You can test password strength here https://howsecureismypassword.net/
This really isn't relevant as password managers already have this sort of thing built in. Not to mention it isn't getting round the user having to create and remember/record said passwords, what the OP is actually trying to get round.
@ ullop1
I have just been reading an article in a computer mag about this and LastPass is highly recommended. Two things were railed, 1. that the encrypted passwords are stored on-line and 2. there is a Free and a Paid version, so it depends on exactly what you require, if it is all in the free version.
Another one is KeePass, very close in name and is completely free - the encrypted passwords are stored locally or you can save it to a USB.