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Remove Duplicate Lines

Remove repeated lines while preserving their original order.

Processed locally. Your data is not uploaded.

Case-sensitiveTrim whitespace

Text input

Drop a file here, or

Unique lines

About this tool

This tool removes repeated lines without sorting them, with controls for capitalization and surrounding whitespace.

How to use it

Paste text or choose a file.
Set case and whitespace matching options.
Remove duplicates, then copy or download the result.

Common uses

Useful for cleaning email lists, identifiers, URLs, logs, keyword lists, and copied spreadsheet columns.