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Duplicate Remover — Remove Duplicate Lines Online

Remove duplicate lines from email lists, CSV columns, keyword lists, logs, and pasted text while preserving the first occurrence. Use whitespace trimming and ignore-case matching when you need cleaner unique results.

How to Use Duplicate Remover to Clean Lists

Quick Start Guide

1

Paste a list or text block with one item per line.

2

Choose whether to trim whitespace and ignore letter case.

3

Remove duplicate lines and compare the unique and removed counts.

4

Copy the cleaned list for spreadsheets, scripts, or documents.

Frequently Asked Questions

Yes. It keeps the first occurrence of each unique line and removes later duplicates.
Ignore Case treats values like Apple and apple as the same item when removing duplicates.
Enable it when spaces before or after a line should not create separate duplicate entries.
Yes. Paste one value per line from a spreadsheet column, remove duplicates, and copy the cleaned result back.

Still have questions? Check out our other tools or contact us for support.

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