Diceware Passphrase Generator

Why passphrases beat random passwords

A 4-word Diceware passphrase from the EFF list (1296 words) has ~51 bits of entropy — equivalent to a random 8-character mixed-case alphanumeric, but far easier to type and remember.

Each word added contributes another 12.9 bits:

Where to use which

• Password manager master password — 7-8 words. You'll type this often, so make it memorable.
• Full-disk encryption — 8-10 words. High value, typed rarely.
• SSH key passphrase — 6-7 words. Balanced.
• Random web accounts — let your password manager generate random characters instead.

Wordlist source

This tool uses the EFF short wordlist — 1296 words, 4-9 letters each, no homophones, designed for memorability. Public domain.

Privacy

The wordlist is bundled with the page and random bytes come from crypto.getRandomValues(). Nothing is sent to a server.