Free Dark Web Scan for Business Email Addresses
Check whether your business email addresses appear in known data breaches. See what information was exposed and what to do next. No signup required.
Check up to 25 business email addresses
The scan compares the addresses you submit with known breach records and reports the breach name, date, and categories of exposed data. It never asks for a password.
- Free to use
- No account required
- Submitted email addresses are not stored
Enter one address per line, with a maximum of 25. Only check addresses you are authorized to use.
Email addresses are used only to complete the lookup and are not stored. Basic usage and security information is recorded. See details.
Breach data provided by Have I Been Pwned.
What your scan results mean
The result shows whether an address appears in the breach data available to this lookup. Use the labels as a starting point for your response.
| Result | What it means | What to do |
|---|---|---|
| Email address exposed | The address appeared in one or more known breach records. | Expect more convincing phishing and review the affected accounts. |
| Passwords listed | The breached service reported that password data was part of the incident. The scanner does not reveal the password. | Change the affected password and every account where it was reused. |
| Personal information listed | The breach included data such as names, phone numbers, physical addresses, or dates of birth. | Watch for impersonation and personalized phishing attempts. |
| Nothing found | No match was found in the data available at the time of the scan. | Keep unique passwords, strong multifactor authentication, and ongoing monitoring in place. |
What to do if password data was exposed
- Change the password for the affected service.
- Change it anywhere else it was reused. Use a different password for every account.
- Turn on strong multifactor authentication. Phishing-resistant methods such as passkeys or security keys provide the best protection where supported.
- Review Microsoft 365 sign-in activity. Look for unfamiliar devices, locations, and failed sign-ins.
- Revoke suspicious sessions. Do not assume a password change ends every active session.
- Check mailbox rules and forwarding. Remove anything you did not create.
- Keep monitoring. New breach records can appear after today’s scan.
Want help reviewing an exposed account?
Wolferdawg IT Consulting can help you review Microsoft 365 sign-ins, strengthen multifactor authentication, and prioritize the accounts that need attention first.
Book a 30-minute reviewHow this dark web scan works
The tool sends each submitted address to Wolferdawg’s protected lookup endpoint. That endpoint uses an API key to query breach records from Have I Been Pwned, which reports more than 17 billion breached accounts. The result includes the breach name, breach date, and categories of exposed data available through the service.
A match means the address appears in indexed breach data. It does not automatically mean the associated Microsoft 365 account was compromised. If password data was included and that password was reused, an attacker may try it against other services.
Privacy and limitations
Submitted email addresses are used only to complete the lookup and are not stored. The tool never requests or returns your password.
For service operation and abuse prevention, Wolferdawg records basic usage and security information, including the request time, IP address, approximate city and country, request status, and aggregate counts such as addresses checked and breaches found.
A clean result is not proof that an account is safe. Some incidents may not be public, indexed, or available through the lookup, and new breach data can appear later. A listed breach date describes when the incident occurred, not necessarily when its data became public.
Reviewed by Dieter Wolf, founder of Wolferdawg IT Consulting
27+ years in IT and cybersecurity. Last updated August 25, 2026.
More free security tools
Check your email authentication or learn how to lock down your Microsoft 365.
Dark web scan common questions
Plain answers about what the dark web scan checks, what your results mean, and what to do next.
What does this dark web scan check?
It checks the business email addresses you submit against breach records available through Have I Been Pwned. For each match, the tool reports the breach name, breach date, and categories of exposed data.
Does the scan reveal my actual password?
No. The tool never asks for your password and does not return the exposed password. A Passwords label means the breached service reported that password data was included in that incident.
Does a breach result mean my Microsoft 365 account was hacked?
Not necessarily. The result usually means the email address appeared in a breach at another website or service. If the exposed password was reused for Microsoft 365, an attacker may try it there, so the affected password should be changed and multifactor authentication should be enabled.
What should I do if Passwords appears in the result?
Change the password for the affected service, then change it anywhere else it was reused. Turn on strong multifactor authentication, review recent sign-ins, revoke suspicious sessions, and check mailbox forwarding rules.
What does a clean result mean?
A clean result means the address was not found in the breach data available to this lookup at the time of the scan. It does not prove the account is safe or that the address has never been exposed. Keep using unique passwords, strong multifactor authentication, and ongoing monitoring.
What is the difference between a dark web scan and dark web monitoring?
A scan is a one-time snapshot of currently available breach data. Monitoring repeats the check over time and alerts you when a new exposure appears, so you can respond sooner.
Are submitted email addresses stored?
No. Submitted email addresses are used to complete the lookup and are not stored. The service records basic usage and security information, including the request time, IP address, approximate location, status, and aggregate result counts.
Can I check employee email addresses?
Yes, if you are authorized to check them. You can submit up to 25 business email addresses per scan, one address per line.