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Password Breach Checker

Check if your password has been compromised

About Password Breach Checker

Check if your password has appeared in known data breaches using the Have I Been Pwned database — entirely in-browser with k-anonymity, so your password is never sent.

How to use Password Breach Checker

  1. 1Type or paste the password you want to check in the password field.
  2. 2Click 'Check password' — only the first 5 characters of the SHA-1 hash are sent to the API (k-anonymity).
  3. 3View the result: safe (not found in any breach) or compromised (with the number of occurrences).
  4. 4Review the detailed strength analysis: entropy, character types, unique characters, and overall rating.
  5. 5If the password is compromised, change it immediately on all services where you use it.

Tips

  • A password not found in breaches doesn't mean it's strong — always check the strength score too.
  • Use a password manager to generate and store unique passwords for every service.
  • Enable two-factor authentication (2FA) on critical accounts even with strong passwords.

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OneKitTools TeamUpdated 2.25.0