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Check whether any email address has a valid format — and validate multiple addresses at once from a pasted list.
Email Validator · comprehensive syntax, typo, and disposable check · 100% private
Type a single address or paste a list (one per line) for batch validation.
Each address is checked against RFC 5322 format rules. Valid addresses are shown in green, invalid in red, with the specific reason for failure.
Export only the valid email addresses from a batch — useful for cleaning email lists before import.
It checks that the address conforms to RFC 5322 format rules: a local part (before @), an @ symbol, and a domain with at least one dot. It verifies the local part doesn’t have invalid characters or start/end with a dot, the domain has a valid TLD structure, and the overall format is parseable as an email address. It does not check whether the mailbox actually exists.
No. Format validation only confirms the structure is correct. Verifying whether a mailbox actually exists requires a DNS MX lookup and an SMTP probe — a network operation that can’t run purely in the browser. Format validation catches obvious errors (missing @, invalid characters, malformed domain) but cannot guarantee deliverability.
Yes. Paste a list of addresses one per line and all of them are validated simultaneously. The results show which are valid, which are invalid, and the reason for each failure — making it easy to clean an import list before uploading to an email service provider.
No. All validation runs in your browser. Email addresses are never uploaded or transmitted anywhere.
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Invalid email addresses in a database or mailing list cause bounce rates, spam score penalties, and wasted send volume. Catching format errors at the point of entry — or cleaning a list before import — is significantly cheaper than dealing with the consequences of sending to malformed addresses. This validator checks any email address or batch of addresses against the RFC 5322 format standard, identifying specific failures rather than just pass/fail, and exports a clean list of valid addresses for direct import to your email service provider.
All validation runs in your browser. Email addresses are never uploaded or transmitted to any server.
