Duplicate Line Remover
Remove duplicate lines from text, optionally sort the output.
Examples
| Input | Result |
|---|---|
| apple\nbanana\napple\ncherry\nbanana | apple\nbanana\ncherry (2 duplicates removed) |
| dog\ncat\nbird\ncat\ndog\ndog (with sort) | bird\ncat\ndog (sorted alphabetically, 3 duplicates removed) |
| one\ntwo\nthree\nfour | one\ntwo\nthree\nfour (0 duplicates removed) |
About this tool
This tool removes duplicate lines from a block of text. Paste in a list with repeated entries and it strips out the extras, keeping only the first occurrence of each unique line. You can optionally sort the output alphabetically.
It is especially useful for cleaning up data exports, mailing lists, log files, or any situation where you have a list with repeated values. The tool shows you how many duplicates were found and removed, so you know exactly what changed.
Frequently asked questions
Does the tool preserve the original order of lines?
Yes, by default it keeps the first occurrence of each line in its original position. You can optionally toggle "Sort output alphabetically" to sort the deduplicated results.
Is the duplicate check case sensitive?
Yes. Lines must match exactly, including casing and whitespace, to be considered duplicates.
Can I remove duplicates from a CSV or spreadsheet column?
If you paste a single column of values (one per line), the tool will remove duplicate entries. It works on any line-separated list.