Delete duplicate lines, sort, trim, and clean up lists in one click.
🔒 This tool runs entirely in your browser. Nothing you enter or upload is sent to our servers.
How to use the Remove Duplicate Lines
- Paste your list or text into the box.
- Choose options (case-insensitive matching, trimming, sorting…) and click Clean.
- Copy the cleaned result. The counts show how many lines were removed.
About this tool
Perfect for cleaning email lists, keyword lists, log output, CSV columns and any text where each line is an item. Duplicate detection keeps the first occurrence of each line. Natural sort orders “item2” before “item10”, the way people expect.
Frequently asked questions
Does it keep the original order?
Yes, unless you choose a sort option. Duplicates are removed keeping the first occurrence.
Are lines that differ only in capitalisation treated as duplicates?
Only if you tick “ignore case”.
Is there a size limit?
No practical limit — hundreds of thousands of lines are processed in your browser in well under a second.