[onionjake]

I wrote my own hashing method [1] that given a correct spec for password restrictions would always generate a valid password. It does it by taking the hash in base64, then translating those a new set of base64 characters chosen to increase the likelihood of getting a valid password. If one generated is not valid, it then iterates until a valid one is found (by cycling the bits).

I have used this personally since I wrote it. Given the downsides, I agree that password managers are probably better for most people.

[1]: https://github.com/onionjake/doh