Email list duplicate remover
Deduplicate CSV rows by normalized email address and download the cleaned CSV.
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Your result
Add your inputs, or try the example, to see your result here.
No address is sent to a verification service.
How to use this tool
- Parse CSV locally.
- Trim and lowercase addresses to find duplicates; retain the first row.
- Escape spreadsheet formulas in the downloaded CSV.
What the result tells you
- No address is sent to a verification service.
- Local-part case can technically matter to some providers; matching is deliberately case insensitive.