Password Exposure Checker

Check whether a password has appeared in known breach data. Your password stays in this browser while the check is performed.

Password to check

Enter the password only when you are ready to check it. We clear this field after each check. Do not use this tool for a password you cannot safely enter on this device.

Why check a password?

A password exposed in a breach can put every account that uses it at risk. Criminals often try known passwords automatically on email, shopping, banking, and social accounts.

Password guidance from the National Institute of Standards and Technology recommends screening passwords against compromised values. Read the guidance

How exposed passwords are abused

Automated sign-in attempts

Attackers can test leaked passwords across many services at speed, relying on people reusing them.

Breach fallout

A breach at one service can create a risk at unrelated accounts when the same password is used again.

Predictable variations

Small changes, such as adding a number or year, can be easy to guess when attackers already know an older password.