// BREACH
Email Breach Check
Check whether an email address appears in known data breaches and paste dumps indexed by public breach databases.
// Understanding data breaches
When a company is hacked, the stolen login details often end up in public 'breach' collections that circulate online. If your email was part of one, attackers may know a password you used — and if you reused it, every account with that password is at risk. This is called credential stuffing, and it's behind most account takeovers.
This tool checks your email against known, publicly indexed breach datasets (via the XposedOrNot service). To be clear about scope: it does not scan the entire dark web or any private/illegal marketplace — it matches against breach databases that have already been catalogued. A clean result means your address wasn't found in those datasets, not a guarantee that it was never exposed.
If your email shows up in a breach, don't panic — act. Change the password on the affected service, switch to a unique password there (and anywhere you reused it), and turn on two-factor authentication. A password manager makes unique passwords per site practical.
// Frequently asked questions
- Does this search the entire dark web?
- No. It checks your email against known, already-indexed public breach databases via the XposedOrNot service. It does not crawl the dark web or access private marketplaces, and no scan of this kind is exhaustive.
- Do you store my email address?
- No. The address is sent to the breach-lookup service to run the check and is not saved by Vuther.
- My email is in a breach — what should I do?
- Change the password on the affected account and anywhere you reused it, enable two-factor authentication, and start using a unique password per site (a password manager helps).
- How often should I check?
- Checking every few months, and any time you hear about a breach at a service you use, is reasonable. New breach data is catalogued continuously.
- What kinds of data get exposed in breaches?
- Commonly emails, passwords (often hashed), usernames, names, phone numbers and IP addresses — and sometimes more sensitive data depending on the breach.