Important: as of November 28th this project needs to be ran locally as Heroku which was the hosting it, has closed its free tier services.

StringSpotify

Available at: https://stringspotify.herokuapp.com/
Paste a list of song names and/or youtube music's URL and it converts into a Spotify playlist (full description below)

Full description

• Simply press in "Get started" to authorize this app to create playlists/add songs to your spotify
  
• You can either create a new playlist or add songs to an existing one
  
• Paste song name (preferably in the format of artist name - song name)
  
• One song per line
  
• The app clears automatically special characters/unnecessary words (regardless if YT link or not), example:
  https://www.youtube.com/watch?v=4k4SP01l6rY will fetch a result as: Gorillaz - Feel Good Inc. (Lyric Video) [HD] [HQ]
  the app will then convert it to Gorillaz Feel Good Inc
  Similarly song: Snail Mail "Pristi!ne" will be converted to Snail Mail Pristine
  
  
  

Issues/next steps

• In some rare cases some songs which can be found searching directly on Spotify can't be found through the API call (to be verified);
  
• Spotify's access token is valid for one hour, after this the app should get you a new one based on a refresh token, however, the documentation doesn't explain what is the validity of the refresh token, therefore, if app isn't working after a long time stopped, it may be needed to press in "Get started" one more time (to be tested/verified the expiration of refresh token);
  
• Developing a not so ugly user interface (if anyone wants to contribute, feel free);