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CSS Minifier / Beautifier

Minify or beautify CSS code for production or readability. Remove comments, whitespace, and unnecessary characters with size comparison.

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Free Online CSS Minifier

CSS minification removes unnecessary characters like whitespace, comments, and trailing semicolons to reduce file size. Smaller CSS files load faster, improving website performance and user experience. This tool also offers beautify mode to make minified CSS readable again. All processing happens locally in your browser.

How to Minify CSS

  1. Paste your CSS code into the input field
  2. Click Minify to remove whitespace, comments, and unnecessary characters
  3. Review the size comparison showing original vs minified size
  4. Copy the minified CSS for production use

Frequently Asked Questions

What is CSS minification?
CSS minification is the process of removing unnecessary characters from CSS code without changing its functionality. This includes removing whitespace, line breaks, comments, and redundant semicolons. The result is a smaller file that loads faster in web browsers.
Does minification change how my CSS works?
No. CSS minification only removes formatting characters that browsers ignore. The minified CSS produces identical visual results. All selectors, properties, and values remain unchanged.
How much file size can I save?
Typically 20-40% reduction depending on the original formatting and amount of comments. Heavily commented files with verbose formatting may see even greater savings, sometimes up to 60%.
What does the beautifier do?
The beautifier does the opposite of minification. It adds proper indentation, line breaks, and spacing to compressed CSS, making it human-readable for debugging and development. This is useful when working with minified third-party CSS.
Is my CSS data safe?
Yes. All CSS processing happens entirely in your browser using JavaScript. No data is sent to any server. Your CSS code remains completely private.

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