/diceware

Diceware

Generate memorable high-entropy passphrases from a 1,296-word list. Roll real dice if you don't trust a browser RNG.

Words Separator Capitalise Trailing digit

press roll

How it works

What this is: A diceware passphrase is a sequence of random words drawn from a wordlist, originally designed to be rolled with five physical dice. Four to six words give you a phrase strong enough to resist offline cracking — and, crucially, one you can actually remember.
How it works: We use a 1,296-word short-wordlist (inspired by the EFF's 2016 list: 1–7 letters, no ambiguous pairs). Words are selected with crypto.getRandomValues, which draws from the OS entropy pool. Entropy per word: log2(1296) ≈ 10.34 bits. Six words ≈ 62 bits.
Worked example: 6 words, dash: correct-horse-battery-staple-ruby-tin capitalise: Correct-Horse-Battery-Staple-Ruby-Tin + digit: Correct-Horse-Battery-Staple-Ruby-Tin7
Privacy: Runs entirely in your browser. No network requests. Nothing you paste or type leaves this tab.