TEXT TOOL
Duplicate Line Remover
Remove duplicate lines from any list, keeping the first occurrence.
Lines removed
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About this tool
Paste any list of lines and instantly remove duplicates, keeping the first occurrence of each. Useful for cleaning up email lists, keyword lists, or any line-separated data before importing it elsewhere.
Frequently asked questions
- Which occurrence is kept when there's a duplicate?
- The first one — later duplicate lines are removed, and the original relative order of the remaining lines is preserved (unless you enable sorting).
- What does "ignore case" do?
- Treats lines like "Apple" and "apple" as duplicates of each other. The first-seen casing is kept in the output.
- Does this remove empty lines?
- Blank lines are treated like any other line — repeated blank lines collapse to one, consistent with the rest of the deduplication logic.