Enter an email address to see which known data breaches it appears in, what was leaked, and what to do about it. Then check whether a password you use has leaked, without it ever leaving your device.
We don't save the addresses you check. Results come from Have I Been Pwned, the largest public database of data breaches.
Type a password you use to see if it appears in leaked password lists. It never leaves this device: we only send the first 5 characters of a scrambled fingerprint of it, so nobody, including us, can see the password.
Leaked staff passwords are one of the main ways business email gets broken into. Check your business's email security for free, or let us watch it every day.
When a company is hacked, its customer lists often end up online. This checks the email against the breaches that have been made public. An address that isn't found can still have been exposed somewhere that hasn't come to light.
You'll see whether a password was part of a leak, never the password itself. Change it on that site and anywhere else you used it.
The email you check is sent to Have I Been Pwned to look it up and isn't stored by us. Passwords are checked on your device.
Breach data from Have I Been Pwned, used under the Creative Commons Attribution 4.0 licence.
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Results are guidance, not a guarantee. Never type a password into a site you don't trust.