Why are passphrases better than passwords?

Longer inputs have more entropy. 'correct-horse-battery-staple' is harder to brute-force than 'P@ssw0rd!' even though the latter looks complex.

How many possible passphrases are there?

With a 150-word list and 4 words the space is 150^4 ≈ 506 million combinations, giving about 29 bits of entropy.

Can I use these as my real passwords?

Yes — these passphrases are generated entirely in your browser and never sent to any server.

Passphrase Generator

Generate a random passphrase made of common English words. Long but memorable — ideal for master passwords. Free, no signup.

Embed this tool on your site

<iframe src="https://abracalc.com/generator/passphrase-generator/embed.html" width="340" height="320" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Choose the number of words (4 is a good default).
Pick a separator character between words.
Toggle capitalisation for the first letter of each word.
Click Calculate to generate; click again to get a fresh passphrase.

Passphrases combine multiple random common words, trading complexity for memorability. A 4-word passphrase is both stronger than most passwords and far easier to remember.

Frequently asked questions

Why are passphrases better than passwords?: Longer inputs have more entropy. 'correct-horse-battery-staple' is harder to brute-force than 'P@ssw0rd!' even though the latter looks complex.
How many possible passphrases are there?: With a 150-word list and 4 words the space is 150^4 ≈ 506 million combinations, giving about 29 bits of entropy.
Can I use these as my real passwords?: Yes — these passphrases are generated entirely in your browser and never sent to any server.