Remove Duplicate Lines
Strip duplicate lines from a list, with optional sorting.
About the Remove Duplicate Lines
The Remove Duplicate Lines tool strips repeated lines from a list, with options to ignore case, sort the result and trim stray spaces. It is the quick way to clean an email list, a set of keywords or any pasted column of data.
Frequently asked questions
It keeps the first occurrence of each line and removes the rest, so the original order of unique lines is preserved unless you turn on sorting.
With it on, lines that differ only in capitalisation — like Apple and apple — are treated as the same and collapsed to one. With it off, they are kept as separate lines.