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.
Private by default
This tool runs entirely in your browser. Nothing you paste or open is sent to our servers.