MusicLink.

MusicLink moves your playlists between streaming services, and between accounts on the same service. It connects to each platform through OAuth so users can safely access their libraries, then transfers tracks across Spotify, YouTube, YouTube Music and JioSaavn.

I focused on speed and accuracy: asynchronous API handling plus a caching layer that remembers previously converted tracks cuts transfer times sharply. A metadata-driven matching algorithm finds the right track, with a simpler fallback when the primary match fails.