Password Strength

Estimate a password's strength from its length and character variety — entropy in bits and a rough offline crack time. It runs entirely on your device and stores nothing.

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💡 Good to know: Length beats symbols: a long string of random words is both stronger and easier to remember than a short "P@ssw0rd!".

Worked example

Strength: strong · Entropy: 78.838267 bits · Crack time: centuries+

Learn the method

Inputs

Password
Tr0ub4dour&3

Frequently asked

How is crack time estimated?

Assuming ten billion guesses per second against the character pool your password uses.

Is my password sent anywhere?

Never. The estimate is computed locally.