CSS Minifier
Compress and minify CSS to reduce file size and speed up your website. No data sent to server.
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How to Use This Tool
- 1Paste your CSS code into the input box
- 2Click Minify to compress it (removes comments, whitespace, and optimises where safe)
- 3Or click Beautify to format minified CSS for readability
- 4View the size reduction percentage
- 5Click Copy to use the result
Frequently Asked Questions
How much can CSS minification reduce file size?
Typically 20–40% for hand-written CSS. Well-structured CSS with lots of comments and whitespace can compress by 50% or more.
Is it safe to minify CSS for production?
Yes. Minification only removes whitespace and comments — it doesn't change how the CSS works.
Should I use the minified version on my live site?
Yes. Always serve minified CSS in production and keep the unminified version as your development copy.