It's always good to own your music, I've wanted to for along time (instead of relying on Spotify/Apple Music). You can download a list of your songs that are currently on music services using www.tunemymusic.com. Once you've got a list, copy and paste the names with arists (or just type a few manually) into the box below. Make sure each song/artist is on a new line.
When going travelling without a phone, or wanting to use a 100 hour battery life mp3 player, this the project I decided to do!
It is legal, just like other youtube converter sites.