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💡 Minification typically reduces CSS file size by 20–50%. Every byte saved improves Core Web Vitals and page load speed.
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What does CSS minification do?

Minification removes whitespace, comments, and unnecessary characters from CSS without changing how it works in the browser. The result is a smaller file that loads faster.

How much smaller does minified CSS get?

Typically 20–50% smaller. CSS with lots of comments and whitespace will see bigger gains. Programmatically generated CSS with minimal formatting may see less reduction.

What is CSS beautification?

Beautification is the reverse of minification — it adds indentation, line breaks, and consistent spacing to make minified or messy CSS human-readable again.

What is auto-detect mode?

Auto-detect analyses your input CSS and automatically applies the opposite transformation: if it detects minified CSS (very few line breaks), it beautifies it; if it detects formatted CSS, it minifies it.

Does minification change how my styles work?

No. Minification only removes insignificant characters. All selectors, properties, and values are preserved exactly. Your styles will behave identically in the browser.

Is my CSS private?

Yes. All processing happens entirely in your browser using JavaScript. Your code is never uploaded to any server.