free tools
Free email & domain tools
Everything the API knows, one question at a time. No signup for single checks; bulk checks use your free key.
- Bulk email checkerUpload a CSV of email addresses and see which are work emails, personal, disposable or invalid — with Google Workspace and Microsoft 365 detection. Free with an account.open tool →
- Disposable email checkerCheck if an email address or domain is a disposable, temporary or throwaway inbox (Mailinator, 10minutemail, Guerrilla Mail and thousands more). Free, instant, no signup.open tool →
- Free email provider checkerFind out if an address uses a free or shared email provider such as Gmail, Outlook, Yahoo, iCloud, GMX or a consumer ISP — or a company-owned domain.open tool →
- MX lookupLook up the MX records of any domain and see which email provider handles its mail — Google Workspace, Microsoft 365, Proofpoint, Mimecast and more.open tool →
- SPF & DMARC checkerCheck a domain’s SPF record, its includes and its DMARC policy (none, quarantine or reject) in one lookup.open tool →
- Google Workspace checkerFind out if a company domain uses Google Workspace (formerly G Suite) — from MX, DKIM, SPF and verification records, even behind a mail gateway.open tool →
- Microsoft tenant lookupLook up a domain’s Microsoft 365 / Entra ID tenant: tenant ID, region, managed or federated sign-in and the identity provider (Okta, ADFS, Ping…).open tool →
- Open data listsDownload the free-provider, disposable and education domain lists as TXT, CSV or JSON.browse lists →