Paste an email address or text containing addresses — the tool finds emails, checks format, and shows errors, duplicates, and suggestions.
Email Format Checker is a free online tool for validating email format and extracting addresses from text. It finds emails in strings, lists, logs, and messages, checks for @, domain, TLD, extra spaces, repeated dots, duplicates, and common mistakes. Processing runs locally in your browser — text and email addresses are not sent to the UtiLab server. The tool checks format only; it does not verify mailbox existence or perform SMTP/MX checks.
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Email Format Checker helps you validate email addresses for basic correctness and extract emails from text. It finds addresses in strings, lists, logs, and messages, checks for @, domain, TLD, extra spaces, repeated dots, duplicates, and common formatting errors.
The tool is useful for form validation, mailing lists, CRM data, logs, applications, contacts, and test data. Processing runs locally in your browser — text and email addresses are not sent to the UtiLab server.
The tool checks format only. It does not confirm that a mailbox exists and does not perform SMTP, MX, or deliverability checks.