Passphrase Generator
Random words are easier to remember and just as strong. Generated locally from a 2,048-word list - 11 bits of entropy per word.
From Diceware to This Page
The word-list method has real history. In 1995, Arnold Reinhold published Diceware: roll five physical dice, look up the number in a list of 7,776 words, repeat. Physical dice meant provable randomness in an era when computers couldn't be trusted for it. The EFF modernized the lists in 2016, dropping obscure words and awkward homophones.
This generator applies the same math with your browser's CSPRNG standing in for the dice, drawing from 2,048 curated words - A power of two, so each word contributes exactly 11 bits (2¹¹ = 2,048) with no rounding loss.
How to actually memorize one: turn the words into a scene. For a phrase shaped like river-lantern-oak-thimble-march, picture marching past an oak holding a lantern over a river, wearing a thimble. Absurd images stick - That's the method competitive memorizers use. Type it three times and it's usually yours for good.
Why Passphrases Work
The passphrase entropy math
Each word is drawn uniformly at random from a 2,048-word list, so every word adds exactly 11 bits of entropy. Five words give 55 bits; six words give 66 bits - stronger than an 8-character random password and vastly easier to type on a phone.
The strength comes from true randomness, not word choice. A quote from your favorite book has almost no entropy, because attackers try famous phrases first. Full details in our guide: what is a passphrase?
When to use a passphrase
- Master passwords - For a password manager like our Password Wallet.
- Computer logins - Anything you type many times a day.
- WiFi networks - Or use the dedicated WiFi password generator.
- Spoken sharing - Words survive being read over a phone call.
For accounts a manager autofills, a fully random password is still the best choice. Test either kind in the strength checker.
Want the raw material? Free to reuse for your own Diceware rolls or projects.
How to Use the Passphrase Generator
Pick a word count
Five words is the sweet spot for most uses; six or more for a password manager master passphrase.
Choose a separator
Dashes are easiest to type on phones; spaces read naturally; 'none' makes a compact string.
Generate and copy
Each word is drawn with a cryptographically secure RNG from 2,048 words - Regenerate until one sticks in your memory.
Store or memorize it
Save it to the Password Wallet, or say it aloud three times - Word-images are far stickier than random characters.
Words vs. entropy vs. crack resistance (2,048-word list, 11 bits/word)
| Words | Entropy | Guesses needed | Offline GPU attack (100B/s) |
|---|---|---|---|
| 3 | 33 bits | 8.6 billion | under a minute |
| 4 | 44 bits | 17.6 trillion | ~1.5 days |
| 5 | 55 bits | 36 quadrillion | ~11 years |
| 6 | 66 bits | 73 quintillion | ~23,000 years |
| 7 | 77 bits | 1.5 × 10²³ | ~48 million years |
| 8 | 88 bits | 3.1 × 10²⁶ | ~98 billion years |
Passphrase Generator - FAQ
How many words should my passphrase have?
Can I just pick the words myself?
Do the capitalization and number options make it stronger?
Is correct-horse-battery-staple itself a good passphrase?
More questions about passwords and security? Browse the security guides.
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