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Utilities

Free Password Strength Checker

Type a password you already have (or are considering) and see how strong it really is, with concrete tips to improve it.

What this does: analyzes a password you type and scores how strong or crackable it is using the zxcvbn estimation library, then lists exactly which security checks it passes or fails. No signup, no server upload: the password is checked entirely in your browser and is never transmitted.

Strength: —

  • ✕ At least 8 characters
  • ✕ Contains an uppercase letter
  • ✕ Contains a lowercase letter
  • ✕ Contains a number
  • ✕ Contains a special character
  • ✕ Not a commonly used password

Estimated time to crack: — (approximate)

This check runs entirely in your browser — your password is never sent anywhere.

Frequently asked questions

Is it safe to type my real password into this checker?

Yes. The analysis runs entirely in your browser using the zxcvbn scoring library. Your password is never sent to a server, never logged, and never stored, not even temporarily.

How is the strength score calculated?

It uses zxcvbn, a password-strength estimator that checks length, character variety, common patterns, dictionary words, and known common passwords, then estimates how long an offline attacker would need to guess it.

Is the estimated crack time accurate?

It is a reasonable approximation, not a guarantee. Real-world cracking speed depends on the attacker's hardware and the exact hashing method used to store the password, so treat the estimate as a rough guide rather than an exact figure.