Diceware Generator — EFF Large Wordlist Passphrases
Strong passwords & passphrases — instantly, offline, free
Generate EFF Diceware passphrases — the gold standard for high-security memorable passwords. The Electronic Frontier Foundation's large wordlist was purpose-built for diceware: every word is common, unambiguous, and has no homophones. Our generator uses crypto.getRandomValues() — equivalent to rolling physical dice.
Frequently Asked Questions
What is Diceware?
A method created by Arnold Reinhold for generating passphrases by rolling physical dice and looking up words in a standardised list. Our generator uses crypto.getRandomValues() to replicate true dice entropy without physical dice.
What makes the EFF wordlist special?
The EFF large wordlist was designed to be: all common English words, all unambiguous, no homophones, no offensive words, and no confusing pairs — making passphrases easy to transcribe without errors.
How is Diceware different from Passphrase mode?
Both use word-based generation from the same wordlist. Diceware mode follows the academic EFF method exactly. Passphrase mode adds the capitalize option for service compatibility.
How many words do I need?
5 words = 64 bits entropy — rated Very Strong by NIST and equivalent to a 12-char random password. 6 words = 77 bits, suitable for the most sensitive accounts.
Is our Diceware generator truly random?
Yes. crypto.getRandomValues() produces entropy from the OS pool. It is statistically indistinguishable from physical dice rolls by any known test.