Paste a list and this tool removes duplicate lines, leaving one copy of each unique line in its original order. It is perfect for cleaning up email lists, log files, exported spreadsheets, keyword lists or any text where the same line got pasted twice. You can choose to ignore case so Apple and apple count as the same, and trim surrounding spaces so trailing whitespace does not fool the match. The tool also reports how many lines were removed so you know exactly what happened. Nothing is uploaded. All the deduplication runs locally in your browser, which keeps even large or private lists fast and safe.