Downloadify is a website that can be used to download YouTube videos / playlists (with the option to download only audio) & Spotify songs / albums / playlists.
It also has a desktop app, that I made as a school assignment in java Swing ^^.
The backend instead has been made with express.js.

This doesn't work as I'm not using it anymore.

• Implement Redis for caching purposes
• Permit users to input more links at once and download them all together
• Make Spotify and YouTube downloads client-side
• Use socket.io instead of submitting an http request every 3 seconds to check the status of the download