Duplicate Email Remover
Remove duplicate email addresses from any list in seconds. The OutSends duplicate remover is case-insensitive, keeps the first occurrence, and runs entirely in your browser.
How it works
Get started with duplicate email remover in a few simple steps.
Paste your list
Paste emails with duplicates — from sign-ups, exports, or merged spreadsheets.
Click Remove Duplicates
The tool keeps the first occurrence of each address and counts how many duplicates were removed.
Export the unique list
Copy the deduplicated list or download it as CSV.
Why use this free tool
Everything you need, integrated in one workspace.
- Case-insensitive deduplication — [email protected] and [email protected] count once
- Shows exactly how many duplicates were removed
- One-click CSV export
- Free forever, private, runs in your browser
Related tools
More free tools to power your email workflow.
Frequently asked questions
Is the duplicate email remover free?
Yes, it is free and runs entirely in your browser, with no sign-up required.
Does it treat uppercase and lowercase as duplicates?
Yes. Emails are case-insensitive, so the tool compares addresses ignoring capitalization and removes duplicates regardless of case.
Can it handle very large lists?
Absolutely. Deduplication happens locally, so even large lists are processed instantly.
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