How the removal works
The text is split into lines, and each line is compared against the previous ones. The first occurrence of each line is kept in its original position; later repeats are discarded. The options below adjust how that comparison is made.
What each option does
Ignore case: treats "Banana" and "banana" as the same line. Trim whitespace: strips extra spaces before comparing, so " item" and "item" become the same line. Remove empty lines: discards any blank line before duplicates are even checked. Sort result: arranges the unique lines alphabetically instead of keeping their original order of appearance.
Common use cases
Cleaning up email lists, removing repeated URLs from a log file, consolidating keyword lists for SEO, organizing a to-do list pasted from different sources, or just tidying up any pasted list with repeated items.