What is CSS minification?

CSS minification removes whitespace, comments, and unnecessary characters from CSS code to reduce file size and improve page load speed.

Does minification change my CSS behavior?

No. Minification only removes formatting — it doesn't change how your CSS works. The minified version produces identical visual results.

How much file size can I save?

Typically 20-40% reduction depending on the original formatting. Heavily commented files may see even greater savings.

CSS圧縮器 / 整形器

本番用にCSSを圧縮、または可読性のために整形。

Input CSS

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About CSS Minification

CSS minification removes unnecessary characters like whitespace, comments, and semicolons to reduce file size. Smaller CSS files load faster, improving website performance and user experience. Use beautify mode to make minified CSS readable again.

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How to Use

Paste your CSS code in the input field
Click 'Minify' to remove whitespace and comments
Or click 'Beautify' to format compressed CSS for readability
Copy the result for your project

Common Use Cases

Optimizing CSS for production deployment
Reducing page load times
Beautifying minified CSS for debugging
Preparing stylesheets for CDN delivery

CSS圧縮器 / 整形器

About CSS Minification

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How to Use

Common Use Cases

Frequently Asked Questions