Password Security Checker

Check if your passwords have been compromised in data breaches using the Have I Been Pwned database

Your password is checked locally and never transmitted to our servers

About Password Security

This tool uses the Have I Been Pwned API to check if your passwords have been found in known data breaches. The service contains over 10 billion compromised passwords from thousands of data breaches.

How it works:

  1. Your password is hashed using SHA-1 (client-side only)
  2. Only the first 5 characters of the hash are sent to the API
  3. The API returns matching hashes for that prefix
  4. We check if your full hash appears in the results

Privacy Note: Your actual password never leaves your device. Only a partial hash is transmitted, making this check completely private.