CSS Minifier | Compress Stylesheets
Remove comments, line breaks, and unnecessary spaces from CSS to reduce stylesheet size before deployment or embedding.
Compress CSS for Smaller Files
Remove extra whitespace, comments, and line breaks from CSS rules so embedded styles or lightweight stylesheet files take fewer bytes.
Minify a Copy, Not the Source
Keep your readable source CSS for maintenance. Use the minified output for deployment, embeds, prototypes, or quick tests where compact code is more useful.
What to Check Before Publishing
Review critical selectors, calc expressions, CSS variables, data URLs, and browser-specific hacks after minification, especially when the original stylesheet came from multiple sources.
About This Tool
CSS Minifier compresses a stylesheet by removing whitespace, comments, and redundant characters to produce the smallest possible file size. Smaller CSS files load faster and reduce bandwidth on every page view.
When to Use It
Use this before deploying CSS to production, when a performance audit recommends reducing render-blocking resource size, or when optimising a stylesheet served to millions of users.
How to Use
- Paste your CSS into the input area.
- Click Minify to remove whitespace and comments.
- Copy the minified output.
- Replace the original file with the minified version on your server.
Frequently Asked Questions
How much smaller does CSS get after minification?
Typical compression reduces file size by 20 to 40 percent. Files with many comments or verbose spacing compress more.
Should I keep the original CSS alongside the minified version?
Always keep the original unformatted source. Minified CSS is difficult to edit directly. Use a build tool to generate minified output from source automatically.
Is minification the same as gzip compression?
No. Minification removes unnecessary characters at the code level. Gzip or Brotli compression is applied at the HTTP level by the server and further reduces transfer size.