Passphrase Generator

Create a random passphrase from the EFF's list of 7,776 words. Each word is picked in your browser using your device's secure random number generator, and nothing you generate is sent anywhere.

How strong is it?

Each word chosen at random from a list of 7,776 adds about 12.9 bits of entropy. The estimate above counts only what is actually random: the words, plus the optional number. Capital letters and separators are predictable, so they add nothing, and the strength figure assumes an attacker knows exactly how the passphrase was built. As a guide, six words give about 77 bits, which is comparable to a random 12-character password of letters and digits. Seven or eight words suit a password manager's master password.

Using a passphrase well

• Do not re-roll until you get words you like; that turns a random choice into a human one.
• Use a passphrase where you must type or remember the password, such as a password manager or a disk. For everything else, a long random string from our password generator is fine.
• Never reuse it. See our guide to passphrases vs random passwords for more.

Word list: the EFF Large Wordlist for passphrases, by the Electronic Frontier Foundation, licensed under CC BY 3.0 US.