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Passphrase Generator.

Memorable, diceware-style passphrases from 7,776 words — cryptographically random and generated entirely in your browser.

Developed and hosted in the EU
Passphrase Generator
EFF wordlist · 7,776 words
Runs entirely in your browser

of entropy · cracking would take at 10 billion guesses per second.

5
310
Words are picked with the Web Crypto API on your device — nothing is transmitted or stored. Wordlist: EFF large wordlist (CC BY 3.0).

Why random words work

Each word is drawn from a list of 7,776 words, so a single word adds about 12.9 bits of entropy. Five words give 7,776⁵ ≈ 2.8 × 10¹⁹ combinations (~64 bits) — comparable to a fully random 10-character password. Six words (~77 bits) is the level the EFF recommends for high-value secrets. The strength comes from true randomness, not from the words looking cryptic.

The diceware method

This tool follows the diceware approach: originally you would roll five dice to pick each word from a numbered list. We use your browser's cryptographically secure random number generator instead of dice — with the EFF large wordlist, a curated list of common, easy-to-spell English words with look-alikes and profanity removed.

Where passphrases shine

  • Master password for your password manager — the one secret you must remember.
  • Computer and phone logins that you type many times a day.
  • Wi-Fi passwords that guests read from a note and type on a TV remote.
  • Disk encryption and backup keys, where strength really matters.

Need a character password instead?

For accounts that live in a password manager — where you never type the password yourself — a fully random character password in a compact field is often more practical. Our password generator creates those with the same in-browser cryptographic randomness.

Frequently asked questions

What is a passphrase?
A passphrase is a password made of several random words instead of random characters — for example gravel-lantern-mundane-orbit-frost. Because words are easy for humans to remember but there are thousands to choose from, a passphrase can be both memorable and extremely hard to crack.
How many words should my passphrase have?
Four words is a reasonable minimum, five is a strong default, and six or more is recommended for high-value secrets like your password manager's master password or disk encryption. Each word from the 7,776-word list adds about 12.9 bits of entropy.
Why random words? Can't I just pick my own?
Words you pick yourself follow predictable patterns — favorite things, common phrases, grammar. Attackers model those habits. The strength of a passphrase comes entirely from the words being chosen at random with uniform probability, which is exactly what this generator does.
Which wordlist does this generator use?
The EFF large wordlist: 7,776 carefully chosen English words (the diceware standard). The words are common enough to remember and spell, free of profanity and confusing look-alikes, and no word is a prefix of another.
Is a passphrase as strong as a random password?
Yes, at comparable entropy. A five-word passphrase (~64 bits) is roughly as strong as a 10-character fully random password, and a six-word passphrase (~77 bits) beats most 12-character passwords — while being far easier to remember and type.
Should I add numbers or capital letters?
Only if a website forces you to. The capitalize and number options exist for those password rules — they add a little entropy, but adding another word adds much more. Length in words is what counts.
Is it safe to generate a passphrase on a website?
This generator runs entirely in your browser: the wordlist is downloaded once, and the random selection happens on your device using the Web Crypto API. Nothing you generate is transmitted, stored, or logged — it even works with your internet connection turned off.
When should I use a passphrase instead of a password?
Whenever you have to remember or type the secret yourself: your password manager's master password, computer login, Wi-Fi, or encryption keys. For accounts stored in a password manager, random character passwords are just as good — see our password generator.

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