Two secrets, not one
Your vault key comes from your master password and a random Secret Key that stays on your devices and in your Emergency Kit. A stolen vault file is useless without both.
Your passwords, locked on your Mac.
KeyPug is a password manager for Mac with a Chrome extension. Your vault is encrypted on your device with your master password plus a 128-bit Secret Key, so nothing in it is readable by anyone else. Not even us.
No account, no server
There is nothing to sign up for. Your vault is an encrypted file on your Mac. KeyPug has no servers that hold your data.
Fills in Chrome
The extension fills logins when you ask it to and offers to save new ones. It talks only to the KeyPug app on the same Mac, over an encrypted, paired channel.
Watchtower
Find weak and reused passwords on your Mac, and check for breached ones without sending your passwords anywhere.