Every password manager worth its salt includes a password generator component, so you don't have to create those random passwords yourself. However, not all password generators are the same.

Do you trust the passwords created by third-party software to be truly random and safe? Here's how to build your own random generator for uncrackable passwords.

True, Excel does use a pseudo-random number generator, but you can add your own randomness by rolling a die and tapping F9 that many times before accepting the generated password.

Once you have it working, you can tweak it to make it totally your own. (Credit: Microsoft/PCMag) In cell B1, enter "Random Password Generator" or whatever title you wish for your project.

5. Use a random username generator Finally, you can also use online username generators that will automatically create a secure and unique username for you.