Free, open-source playlist sync for Android, Windows, macOS, Linux and Docker. Keeps playlists identical across Spotify, YouTube Music, Apple Music, Amazon Music, TIDAL, Deezer, LiveOne, Anghami, Navidrome, Jellyfin and Plex. Scheduled syncs, easy review of tracks not found. No Trackhop account or server: everything stays on your devices.

trackhop.org
github.com/xlollx/Trackhop

Name clarification:

There is also a separate website, TrackHop.app, offering Spotify and Apple Music track-link conversion. It is not affiliated with the Trackhop project documented here (xlollx/Trackhop).