Diceware Passphrase Generator

How Diceware Passphrase Generator works, step by step

1

Choose how many words you want (5-6 recommended for most uses).

2 Download it

Choose a separator character, like a hyphen or space.

Free Diceware Passphrase Generator — Random Words, Real Entropy

Diceware is a method for generating passphrases by rolling physical dice to randomly pick words from a fixed, published wordlist — originally created by Arnold Reinhold in 1995, and the same underlying idea behind the well-known "correct horse battery staple" style of password advice. This tool does the same thing digitally: it uses your browser's cryptographically secure random number generator (not a weaker predictable one) to pick each word, so the result has real, calculable entropy rather than being pattern-based like a typical human-invented passphrase.

Choose how many words you want (5 or 6 words is a strong, commonly recommended range) and the tool shows you the exact entropy in bits alongside the passphrase, so you can see precisely how strong it is rather than guessing. Because it's made of real dictionary words rather than random characters, a Diceware passphrase is genuinely easier to memorize and type accurately than an equivalent-strength string like `xQ7$mK9#vL2!`.

Key features

How to use it

1. Choose how many words you want (5-6 recommended for most uses).
2. Choose a separator character, like a hyphen or space.
3. Click Generate.
4. Copy the passphrase — regenerate any time for a new one.

Worked example

Example

6 words -> correct-horse-battery-staple-plasma-window (about 77 bits of entropy with this wordlist size) — genuinely stronger than most 12-character random-character passwords, and considerably easier to type and remember.

Who uses this tool

Tips for the best results

• 5-6 words is the generally recommended range for a strong standalone passphrase; add more words for anything protecting especially high-value data.
• Keep the separator consistent so you remember exactly how you typed it, but changing separator style doesn't meaningfully change the real strength — the word count does.
• A passphrase is only as secure as where you store it — write it down somewhere safe if needed rather than reusing it insecurely elsewhere.
• Don't reorder or edit the generated words to "make it easier" — any predictable pattern you add back in reduces the real randomness.

Common mistakes to avoid

• Assuming any 4 random words are automatically strong — entropy depends on both the word count and the size of the wordlist it's drawn from, which is why this tool shows the exact bit count.
• Reusing the same generated passphrase across multiple accounts, which defeats the purpose even if the passphrase itself is strong.
• Manually tweaking or shortening a generated passphrase to make it "easier", which can quietly reduce its real randomness.

Frequently asked questions