📧 Email Validator (Bulk)
Bulk-validate large lists of email addresses (one per line). Checks include RFC 5322 syntax, disposable domains (30+ services), role accounts (admin@, info@), duplicates and case-mismatch detection. CSV export.
✅ 100% free, no signup, runs entirely in your browser
🔒 About Privacy (Important)
- ・All validation runs entirely in your browser (JavaScript)
- ・The email addresses you enter are never sent to any server
- ・Browsers cannot query MX records directly, so DNS verification is out of scope
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📖 How to Use
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1
Paste the listPaste email addresses one per line into the textarea. Surrounding whitespace and quotes are trimmed automatically.
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Click ValidateRuns RFC 5322 syntax, disposable-domain, role-account, duplicate and case-mismatch checks together.
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Export valid as CSVUse "Valid as CSV" to download only the rows judged valid. Handy for cleaning a list before email marketing.
❓ FAQ
How are disposable emails detected?
We match against a built-in list of 30+ major disposable domains (10minutemail, mailinator, tempmail, guerrillamail, yopmail, etc.). This is not exhaustive — commercial SaaS APIs have higher coverage.
Can you verify MX records?
No. Browsers cannot query DNS directly, so MX verification is out of scope. For that you need a server-side DNS API.
What is a role account?
Addresses like admin@, info@, support@, sales@ that map to a team rather than a person. Sending marketing in bulk to these often hurts deliverability, so we flag them as warnings.
🔗 Related Tools
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