Free · no sign-up · up to 100 at once · nothing stored
Clean your list before it burns your domain.
Every bounce hurts your sender reputation. Paste one address or a hundred — we run live DNS lookups on every domain (real MX records, SPF/DMARC posture, registration age) and flag disposables, role accounts, and gibberish before you hit send.
What this can and can't verify — honestly
No free browser tool can confirm that a specific mailbox exists: that requires a live SMTP handshake, which mail providers block from cloud services (tools that claim otherwise are guessing). What can be verified — and what we verify with live lookups — is everything up to the mailbox: valid syntax, a domain that actually runs mail servers, its authentication posture, its age, and known disposable or role patterns. That catches the large majority of bad addresses. For mailbox-level confirmation on high-stakes sends, use this as your free pre-flight, then pay a per-contact verifier only for the survivors.
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