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CSS Minifier

Minify CSS code to reduce file size. Remove comments, whitespace, and optimize selectors for production-ready stylesheets.

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Original:752 bytes
Minified:473 bytes
Saved:37.1%
Input CSS
Minified Output
.container{max-width:1200px;margin:0 auto;padding:20px}.header{background-color:#333;color:white;padding:1rem 2rem}.header .logo{font-size:24px;font-weight:bold}.nav{display:flex;gap:1rem}.nav a{color:inherit;text-decoration:none;transition:opacity .2s ease}.nav a:hover{opacity:.8}.btn{display:inline-block;padding:10px 20px;border:none;border-radius:4px;cursor:pointer}.btn-primary{background-color:#007bff;color:white}.btn-secondary{background-color:#6c757d;color:white}

What is CSS Minifier?

CSS Minifier is a free online tool that compresses CSS stylesheets by removing whitespace, comments, and unnecessary characters. Smaller CSS files improve page load times and overall website performance. All processing happens in your browser for complete privacy.

Common Use Cases

Production Stylesheets

Minify CSS before deploying to reduce page load times.

Email Templates

Compress inline CSS for HTML email templates with size constraints.

Third-Party CSS

Minify vendor CSS files that are not already optimized.

Quick Optimization

Fast minification without configuring build tools like webpack or gulp.

How to Use This Tool

  1. Paste your CSS code into the input area
  2. Enable or disable comment removal and whitespace compression
  3. View the minified output with size savings
  4. Copy or download the compressed CSS file

Frequently Asked Questions

Will minification break my styles?
No. CSS minification only removes whitespace and comments. All style rules remain intact and functional.
What about CSS custom properties?
CSS custom properties (variables) are fully preserved. Only unnecessary whitespace is removed.
Should I minify CSS source maps?
Source maps should be kept for debugging but not served to end users in production.
How does this compare to build tools?
This tool provides quick, manual minification. For automated builds, use tools like cssnano in your pipeline.

CSS Minifier is a free online tool that requires no signup or installation. It works directly in your browser, keeping your data private and secure.