Email Breach Checker
Check if your email address has appeared in any known data breaches.
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How it works
This tool checks your email against databases of known data breaches — company hacks where usernames, passwords, or other personal data leaked publicly. A match means your credentials from that breach could already be circulating.
If your email shows up in a breach, the important step is changing the password on that account — and any other account where you reused it — not just noting that it happened.
Related reading
Frequently asked questions
What should I do if my email shows up in a breach?
Change the password on that account immediately, and on any other account where you reused it — then enable two-factor authentication wherever it's offered.
Does a 'not found' result mean my email was never leaked anywhere?
It means it wasn't found in the breach databases this tool checks — no breach-checking service has visibility into every leak that has ever occurred, so it's a strong signal, not an absolute guarantee.
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