Runs locally
Remove Duplicate Lines
Deduplicate line-based text while keeping the first occurrence.
Input is processed in your browser and is not uploaded.
Output
Results appear here.Unique lines: 0 · Duplicates removed: 0
This duplicate line remover is useful for cleaning keyword lists, logs, CSV columns, IDs, URLs, and copied spreadsheet values. It can preserve order or sort the final list. Lightweight, mobile-friendly, and built for quick repeat use.
FAQ
Does it preserve the original order?+
Yes. By default the first occurrence stays in place and later duplicates are removed.
Can it ignore case?+
Yes. Turn off case sensitivity to treat lines like Apple and apple as duplicates.
Are blank lines removed?+
Blank lines are treated as lines, so repeated blanks are deduplicated like other values.