Options
- Case-sensitive — off: "Apple" and "apple" count as duplicates; on: they are different.
- Ignore spaces — lines that differ only by leading or trailing spaces are treated as the same.
- Remove empty lines — blank lines are dropped.
The original order is kept, and the result shows how many duplicates were removed. Typical uses: cleaning email lists, merging keyword research, deduplicating URLs before a bulk check.
To also sort the list, use Sort Lines; to clean URLs specifically, use the Bulk URL Cleaner.
Frequently asked questions
Does it keep the first or last occurrence?
The first occurrence is kept, in its original position.
Is there a limit on lines?
Lists with hundreds of thousands of lines work in a modern browser.
Is my list uploaded?
No, it is processed in your browser.