Anki add-on: Deck Deduper

Finds duplicate notes in your deck. Compares notes based on one field you choose. Keeps the first note, deletes the rest. How to use it: Tools → Clean Deck Duplicates Select your deck Select note type Select field to check Click "Check for Duplicates" Review what will be deleted Click "Clean Deck" to remove duplicates Important: Back up your collection first You can't undo after deleting Only removes exact matches