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Check Password Strength Online

Type a password and get an instant strength rating, entropy estimate and rough crack-time calculation. Your password is never sent anywhere — the analysis runs entirely in your browser.

Runs in your browser — your text is never uploaded or stored.

Password

Strength report

Strength: Strong
Entropy: 72 bits
Estimated crack time: 7 millenniums
Suggestions:
- Use at least 12–16 characters; length beats complexity.

How to Use

1.Type the password you want to evaluate.
2.Read the strength label, entropy and crack time.
3.Review the suggestions to make it stronger.

FAQ

Is my password uploaded?

Everything runs locally in your browser with JavaScript — nothing is uploaded, logged or stored. The password never leaves your device.

What is entropy?

Entropy measures how unpredictable a password is. Higher entropy means more possible combinations an attacker must try.

Need more options?

Password Strength Checker

Check password strength offline. Get entropy in bits, an estimated offline crack time and concrete improvement tips — your password never leaves the browser.