About the Passphrase
This passphrase generator builds memorable, diceware-style passphrases by picking words at random from a curated wordlist. You control the number of words, the separator between them, capitalization, and whether to append a number — and a live entropy estimate in bits shows exactly how strong the result is. Because each word is chosen from a known list, the strength is easy to reason about and grows predictably with every word you add.
Passphrases are ideal when you need a password you can actually remember and type, such as a master password for a password manager, a disk-encryption passphrase or an SSH key passphrase. They trade a little length for being far easier to recall than a random character string at the same strength. Everything runs locally in your browser, so the passphrase is generated on your device and never sent anywhere.
How to use it
- Choose how many words the passphrase should contain.
- Pick a separator, such as a hyphen, space or period.
- Set capitalization and optionally append a number.
- Check the live entropy estimate in bits to confirm the strength.
- Copy the passphrase or generate a new one.
Examples
- Four words with hyphens: correct-horse-battery-staple, easy to remember and type.
- Six capitalized words with a number for a high-entropy password-manager master password.
- Three words with a period separator for a quick but reasonable login passphrase.
Frequently asked questions
What is a diceware passphrase?
Diceware is a method of building passphrases by selecting random words from a wordlist. The result is long and memorable yet has well-defined, quantifiable strength.
How many words should I use?
More words means more entropy. Four to five words from a large wordlist is a common balance, and six or more is recommended for high-value secrets like a master password.
Are passphrases as secure as random passwords?
They can be. Security comes from total entropy, so a passphrase with enough words can match or exceed a shorter random password while being much easier to remember.
Does adding a number make it much stronger?
Only a little — most of the strength comes from the number of random words. A digit adds modest entropy but can help satisfy systems that require a number.
Is the passphrase generated privately?
Yes. Words are selected entirely in your browser on your device, and the passphrase is never sent to any server.
What is the difference between this and the password generator?
This tool makes word-based passphrases that are easy to memorize and type, while the password generator makes dense random-character strings. Choose passphrases when you must recall the secret yourself.