Optimize your CSS and speed up your website using our free online CSS minifier. This tool helps developers shrink file sizes by stripping away unnecessary whitespace, comments, and formatting while keeping styles intact.
Search for a command to run...
Tip
Keep your original CSS files for editing and use the minified versions only for your production server.
Did You Know?
CSS minification can reduce file sizes by up to 20% by simply removing comments and extra whitespace.
CSS (Cascading Style Sheets) is the standard language used to style the layout and appearance of web pages. While developers use spaces, indentation, and comments to make CSS human-readable during development, web browsers do not need these elements to interpret the code. Minification bridges the gap by converting developer-friendly code into a compact version optimized for production performance.
Best Practice
Combine multiple CSS files into one and then minify them to reduce the number of HTTP requests.
cssnano plugin in your Vite, Webpack, or Rollup configurations.clean-css-cli allow you to automate minification from the terminal or npm scripts.Q: Will minifying my CSS break my website's design? A: No, minification only removes unnecessary characters like whitespace and comments; it does not change the logic or the way the browser interprets your styles.
Q: What is the difference between minification and GZIP compression? A: Minification removes source code characters, while GZIP is a server-level compression that shrinks the file during transfer. Using both provides the best performance.
Q: Should I minify my CSS during development? A: No, it is best to keep your CSS formatted for readability during development and only minify it as part of your deployment or build process.
Q: Can I reverse minification if I lose my original file? A: You can use a CSS Formatter to make the code readable again, but original comments and specific manual formatting will be lost forever.
Best Practice
Always use source maps when deploying minified CSS to make production debugging easier in browser developer tools.