Diceware Passphrase Generator
Memorable word-based passphrases, diceware style.
Free · no sign-up · runs locally·
About this tool
A passphrase of random common words is easier to remember and type than symbol soup, and its security is honest arithmetic: each word drawn uniformly from an N-word list adds log₂(N) bits. This tool's curated 642-word list gives 9.33 bits per word: 8 words reach about 75 bits and 9 words about 84 bits — on par with a random 12- to 13-character password — while staying easy to type.
Words are drawn with your browser's CSPRNG. Add separators, digits, or capitalization to satisfy legacy password rules.
Like everything on encrypt.tools, this runs entirely in your browser — nothing you enter is transmitted or stored.
Frequently asked questions about Passphrase Generator
Are word passphrases secure?+
Yes, when the words are chosen randomly. Each word from this 642-word list adds 9.33 bits of entropy, so 8 words give about 75 bits and 9 words about 84 bits — comparable to a random 12–13 character password, but far easier to type and remember.
What is diceware?+
A method of building passphrases by selecting random words from a fixed list — originally with physical dice. This tool uses your browser's secure random generator instead.
How many words do I need?+
With this list, use at least 8 words (about 75 bits) for a password-manager master password or disk encryption, and 9 or more for high-value secrets. The classic 7,776-word Diceware list needs 6 words for similar strength. The tool shows the exact entropy for every phrase.