Estimate password strength
Estimate guessability with a local dictionary/pattern model.
Input & settings
How to use this tool
Estimate guessability with a local dictionary/pattern model.
Limits and behavior
Results are generated in your browser, not uploaded to CraftAI. Inputs are size-limited and validated. Estimate guessability with a local dictionary/pattern model. Enter your own input, adjust settings, then process. Inspect and save the generated result. Reset or cancel to clear results. zxcvbn is an estimate, not a guarantee or a live breach check. Do not enter a password on an untrusted device.
Estimate whether a password is easy to guess
Use this password strength checker to identify common patterns and predictable wording. The score is an estimate, not an exhaustive attack simulation.
Does a high strength score guarantee my account is secure?
No. Reused, leaked or phishing-exposed passwords can be unsafe regardless of an estimated score. Use unique credentials and multifactor authentication.
Related tools: Password generator · Passphrase generator