Remove Duplicate Lines Online
Remove repeated lines while keeping the first occurrence in its original position.
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About This Tool
The Remove Duplicate Lines tool turns repeated lists into clean unique lists. It keeps the first occurrence of each exact line and removes later duplicates without uploading your text.
Benefits and Use Cases
- Clean keyword lists, email lists, URLs, IDs, and notes
- Remove repeated rows copied from spreadsheets or reports
- Deduplicate logs, plain-text exports, and research notes
- Preserve the original order of first occurrences
How to Use
- Paste your list into the input box.
- Click
Remove Duplicates. - Copy the unique lines from the output box.
Frequently Asked Questions
Does it preserve order?
Yes. The first time a line appears, it stays in that position.
Are uppercase and lowercase treated as duplicates?
No. Duplicate matching is exact, so Apple and apple are different lines.
Is this free?
Yes. It is free and runs in your browser.