[new_user_final]

https://temp.pw/?item=82282c4798d60cb4#key=idh36ud

I think something like this could work.

The server store encrypted password identified by item id. Browser side decrypt the encrypted password using key in the hash part. The hash part does not reach the server.

[zamadatix]

The full URL gets sent to the server on connection. You could break this out from the link, at which point you're back to sharing a password to share a password.

[KomoD]

"#key=idh36ud" doesn't get sent to the server.

only "https://temp.pw/?item=82282c4798d60cb4"

https://developer.mozilla.org/en-US/docs/Web/URI/Reference/F...