Question 1

What does a CSS minifier do?

Accepted Answer

A CSS minifier removes all unnecessary characters from CSS code — including whitespace, newlines, comments, and redundant semicolons — without changing the functionality. This reduces file size and improves page load speed.

Question 2

How much can CSS minification reduce file size?

Accepted Answer

Minification typically reduces CSS file size by 20-40%. Combined with gzip compression, which works even better on minified files, you can achieve 70-80% size reductions compared to uncompressed original files.

Question 3

Will minified CSS still work correctly in all browsers?

Accepted Answer

Yes. CSS minification only removes non-functional characters (whitespace, comments). The resulting CSS is semantically identical to the original and works correctly in all browsers that supported the original.

Question 4

Can I reverse or unminify CSS?

Accepted Answer

Yes. CSS minification is reversible using a CSS formatter or beautifier tool. The functionality is preserved, though original comments and exact formatting cannot be recovered as they are discarded during minification.

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