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Password Strength Checker

Test password strength with entropy, crack-time estimates, and concrete fixes.

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Entropy

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Time to crack

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    What Is Password Strength Checker?

    The Password Strength Checker scores any password with real entropy math, an honest crack-time estimate at ten billion guesses per second, and concrete fixes for what is weak. Everything runs in your browser - the password is never sent, stored, or logged anywhere.

    Who Uses the Password Strength Checker?

    Anyone creating accounts, IT teams setting password policy, and security trainers use it to turn vague advice into a number.

    How to Use the Password Strength Checker

    1. Type the password into the box (it stays on your device).
    2. Read the strength label, entropy bits, and crack time.
    3. Apply the listed fixes until the bar turns green.

    Why Choose Our Password Strength Checker?

    • True entropy and crack-time math, not vibes
    • Specific fixes: length, variety, and pattern removal
    • 100% client-side - safe for real passwords

    Try the Password Strength Checker above — it is free, fast, and works on any device. Bookmark this page to return whenever you need it.