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
- 1Type or paste the password you want to check in the password field.
- 2Click 'Check password' — only the first 5 characters of the SHA-1 hash are sent to the API (k-anonymity).
- 3View the result: safe (not found in any breach) or compromised (with the number of occurrences).
- 4Review the detailed strength analysis: entropy, character types, unique characters, and overall rating.
- 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.
OneKitTools TeamUpdated 2.21.4