🔒 FREE SECURITY TOOL

Password Strength Checker

Type any password below to check its strength. We analyse entropy, crack time, character variety, and patterns — in real time. 100% private.

—Strength
—Crack Time
—Length
—Entropy
Strength Score—
—
Character Types
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Pattern Detection
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Uniqueness

🔧 How to improve this password

    How Password Strength Is Measured

    We evaluate four key factors that determine how resistant a password is to cracking.

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    Entropy (Bits)

    Each character adds log2(pool size) bits of entropy. 80+ bits considered uncrackable.

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    Crack Time

    Estimated time to brute-force at 1 trillion guesses/second.

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    Character Variety

    Using lowercase, uppercase, numbers, and symbols multiplies the search space.

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    Pattern Detection

    Common passwords, sequential chars, repeated patterns are flagged.

    How to Create a Strong Password

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    12+ Characters

    Each extra character multiplies difficulty exponentially.

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    Mix Types

    Combine upper, lower, numbers, and symbols.

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    Never Reuse

    Unique password per account — breach one, lose one.

    Need a strong password? Try our free password generator.

    Frequently Asked Questions

    A score of 80+ out of 100 is very strong. Scores below 40 indicate weak passwords crackable in seconds.
    No. The entire analysis runs in your browser. Your password never leaves your device.
    Estimated time to brute-force at 1 trillion guesses/second. Real-world attackers also use dictionary attacks.
    12 characters is the minimum. We recommend 16+ for critical accounts like email and banking.