CSS Minifier
Compress your CSS styles by stripping out comments, white space, and formatting.
Original CSS
Minified Output
What is a CSS Minifier?
A CSS Minifier strips all unnecessary whitespace, line breaks, and comments from your CSS stylesheets, producing a compact file that browsers interpret identically to the original.
Why Use This Tool?
CSS files are render-blocking resources — minifying them is one of the easiest PageSpeed wins. Pair with the HTML Minifier for a complete performance optimisation pass.
Best Use Cases
- Optimising stylesheets before production deployment
- Reducing render-blocking resources for Core Web Vitals
- Minimising CSS in email templates
- Custom build workflows without a bundler
How to Use This Tool
Paste your CSS stylesheet into the input panel and click Minify CSS. Copy the minified output and replace your original stylesheet file.
FAQs
Is this tool free?
Yes, completely free with no login required.
Does this tool store my CSS code?
No. All minification happens in your browser — your code never leaves your device.
Will minification break my styles?
No. Only whitespace and comments are removed. All selectors, properties, and values are preserved exactly as written.