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Remove Duplicate Lines
Clean a list by removing repeated lines while preserving order, with options to ignore case and surrounding whitespace.
Input
Result
1 duplicate line removed
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
Does it keep the first or last copy?＋
It keeps the first occurrence of each line and removes later duplicates, preserving the original order.
Can it ignore case?＋
Yes — enable case-insensitive matching so lines that differ only in capitalisation count as duplicates.
Is my text private?＋
Yes — de-duplication runs entirely in your browser.