Password Strength Checker

Instantly test how strong your password is. Get a detailed analysis of entropy, crack time, and weaknesses — all computed in your browser, never sent anywhere.

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Length
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Entropy (bits)
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Est. crack time
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Score (0–4)

Character Composition

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Lowercase
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Uppercase
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Digits
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Symbols
  lower     upper     digit     symbol

Feedback & Suggestions

    Tips for a Strong Password

    • Use at least 12 characters — longer is always stronger.
    • Mix uppercase, lowercase, numbers, and symbols.
    • Avoid dictionary words, names, dates, and keyboard patterns (qwerty, 12345).
    • Use a unique password for every account.
    • Consider a passphrase: four random words (e.g. correct-horse-battery-staple).
    • Use a password manager to generate and store strong passwords.