Bazarr is a companion application for Sonarr and Radarr that automates subtitle management for movies and TV series in your media library. It searches for, downloads, and maintains subtitles according to per-show and per-movie preferences.

Key Features

Integrates with Sonarr and Radarr to track indexed series, episodes, and movies
Automatic search and download of missing subtitles as they become available
Manual subtitle search with selection and proper file naming for media players
Subtitle upgrades: periodically replaces existing subtitles when better matches are found
Scans existing libraries for internal and external subtitles and fetches missing ones
Download history tracking (provider, time, and what was fetched)
Supports forced/foreign subtitles (provider-dependent) and a large set of languages
Supports many subtitle providers, including OpenSubtitles and others

Use Cases

Keep TV shows and movies fully subtitled in preferred languages without manual downloads
Maintain consistent subtitle naming/placement for Plex/Jellyfin/Kodi-style playback
Periodically improve subtitle quality by upgrading previously downloaded subtitles

Limitations and Considerations

Does not discover media on disk by itself; it only manages items already indexed in Sonarr and Radarr
Provider availability and matching quality can vary depending on the subtitle source

Bazarr is well-suited for media automation stacks that rely on Sonarr and Radarr and want reliable, hands-off subtitle acquisition and upkeep. It combines automation with manual controls to handle edge cases when matching is difficult.