Switching streaming services should not mean rebuilding ten years of playlists by hand. SongMirror keeps your playlists mirrored across Spotify, Apple Music, YouTube Music, Amazon Music, Deezer, TIDAL, and Qobuz, so the collection you curate in one place exists everywhere. Choose one-way copies, merge several sources into a single destination, declare an authoritative group that wins disagreements, or turn on full bidirectional sync where every service converges on the same tracks. Matching leans on ISRC codes first, so the song that lands is the same recording you started with, not a karaoke tribute with a similar title. One-off transfers handle migrations in a single pass, while scheduled syncs keep everything current in your original date-added order without you thinking about it again. A local mirror can download audio into a Jellyfin-ready library for the playlists you want physically on disk. Playlist metadata backups guard against a service deleting something you love, credential renewal keeps connected accounts working, and safety rails stop a bad run from wrecking a good library. The whole thing also runs headless from the command line with the same sync engine, and the interface speaks fifteen languages including a right-to-left Arabic layout. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.