Amber and nos2x do this perfectly, but neither alby nor nsec.app seem to support ncryptsec

Based on your criteria, a HTML based tool with verifiably locally run only code on a non-networked computer... The same way that you have tools that can do BIP-39 calculations, etc. That doesn't mean that this option would be safe just that it would be safer. And the complexity of it against the average non-technical mind is going to make foot guns a plenty. I don't see a good way to be honest.

amber supports nsec-encrypted at least i used to switch from nos2x to amber I used pingkey

PingKey

PingKey

PingKey — Not a chat. Just a worry-free way to let people reach you.

with bitwarden

I think "non-networked computer" rules out the regular user.

Gossip and Amethyst also support it. But I think Gossip requires a huge PoW to trust the key.

Bingo. I mean, if you haven't cut out or short-circuited the radio, then how do you know? Lol. Footguns, footguns everywhere.

Nak