How to remove duplicate lines

Repeated lines commonly appear after combining lists, exporting records, or copying text from multiple sources. Removing them makes the result easier to read and prevents repeated values from affecting later work.

A simple cleanup process

1. Paste the text into the duplicate-line remover.
2. Check whether capitalization and spacing should be treated as meaningful.
3. Review the output before copying it into another system.

Blank lines can be cleaned separately with the whitespace cleaner.