Free Tool

Password Strength Checker

Estimate how strong a password is and roughly how long it would take an attacker to crack it. This tool runs entirely in your browser — your password never leaves your device.

Enter a password to test

Start typing to see strength

Estimated entropy

Higher is better; 60+ bits is strong.

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Time to crack (offline, fast attacker)

Assumes ~10 billion guesses/second.

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Length & character sets

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Fully offline. Nothing you type is transmitted or stored. Still, avoid testing a password you actively use on shared computers.