External
Have I Been Pwned
Find out which data breaches leaked your email address.
Have I Been Pwned, run by security researcher Troy Hunt, checks whether your email address appears in known data breaches and can notify you about future ones. It is free and has become the canonical breach lookup service.
Best for: Use this when you want to know if your credentials are already floating around from past breaches.
Pros
- The most trusted breach dataset publicly searchable
- Free breach notifications for your address
- Password range API lets sites check passwords safely
Cons
- Absence from the results does not mean you are safe
- Only covers breaches that have been ingested
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