with no usage limits, no sign-up required, and no watermarks.