CyberGuru Diceware
CyberGuru Diceware English Diceware passphrase generator
DICEWARE.IO

Strong passphrases
from real words.

CyberGuru Diceware generates long, memorable passphrases from English words. Every passphrase is created locally in your browser — nothing is sent to the server.

Your passphrase

Entropy
0.00 bits
Quality
Weak

Your passphrase never leaves your device. Generation happens 100% locally.

Passphrase settings

7
Estimated time to crack less than a second MD5 — 300 GH/s
Local Your passphrase never leaves your device.
Diceware A proven word-randomization method.
Secure High entropy, hard to crack.
Paweł Hordyński — CyberGuru

Entropy — what does it mean?

Entropy measures password randomness in bits. The more bits, the harder it is to guess by brute force.

EntropyRating
< 50 bitsWeak
50–70 bitsMedium
70–90 bitsGood
90+ bitsVery strong

How it works

  1. 1The browser downloads the wordlist file from the server (once).
  2. 2Randomness comes from crypto.getRandomValues().
  3. 3The selected words are joined according to your settings.
  4. 4The passphrase is never sent to the server — it stays on your device.

Security assumptions

  • Runs fully locally
  • Nothing is sent to the server
  • No history is stored
  • Cryptographically secure randomness
  • Works offline after first load