Is my password sent anywhere?

No. The check runs entirely in your browser using JavaScript. Your password is never uploaded, stored, or transmitted to any server.

How is the crack time estimated?

It assumes a fast offline attack at about 10 billion guesses per second, based on your password's character variety and length (its entropy). It is an estimate, not a guarantee.

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Password Strength Checker

Check how strong your password is.

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How to use the Password Strength Checker

1Type or paste a password into the input field.
2Toggle Show to reveal it and check for typos.
3Read the strength bar, crack time, and tips to improve it.

About the Password Strength Checker

Free password strength checker. Test password security with a strength meter, entropy in bits, estimated crack time, and tips. 100% local in your browser.

Part of our Security collection. Browse all tools.

Frequently asked questions

Is my password sent anywhere?: No. The check runs entirely in your browser using JavaScript. Your password is never uploaded, stored, or transmitted to any server.
How is the crack time estimated?: It assumes a fast offline attack at about 10 billion guesses per second, based on your password's character variety and length (its entropy). It is an estimate, not a guarantee.

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TOTP / 2FA Code Generator

Generate time-based 2FA codes from a secret.