CSS Minifier
Remove whitespace and comments from CSS code instantly. See the size reduction and copy the minified output — free, browser-based, no upload.
What is CSS Minification?
CSS minification is the process of removing unnecessary characters from CSS code—whitespace, comments, and redundant semicolons—without changing how the styles function. Minified CSS loads faster because it reduces the file size that browsers need to download, which is a key factor in web performance and Core Web Vitals scores.
What This Minifier Does
- Removes all CSS comments (
/* ... */) - Removes whitespace around braces, colons, semicolons, and commas
- Removes the last semicolon before
} - Collapses multiple spaces into single spaces
When to Minify CSS
- Before deploying a website to production
- When optimizing page load speed and Lighthouse scores
- When your hosting plan has bandwidth limits
- As part of a build pipeline (alongside Webpack, Vite, or Gulp)
Frequently Asked Questions
Can I revert minified CSS back to readable CSS?
Minification is effectively a one-way process for the comments (they are permanently removed). To get formatted CSS from minified code, use our HTML Formatter or a dedicated CSS beautifier — the whitespace can be restored but lost comments cannot.
Does minification affect CSS variables or animations?
No. This minifier only removes whitespace and comments. CSS custom properties, keyframe animations, and all functional CSS are preserved exactly.