Unlike some 'password safes', no information is sent to or stored on Deadbolt Password Generator's server meaning your personal information never gets transmitted.
How Does Deadbolt Work?
Deadbolt takes your PIN (e.g. '1234') and memorable pass phrase (e.g. 'online banking'), and runs through a process to generate a secure, strong password. This process is carried out on your computer, and no information is sent to or stored on the server meaning your personal information never gets transmitted.
How can it be safe if I can see the code?
The technical minded of you will be able to access this code and see exactly how it works, but this does not compromise security or make it available to hackers. The generated passwords are irreversible, and are completely meaningless without the PIN and memorable pass phrase - so as long as you keep those secret you can have any number of strong passwords.