CSS Minifier

Compress and optimize CSS stylesheets for production deployment. Advanced minification removes unnecessary whitespace, comments, and redundancy while preserving styling functionality.

Quick Presets

Input CSS

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Minified CSS

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CSS Minification Guide & Best Practices

What This Tool Delivers

The CSS Minifier optimizes stylesheets for production by removing unnecessary whitespace, comments, and redundancy while preserving styling functionality. Essential for web performance optimization and reducing bandwidth usage.

Advanced optimization techniques including color shortening, value optimization, duplicate rule merging, and property sorting. Perfect for build pipelines, CDN deployment, and performance-critical web applications requiring maximum load speed.

Removes whitespace, comments, and unnecessary characters
Shortens color values (#ffffff → #fff)
Optimizes units and values (0px → 0)
Merges duplicate selectors and rules
Converts to shorthand properties when possible
Reduces file size by 40-80% typically

CSS Optimization Best Practices

Maintain Source Files: Always preserve original CSS files for development and debugging. Use version control to track minified assets separately from source stylesheets.

Test Thoroughly: Validate visual appearance after minification as optimization can sometimes affect complex selectors, pseudo-elements, or browser-specific prefixes.

Automate Process: Integrate CSS minification into build tools like Webpack, Gulp, or PostCSS. This ensures consistent optimization and prevents manual errors in production deployments.

Combine Optimization: Use CSS minification alongside gzip/Brotli compression and critical CSS extraction for maximum performance gains and optimal user experience.

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