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Generate Master Password for Password Managers

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

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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 “X#9mP$qZ”. A 5-word phrase has more entropy than a 10-character random password with mixed case + symbols.
🔒 All randomness comes from crypto.getRandomValues() in your browser. No words, passphrases, or any data are sent anywhere.

Master Password tips

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

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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.

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

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

사용 방법

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

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