CSS Selector Deduplicator

Find and merge duplicate CSS selector rules inside stylesheets

Cleans up bloated stylesheets by merging properties belonging to identical CSS selectors.

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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.

How to use

  1. Paste the CSS code block.
  2. Click deduplicate to run the analyzer.
  3. Review cleaned stylesheet code and copy it.

FAQ

How are property conflicts resolved?
If same properties are declared twice, the value appearing last in the stylesheet takes precedence.
Does it also merge duplicate selectors inside @media blocks?
Yes, but only within the same media query — selectors are merged separately for each @media condition. A selector that appears both outside and inside a media query is left untouched, since it applies under different circumstances and merging it would change the intended behavior.
Does it also merge duplicate selectors inside @media blocks?
Yes, but only within the same media query — selectors are merged separately for each @media condition. A selector that appears both outside and inside a media query is left untouched, since it applies under different circumstances and merging it would change the intended behavior.

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