CSS Minifier
Compress CSS by removing whitespace, comments and redundant rules.
Free to use · No sign-up · Runs in your browser · Your data is never uploaded.
What the CSS Minifier does
The CSS minifier compresses your stylesheets by removing comments, whitespace and redundant characters, reducing the bytes a browser must download.
How it works
The tool strips comments, collapses whitespace and removes the final semicolons and other optional characters from your CSS, producing a smaller file that behaves identically.
Smaller CSS files load faster and reduce render-blocking time, which helps your Core Web Vitals scores.
How to use the CSS Minifier
- 1Paste your CSS.
- 2Run the minifier.
- 3Check the size reduction.
- 4Copy the minified CSS.
- 5Deploy it and confirm your styles still apply.
CSS Minifier questions
No, as long as your CSS is valid. The tool only removes characters that do not affect the rules.
No. Keep readable CSS while developing and minify for production.
Typical savings are 15 to 40 percent, depending on how many comments and how much whitespace your file contains.
Yes. Smaller stylesheets reduce render-blocking time, which improves metrics such as Largest Contentful Paint.
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