Side project tool
Email Validity Verifier
Upload an Excel workbook, extract every email, and verify it with free DNS checks. If a provider key is configured later, the same tool automatically upgrades to deeper mailbox signals.
Max 10,000 unique emails
No file selected0 / 0 checked
Upload an Excel workbook to begin.
Free mode checks format and domain mail records. It can catch bad domains, but it cannot prove a specific inbox is alive without SMTP or a verification provider.
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Valid
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Invalid or Dead
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Risky
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Duplicates