Gezidao

Password Strength Checker

See how strong a password is and how long it takes to crack.

0Entropy
—Time to crack

Requirements

  • At least 12 characters
  • Upper and lower case
  • Contains a number
  • Contains a symbol

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AHow to use

  1. 01 Type or paste a password (use Show to reveal it).
  2. 02 See the entropy score, estimated crack time and requirement checklist.
  3. 03 Adjust until every check passes and the crack time is years.

QFAQ

How is crack time estimated? ＋

It assumes a fast offline attacker trying 10 billion guesses per second against a hashed database — the realistic worst case for stolen password files.

Is my password transmitted anywhere? ＋

Never. The analysis runs in JavaScript on your device; the password is not sent or stored.

→Related tools

→ Passphrase Generator Generate memorable secure passphrases. → Password Generator Create strong random passwords with adjustable length and character sets. → Random Number Generator Cryptographically strong random numbers in any range. → Coin Flip Flip one or many coins and see heads/tails statistics.