Such a thing is typically called a deterministic password manager. One problem with it is that you can't change the algorithm. If you want to change your PBKDF2

Such a thing is typically called a deterministic password manager. One problem with it is that you can't change the algorithm. If you want to change your PBKDF2 from 1000 to 5000 iterations, then you can't login anymore on any of the services where you used this tool to set the password. See also this https://news.ycombinator.com/item?id=13016132 https://news.ycombinator.com/item?id=13016132