Remove Duplicate Lines
Delete repeated lines and optionally sort what remains.
Result
About this tool
Clean up any list by removing duplicate lines — useful for email lists, keyword lists, CSV columns and log files. Options let you ignore case, trim surrounding spaces before comparing, and sort the unique lines alphabetically. A live count shows how many duplicates were removed.
How to use the Remove Duplicate Lines
- 1Paste your list — one item per line — into the input box.
- 2Toggle options: ignore case, trim spaces, or sort the results.
- 3Copy the deduplicated list and see how many duplicates were removed.
Frequently asked questions
Does it keep the original order?
By default it keeps the first occurrence of each line in its original order. Enable sorting if you prefer alphabetical output.
Can it ignore differences in capitalization?
Yes. Turn on "ignore case" so that Apple and apple are treated as the same line.
Is it good for cleaning email lists?
Yes — enable trim and ignore-case to catch duplicates that differ only by stray spaces or capitalization.