🎲
πŸ—οΈ

Generate Master Password for Password Managers

A diceware passphrase is ideal for your password manager master key β€” high entropy, memorable.

No login required

...

48 bits
Entropy
8 hours
Crack time @ 10B guesses/sec

Why diceware? Memorable phrases of random words have huge entropy and are easier to remember than gibberish like β€œX#9mP$qZ”. A 5-word phrase has more entropy than a 10-character random password with mixed case + symbols.
πŸ”’ All randomness comes from crypto.getRandomValues() in your browser. No words, passphrases, or any data are sent anywhere.

Master Password tips

πŸ—οΈ

Your master password must be both memorable (you can't reset it) and strong. A 6-word diceware phrase nails both β€” 60+ bits of entropy, easy to remember.

πŸ’‘

Use a memorable but non-personal phrase. Don't pick words that have meaning to you ("cat dog house" is too predictable). Trust the random generator.

πŸ”

Master passwords protect everything else. Make this 5-6 words minimum. Anything less is risky.

πŸ“‹

Practice typing it a few times before saving anywhere. Once you can type it from muscle memory, you'll never forget it.

How It Works

1
Enter
Enter your data into the tool above. Everything stays local to your browser.
2
Process
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
Download
Get your result instantly. Nothing is stored after you leave the page β€” complete privacy.

Why use ours?

βœ“Completely free β€” no hidden costs, ever
βœ“No account, email, or login required
βœ“Files never leave your device
βœ“No file size limits whatsoever
βœ“No watermarks on any output

Also check out…

Frequently Asked Questions