Remove Duplicate Lines
Free tool to remove duplicate lines from any text or list. Clean up CSV data, word lists and code lines instantly in your browser.
Result appears here...About Remove Duplicate Lines
Paste a list or block of text and get a clean version with repeated lines removed. Great for cleaning CSV exports, deduplicating word lists, tag lists, or any data where the same line appears more than once. You can also choose to keep only the unique lines or only the duplicates themselves.
How to use it
- 1Paste your text - each line is treated as one item.
- 2The tool shows how many lines were duplicates.
- 3Copy the cleaned list, or switch to "only duplicates" mode if you want to see what was repeated.
Examples
Cleaning a word list
apple
banana
apple
cherry
banana
apple3 unique lines kept, 3 duplicates removed
apple
banana
cherryDeduplicating an email list
2 duplicates removed
[email protected]
[email protected]
[email protected]Frequently asked questions
Does it ignore leading and trailing spaces?
Lines are compared after trimming surrounding whitespace, so " apple" and "apple" count as the same line. The original line text is preserved in the output.
Is line order preserved?
Yes. The first occurrence of each line keeps its position, and later duplicates are removed.
Does it work with CSV data?
Yes, if your data is one record per line. Paste the rows and the tool removes identical rows while keeping the first one.