Password Breach Checker
Check if your password appeared in a data breach using k-anonymity — 100% private and free.
About Password Breach Checker
Our Password Breach Checker uses the HaveIBeenPwned API with k-anonymity to safely check if your password has appeared in any known data breach — without ever sending your actual password.
If your password has been found in a breach, change it immediately on all accounts where you use it, and enable 2FA for extra protection.
How to Use
Enter your password in the input field above.
Click Check Password to analyze it against the breach database.
If your password was found, see how many times it appeared in breaches.
If found, change that password immediately on all accounts.
Consider using our Password Generator to create a stronger replacement.
Privacy & Security
Your password never leaves your browser. We hash it locally using SHA-1, then send only the first 5 characters of the hash to HaveIBeenPwned API. The server returns all matching hashes and we check locally. Your actual password is never exposed.
Frequently Asked Questions (FAQ)
Protect Your Accounts from Breaches
Check your passwords, generate stronger ones, and enable 2FA to stay secure online.
Generate Strong Password →