That’s true. But they do give you easy, portable, site specific passwords. No apps or database syncing required.

If you just want to log in to Lemmy on a work computer at lunch it seems a good option to me.

There’s a few. LessPass is one that has been going a few years.

The best way I find to think about it is a padlocked box.

The public key is a box with an open padlock on it. I can give it to anyone. If someone puts a message inside the box they can lock the padlock, but they don’t have the key to open it again.

I keep the key private. If someone sends me a locked box that has my padlock on it, only I have the key to open it and read the message.