You can use https://www.tunemymusic.com as nostr:npub1eequz6v23szzyx9utphsh8kg6kll50wte6sfh4vah8gdjtplcz6qg7at9s said, or there is SongShift on iOS (heard you’re a big fan)
https://apps.apple.com/gb/app/songshift/id1097974566

I know on SongShift at least you can export as json. I can see our future music playlists being stored on Nostr - you could access it through any client of your choice (Tidal, Spotify, Apple Music)