CSS minifier

Minify CSS online instantly with this CSS minifier tool. Remove spaces, line breaks, comments, and redundant characters to create smaller, faster-loading stylesheets. Common long-tail use cases include minify CSS code online, compress CSS for faster websites, and reduce CSS file size for SEO performance.

What is CSS Minification?

CSS minification is the process of compressing Cascading Style Sheets by eliminating unnecessary characters without affecting how browsers render styles. This includes whitespace, comments, semicolons, and redundant syntax. The result is lightweight CSS that improves website loading speed and efficiency.

Why use a CSS Minifier?

• Faster performance: Smaller CSS files reduce page load times and improve Core Web Vitals.
• SEO benefits: Search engines reward optimized sites with better rankings.
• Reduced bandwidth: Minified styles consume fewer server resources.
• Professional deployment: Production-ready CSS without unnecessary clutter.

How to use the CSS Minifier

1. Paste your CSS code or upload a stylesheet file.
2. Click “Minify” to compress the code automatically.
3. Copy or download the optimized CSS for your website.

Who should use it?

• Front-end developers preparing optimized assets for production.
• SEO specialists aiming to improve page performance scores.
• Agencies & businesses delivering fast-loading websites to clients.
• Students & learners exploring best practices in performance optimization.

Best practices for CSS minification

• Use in production: Always minify CSS before deploying a live website.
• Keep an original copy: Maintain a formatted version of CSS for editing and updates.
• Combine with HTML & JS minification: For maximum performance, compress all front-end resources.
• Check browser rendering: Test after minification to ensure styles remain unchanged.

Examples

Before Minification

body {
  font-size: 16px;
  color: #333;
  margin: 0;
  padding: 0;
  /* This is a comment */
}

After Minification

body{font-size:16px;color:#333;margin:0;padding:0}

FAQ

Does minification affect how my site looks?

No—the minified CSS produces the same visual results. Only unnecessary characters are removed.

Is it possible to unminify CSS?

Yes—you can use a CSS beautifier or formatter to restore the code to a readable format, though comments and formatting won’t be fully recovered.

Can I minify CSS with media queries and animations?

Yes—the CSS minifier preserves functionality, including media queries, keyframes, and advanced selectors.