Media Deduper is a free WordPress plugin designed to identify and remove duplicate images and attachments from your media library. Upon installation, it adds a "Manage Duplicates" option, allowing users to easily view and delete duplicate files. The plugin first builds an index of all media files, which may take some time initially, but it automatically updates with new uploads. For users needing faster indexing, an upgraded version, Media Deduper Pro, is available.

The plugin offers two main features: a dedicated page for managing duplicates and an automatic scan of uploaded media to prevent the introduction of new duplicates. A notable feature, "Smart Delete," ensures that a post's Featured Image is not removed even if it is identified as a duplicate, maintaining the post's appearance. However, users are advised to back up their data before using this plugin, as it can lead to permanent data loss.