Turning rough line-based text into a list you can trust
Line tools are useful for the everyday cleanup jobs that fall between a text editor and a spreadsheet: sorting rows, reversing order, adding numbers, removing blanks, trimming prefixes, comparing line sets, or making one item per line. They work well for keyword lists, filenames, IDs, research notes, inventory labels, and other simple records.
Many list operations are destructive. Sorting changes sequence, unique filters remove repetition, and trimming can remove characters that were intentional. If the list will be imported or used as a source of truth, keep the original alongside the cleaned version so you can trace what changed.