Downloadify was a website I used to download YouTube videos / playlists (with the option to download only audio) & Spotify songs / albums / playlists.

It was initially built as a web-app using plain vue (plain css, no tailwind) and an express.js server running on my personal vps via pm2.
The backend would download the resource request by the user on the vps and then stream it to the frontend.

I then made a desktop app in Java Swing as a school assignment, that was fun.