Have I Been Pwned
Check whether your email address appears in known data breaches.
Cost
Completely free
Free to search. Notification service is free.
Open source
No
The code is private. You depend on the company that makes it.
Your data
Goes to their servers
Your files and text are sent to the company running the service.
Use it for this
Finding out which of your accounts were exposed, and in which breach.
Do not use it for this
Detecting breaches that have not been made public.
A moment where you would reach for it
Discovering that a site you forgot about leaked your password in 2019 — and that you reused it.
How hard is it to pick up?
Anyone can use this on day one.
Worth knowing before you use it
Run by a well-known security researcher. Searching does not store your address unless you subscribe to alerts.
About this entry
Checked on 1 Sept 2026. Prices and free limits change without warning, and often quietly. Treat everything above as a starting point and confirm on the official site before you rely on it.
Nothing here is sponsored. A tool appears because it solves a real problem, not because someone paid for it to be listed.