Privacy Tool

Email Breach Checker

Search over 12 billion leaked records to see if your email and password were exposed in a data breach.

📧 Check Email Breach

🔒 Your email is checked via the HaveIBeenPwned API using k-anonymity — only a partial hash is sent, never your full email.

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k-Anonymity Protection

Your email is hashed and only the first 5 characters of the hash are sent to the API. Your full email never leaves your browser.

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12B+ Records Searched

The HaveIBeenPwned database contains over 12 billion accounts from 700+ breaches including major sites.

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What to do if breached

Change your password immediately on the affected site and anywhere you use the same password. Enable two-factor authentication.

Frequently Asked Questions

How does the email breach checker work?

The tool checks your email address against a database of known data breaches compiled from publicly disclosed security incidents. If your address appears in a breach, the tool shows you which breach it was found in and what type of data was exposed.

Is it safe to enter my email address?

Yes. Your email address is only used to perform the breach lookup and is not stored, logged, or added to any mailing list. The query is made over a secure HTTPS connection.

My email appeared in a breach — what should I do?

Change your password on the affected site immediately, especially if you reuse that password on other accounts. Enable two-factor authentication where available. If financial data was exposed, monitor your accounts and consider placing a fraud alert with credit bureaus.

Is it safe to enter my email here?

Yes. Your email is never sent to our servers or the HIBP API in plain text. We use k-anonymity: your email is hashed in your browser, only the first 5 characters of the SHA-1 hash are sent, and the API returns all matching hashes. Your browser then checks locally if your full hash is in the results. Your actual email is never transmitted.

What should I do if my email is in a breach?

1. Change your password on the breached site immediately. 2. Change your password on any other site where you used the same password. 3. Enable two-factor authentication wherever possible. 4. Watch for phishing emails that may reference the breached service.

What is HaveIBeenPwned?

HaveIBeenPwned (HIBP) is a free service created by security researcher Troy Hunt that aggregates data from publicly known data breaches. It contains over 12 billion records from 700+ breaches and is widely trusted by security professionals worldwide.

What a breach check tells you

When a company is hacked, its customer data, usually email addresses and often passwords, names, phone numbers or home addresses, frequently ends up published or sold. This checker looks up an email address in known breaches so you can see which of your accounts have been exposed and what was leaked.

If your email appears in a breach

Change the password on the breached site and on every other site where you used the same one. Attackers try leaked email and password pairs everywhere, a technique called credential stuffing.
Turn on two-factor authentication, above all for your email account, since it can reset everything else.
Watch for targeted phishing. Leaked names and details make scam emails far more convincing.
If financial or identity data leaked, watch your bank statements and consider a credit freeze where that is available.

If your email is not found

That is good news, but not a guarantee. Many breaches are never made public, and some are only discovered years later. Unique passwords and two-factor authentication protect you either way.

Reduce future exposure

Use a password manager so every account has a different password. Check how strong yours are with the password strength checker.
Use email aliases for shopping and sign-ups, so a breach reveals only a throwaway address.
Delete accounts you no longer use. Data you have removed cannot leak.