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CSV Email List Cleaner

Clean pasted or uploaded CSV email data, remove duplicates, flag invalid syntax, and download clean and rejected results.

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How to use this tool well

Work with the real content or domain you plan to send from, so the findings match your live setup.
Treat every result as practical guidance. Automated checks reduce risk, but no tool can guarantee inbox placement.
Fix the highest-severity findings first, re-run the check, then move the improved version into a campaign.

Score clarity, length, urgency, and risk.

Find content risks before you send.

Inspect email HTML and repair common issues.

Create your free BulkMailer account and turn this result into a campaign.