Something I built out of personal necessity.
Now that more and more people are rightfully leaving Spotify, I was searching for a simple way to prepend a url to any Spotify/Deezer/Tidal/AppleMusic link and get a universal link which allows visitors to navigate to that track/album/artist on their platform of choice.
I found song.link, but it takes >5 seconds to load, even on popular songs.
So instead, I built earworm.lol - its blazing fast (<1s, even for new links).
I also wrote a blog post about it if you want to learn more about how its built (spoiler, Cloudflare):
https://blog.jonas-klesen.de/earworm