Search a specific email address against known data breaches, and see whether its domain has been breached. Powered by XposedOrNot and Have I Been Pwned.
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Data breaches are the raw material of credential stuffing, account takeover and targeted phishing. This checker uses Have I Been Pwned's public breach database to tell you whether the domain in your email address has been involved in a known breach, and links directly to HIBP's per-account lookup so you can check the exact mailbox.
Type or paste the email you want to inspect into the input field at the top of the page.
Click the check button — the tool queries live data sources and returns results in seconds.
Review each finding: status, score, and the reason behind every warning are listed line by line.
Follow the linked remediation guides to fix issues, or copy the report to share with your team.
When something in your stack misbehaves, half the battle is figuring out whether the problem is you, the network, or the other side. Email Breach Checker gives you a fast, opinionated readout so you can rule things in and out in seconds. Because the check runs on live infrastructure and reports raw results — not marketing-safe summaries — you can trust what you see and act on it. Toolzer's design philosophy is simple: privacy-first (no tracking, no accounts), performance-first (the page is interactive in under a second on a 3G connection), and honesty-first (no fake ratings, no dark patterns, no upsells). Email Breach Checker follows the same rules as every other utility on the site. You can bookmark this page, share the URL with a colleague, or pin it to your browser's toolbar — the experience will be identical every visit, and it will keep working even if you're on airplane Wi-Fi. Real people use this tool for real work — freelancers cleaning up client deliverables, sysadmins triaging tickets, students finishing assignments — and it is tuned for those workflows, not for demo videos.
Have I Been Pwned's free public /breaches endpoint, maintained by security researcher Troy Hunt. We never see or store the email you check.
The domain query confirms the service was breached. To check a specific address, use the HIBP deep-link we render.
It means no breach affecting that domain is publicly known. Strong unique passwords and 2FA still matter.
Change the password on the affected service, rotate any password you reused elsewhere, and enable 2FA.
No. Every utility on Toolzer is free, anonymous, and works in any modern browser without registration.
Yes. Whenever the tool can produce an answer entirely in the browser, the data never leaves your device.
Yes. The interface is fully responsive and works on iOS Safari, Android Chrome, and every modern mobile browser.
Yes. Every Toolzer page has a clean permanent URL you can bookmark or share.
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