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Re:CSS-Checker: Find and Reduce Similar and Duplicated CSS S... by brianzelip on Friday March 04, 2022 @05:04AM (#30552697)
> It is designed to avoid redundant or similar css between files

See also CSS Stats, https://cssstats.com/, and atomic/functional/utility CSS libraries more generally which are designed exactly to eliminate as much redundant CSS as possible.

Re:CSS-Checker: Find and Reduce Similar and Duplicated CSS S... by zhcalvin on Saturday March 12, 2022 @12:34AM (#30649224)
Thanks for mentioning, css-checker is more lightweight and intended to be used as a command-line tool.