Master Password App

Strong passwords can be hard to remember, especially when you have a lot of different ones. But the best security practices say you should do exactly that! Master password makes that easy: all you need to do is remember your name and one master password, and Master Password will take care of the rest. On this page, I'll tell you a little more about Master Password and then walk you through creating a strong and memorable master password to use with the app.

Master Password is different from other password managers

Most password managers store passwords that you come up with, or randomly generated ones, so you don't have to remember them. Master password doesn't store anything; it generates your passwords with an algorithm (called a hashing function). That means you can download Master Password on any device, and as long as you enter the correct master password, it'll give you the same passwords -- without sending your passwords to anybody else's computer ("the cloud"). It also means if your computer crashes, you don't lose any of your saved passwords. It also means that you'll never be stuck away from your computer without knowing a password to one of your sites; just find the nearest phone or computer, download the app, enter your master password, and you're good to go.

How do I use Master Password?

On any machine,

  1. Download the app
  2. Enter your name and master password
  3. Enter the name of the site you want your password for.
  4. Your password apears. Copy it to where you need it.

That easy?! What's the catch?

All your passwords are tied directly to your master, and there's no way to change or recover a master. So...

  1. If you forget your master password, you lose all your passwords.
  2. If someone gets access to your master password, they get access to all your passwords. This is both bad and a pain to change all your passwords.

How secure is Master Password?

In theory, masterpasswordapp isn't quite as secure as a solution with truly random passwords locked in a vault by both a password and physical key. But that kind of a solution is a pain to use, and security that you don't use is no security at all. Masterpasswordapp makes your life easier, which means you'll use it, which means it's the most secure solution of all.

Create a strong and memorable master password with Diceware

xkcd password strength comic

You'll create a correct-horse-style password (passphrase) using a method called Diceware. It should be 6 or 7 words long. How strong is that? Assuming the person trying to hack you KNOWS you're using Diceware...


How to use Diceware

Open this link. There's the list of words you will use. There are word lists for other languages too, if you'd prefer one of those.


die rolls: 44362 25645 65164 56411 55555 14233

master passphrase is: "outdo fluff zoe tear sum bit"