I know this has been asked before as like 2013, but that is some time ago and doesn't apply anymore.
Spotify suggests four external sites to convert iTunes playlists to Spotify, but none of them is working.
How can I import a 3000+ songs iTunes playlist to Spotify (latest iTunes version for Mac)?
Solved! Go to Solution.
I took these steps:
1. Go to iTunes -> Select playlist -> Go to Archive -> Library -> Export Playlist -> Export in .m3u file
2. Go to http://soundiiz.com/#/converter -> Login the Spotify box with your spotify account -> When login succesfull, drag and drop the m3u file in the pink apple box. Then wait for a while and the playlist will automatically be in your spotify account.