CSS Minifier
Minify CSS to reduce file size for production.
Every byte of CSS blocks rendering, so shipping a minified stylesheet is one of the easiest page-speed wins.
About CSS Minifier
Strip whitespace, comments, and redundant characters from CSS to produce a smaller, production-ready stylesheet that loads faster. This CSS minifier is useful when a build pipeline isn't available and you need a quick one-off minification for a static site or email template.
Every byte of CSS blocks rendering, so shipping a minified stylesheet is one of the easiest page-speed wins. The CSS minifier removes comments, whitespace and redundant characters, merges duplicate rules where safe, and shortens values — often cutting file size by 20–40%. It uses a well-established compression engine and runs locally in your browser.
How to use CSS Minifier
- Paste your stylesheet into the input box.
- Run the minifier to compress it.
- Compare the original and minified sizes.
- Copy the minified CSS into your project or download it.
Key features
- Strips comments, whitespace and unnecessary semicolons.
- Structural optimisation that merges and shortens rules safely.
- Shows size savings so you can see the impact.
- No upload — your source code stays private.
Common use cases
- Compressing a hand-written stylesheet for a small static site.
- Producing a compact critical-CSS block to inline in the <head>.
- Quickly minifying CSS for an email template or CMS theme without a build tool.