Password Strength & Breach Checker

Local · No API Cost

Real zxcvbn strength scoring + an on-demand k-anonymity breach lookup, never sending the password itself

Type a password below. Strength is scored entirely in your browser using zxcvbn — the same pattern-matching technique (dictionaries, keyboard walks, dates, repeats) real password meters use, not a naive character-class count. Nothing is sent anywhere for this part.