KeyGen (ver 1.0) Abandoned Freeware KeyGen will create a file that contains randomly generated Passwords (you choose the name of the file, but it cannot exceed 8.3 characters). You can generate upercase letters, lowcase letters, numbers, and special characters, either exclusively or in combination. Password length must be 10 to 80 characters long, and you can generate 1 to 999 Passwords at once. Note that because you can restrict output to only numbers (minimum of 10, ranging from 0 to 9), KeyGen is effectively also a random number generator.