Email list format checker
Review CSV structure, empty addresses, and basic email syntax without contacting mail servers.
Your inputs stay in this browser. No account needed.
Your result
Add your inputs, or try the example, to see your result here.
Syntax checks cannot prove mailbox existence or deliverability.
How to use this tool
- Parse CSV and locate the email column.
- Count empty, malformed, duplicate, and role-based values.
What the result tells you
- Syntax checks cannot prove mailbox existence or deliverability.
- Internationalized and unusual valid addresses may require manual review.