Email Syntax Validator
Check if an email address has valid syntax. Instantly detect formatting errors, invalid characters, and common typos.
About This Tool
Before you send an email, make sure the address is formatted correctly. This free tool checks email syntax in real time as you type, catching formatting errors, invalid characters, missing components, and common typos like 'gmial.com' or 'outlok.com'. It's a quick first check — for full deliverability verification, use Cleanlist's email verification service.
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Cleanlist provides verified, production-grade data enrichment and email verification across 15+ providers.
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What does the email syntax validator check?
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The validator checks RFC 5322 email format compliance: proper use of @ symbol, valid local part characters, valid domain format, and TLD presence. It also checks for common typos in popular domains (gmail, outlook, yahoo) and flags role-based addresses like info@ or support@.
Is syntax validation the same as email verification?
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No. Syntax validation only checks if an email is formatted correctly — it doesn't check if the address actually exists or can receive mail. A syntactically valid email can still bounce. For full verification, use Cleanlist's email verification which checks mailbox existence, catch-all status, and deliverability.
Can I validate emails in bulk with this tool?
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This free tool validates one email at a time for quick checks. For bulk email validation — verifying hundreds or thousands of addresses — use Cleanlist's batch verification via CSV upload or API. Bulk verification also includes mailbox-level checks that go beyond syntax.
Need production-grade data?
This free tool gives you a taste. Cleanlist delivers verified emails, phone numbers, and firmographic data from 15+ providers — at scale.