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Passphrase Generator

Generate memorable Diceware-style passphrases from random words.

To generate a passphrase, choose how many words you want and a separator. Words are picked using cryptographically secure randomness in the Diceware style, producing phrases that are far easier to remember and type than random character strings of equivalent strength.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Is a passphrase really stronger than a password?

For the same memorability, yes, by a wide margin. Four random words from a 7,776-word list gives about 51 bits of entropy and is easy to remember; a "complex" eight-character password gives roughly 40 and is not.

Does adding a number to the end help?

Marginally, and it is the first thing cracking tools try. Adding a fifth word adds far more entropy than any amount of character substitution, and costs nothing in memorability.

How to use the passphrase generator

  1. 1Set the number of words.
  2. 2Set the how many.
  3. 3Choose the separator.
  4. 4Turn "Capitalise words" on or off as needed.
  5. 5Turn "Append a number" on or off as needed.
  6. 6The result appears immediately — copy or download it.

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Put the working passphrase generator on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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