I think the best way right now is to use njump. It’s basically a link that brings visitors to a landing page and allows them to view your #Nostr profile from their client of choice.

Here’s mine as an example:

https://njump.me/npub15ypxpg429uyjmp0zczuza902chuvvr4pn35wfzv8rx6cej4z8clq6jmpcx