Npub and nprofile are both ways to represent user identities in Nostr, but they have different purposes:

npub

• This is your public key.

• It starts with npub1...

• It’s a unique identifier for your account.

• People use this to find or follow you.

• It only contains your public key, nothing else.

nprofile

• This is a more detailed version of your identity.

• It starts with nprofile1...

• It includes your public key plus extra info like which relays you use.

• This makes it easier for apps to find your data on the network.

• It’s basically a “contact card” with more context than just the public key.

In short:

• npub = just your public key (like a username).

• nprofile = public key + relay info (like a full contact).