What is the Duplicate Line Remover?
Useful for cleaning up an email list, a keyword list, a spreadsheet column pasted as text, or any line-separated data that's picked up repeats from merging multiple sources. This tool scans your list top to bottom and removes every repeated line, keeping the first occurrence and the original order intact.
How to Use This Tool
- Paste your list into the Input box, one item per line.
- Toggle Case-sensitive matching on if "Apple" and "apple" should count as different lines.
- The de-duplicated result appears instantly — click Copy Result.
Frequently Asked Questions
Does it keep the first or last occurrence?
The first occurrence of each line is kept; later duplicates are removed. Line order is preserved.
Is there a case-sensitive option?
Yes — toggle case-sensitive matching on or off.
Last updated: August 2026
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