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CSS Minifier Tool

Compress and optimize your CSS code by removing unnecessary characters, whitespace, and comments to reduce file size and improve website performance.

Input CSS Code

Enter your CSS code above. Supports all CSS syntax including media queries, keyframes, and vendor prefixes.

Click to compress your CSS and reduce file size

Minified CSS Result

Optimized CSS code with reduced file size for better web performance

Minification Options

Remove commentsRemoves all comments from CSS (/* comment */)

Remove whitespaceRemoves unnecessary spaces around selectors and properties

Remove line breaksRemoves all line breaks to create a single-line CSS file

Remove last semicolonRemoves the last semicolon in each CSS rule

Remove empty rulesRemoves CSS rules that have no properties

Optimize colorsConverts colors to shorter formats (e.g., #ffffff → #fff)

Optimize zerosOptimizes zero values (e.g., 0px → 0, 0.5 → .5)

Merge duplicate rules (Beta)Combines selectors with identical properties

CSS Minification Examples

Before Minification

/* Main styles */
body {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
  background-color: #ffffff;
}

.header {
  background: #333333;
  color: white;
  padding: 20px;
}

.button {
  background-color: #007bff;
  border: none;
  padding: 10px 20px;
  color: white;
  cursor: pointer;
}

Original size: ~380 bytes

After Minification

body{margin:0;padding:0;font-family:Arial,sans-serif;background-color:#fff}.header{background:#333;color:#fff;padding:20px}. button{background-color:#007bff;border:none;padding:10px 20px;color:#fff;cursor:pointer}

Minified size: ~240 bytes (37% reduction)

Common Use Cases

🚀 Production Builds

Reduce CSS file sizes for faster website loading and better user experience

📱 Mobile Optimization

Minimize bandwidth usage for mobile users with slower connections

⚡ Performance Boost

Improve Core Web Vitals and SEO rankings with optimized CSS delivery

About CSS Minification

CSS minification is a crucial web performance optimization technique that removes unnecessary characters from CSS files without changing their functionality. This process significantly reduces file sizes, leading to faster page load times, improved user experience, and better SEO rankings.

Key Benefits & Features

Optimization Features:

Comment Removal: Strips all CSS comments (/* comment */)
Whitespace Elimination: Removes unnecessary spaces and tabs
Line Break Removal: Creates single-line CSS for maximum compression
Semicolon Optimization: Removes redundant semicolons

Performance Benefits:

Faster Loading: Reduced file sizes mean quicker downloads
Bandwidth Savings: Lower data usage, especially important for mobile
SEO Improvement: Better Core Web Vitals scores
Cost Reduction: Lower hosting and CDN costs

Best Practices & Tips

Production Only: Use minified CSS in production, keep readable versions for development
Build Process Integration: Automate minification in your build pipeline
Combine with Gzip: Use alongside server compression for maximum efficiency
Test Thoroughly: Always verify that minified CSS works correctly
Version Control: Keep both original and minified versions in your repository