Why use a passphrase?
A passphrase is several random words joined together, like Harbor-Velvet-Cobalt-Tiger-7. Because it is long, it is very hard to brute-force, yet the words make it far easier to remember than a random string of symbols. This “diceware” approach is widely recommended for master passwords you must memorize.
Example
Four random words from a large list already provide strong security; adding a fifth word, capitalization and a number increases it further. The tool shows an entropy estimate so you can see how strong your choice is.
Tips
- Use at least 4 words for everyday accounts and 5–6 for a password-manager master password.
- Never reuse the same passphrase across sites.
- Store unique passwords in a password manager and reserve a memorable passphrase for unlocking it.
- Turn on two-factor authentication wherever possible.
Limitations
- The built-in word list is sized for convenience, not the full diceware list; for maximum entropy use more words.
- A passphrase is only secure if the words are chosen randomly — don’t swap in meaningful personal words.
Privacy: Passphrases are generated with secure randomness entirely in your browser.