George found a website called howsecureismypassword.net to determine how secure his login is. It'll tell you how long it would take a computer to crack your password with a brute force attack. Leo says that the longer the password is, the better. It's interesting, but giving a password to a random site will make it far easier to crack since it's no longer private. So while it may be interesting to try, don't use that password after.
HaveIBeenPwned.com is a better option. They make sure the password isn't passed on to the site owners.