While Jellyfin is primarily a media server (like Plex or Emby), its indexing engine is 100% free and open source.
Within 30 minutes (depending on file count), type "Batman" into the search bar. Your index will instantly show every Batman MKV you own, regardless of whether it was in a subfolder named "DC" or "Superheroes." mkv index free
Where to Find Free MKV Index Files (And How to Use Them) While Jellyfin is primarily a media server (like