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Password Strength Checker

See how strong a password really is: entropy in bits, an honest crack-time estimate and concrete suggestions. The password is analysed locally and never sent anywhere — still, test with a similar password, not your real one.

Strength
—
Entropy
—
Length
0
Crack time (offline, fast GPU)
—

    How to use

    1. Type the password you want to evaluate.
    2. Read the entropy, strength label and crack-time estimate.
    3. Follow the suggestions to make it stronger — length matters most.

    Note: Crack time assumes an offline attack at 10 billion guesses per second against a fast hash. Passwords reused from a leaked site fall instantly regardless of entropy — use a unique password per site and a password manager.

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