Duplicate Line Remover
Paste a list of lines to remove duplicates while keeping the first occurrence of each, with optional case-insensitive matching and whitespace trimming.
Input
Result (2 duplicates removed)
Ad space
Frequently asked questions
Which occurrence is kept when a duplicate is found?+
The first one; later duplicates are removed and original line order is preserved.
Can it treat "Apple" and "apple" as the same line?+
Yes, turn off "Case-sensitive" to match lines regardless of capitalization.
Does it sort the lines afterward?+
No, use the Text Sorter tool afterward if you also want the deduplicated list sorted.