Text Tools

Remove Duplicate Lines

Clean up lists by removing repeated lines — with case, trim, sort, and keep-order controls.

Case-insensitiveTrim whitespaceRemove empty lines

Keep

Sort

Input lines

Unique lines

Duplicates removed

Empty removed

input.txt

unique-lines.txt

apple
banana
Apple
cherry
date

elderberry

How to use Remove Duplicate Lines

Paste your text or list into the input panel.
Toggle Case-insensitive to treat Apple and apple as the same line.
Use Trim whitespace so lines that differ only by leading/trailing spaces count as duplicates.
Choose to keep the first or last occurrence, optionally sort the result, and drop empty lines.
Copy or download the cleaned-up list. The stat cards show exactly how many duplicates were removed.

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