I am wondering if it should have a disclaimer that the data is stored publicly, i.e. the URLs you shorten can be seen by anyone and linked to your pubkey.
Introducing w3.do
A free URL shortener service enabled by the NOSTR protocol, that is fast and fuss-free.
Try it: https://w3.do/
updated:
- new domain
- improve UX and UI
special thanks:
- domain sponsor - nostr:npub137c5pd8gmhhe0njtsgwjgunc5xjr2vmzvglkgqs5sjeh972gqqxqjak37w
- designs feedback - nostr:npub149p5act9a5qm9p47elp8w8h3wpwn2d7s2xecw2ygnrxqp4wgsklq9g722q
GitHub: https://github.com/jinglescode/nostr-url-shortener

Discussion
So, about the “linked you your pub key”.. there is anonymous way and (just deployed) the “link to pubkey” way.
If you tested it just now, it’s using the anonymous method, where it’s signed by this random key that I created.