Remove Duplicate Lines
Clean up a list by removing repeated lines, keeping the first occurrence of each.
Runs entirely in your browser. Nothing is sent anywhere.
How it works
- 1Paste a list, one entry per line.
- 2Adjust how duplicates are matched, if needed.
- 3Copy or download the deduplicated result.
About this tool
Paste a list — emails, URLs, names, anything one-per-line — and get back a cleaned-up version with every duplicate removed, keeping the first occurrence of each line in its original position.
Which occurrence does it keep?
The first one — later duplicates of the same line are removed, and the remaining lines stay in their original order.
Can it ignore capitalization or extra spaces when comparing?
Yes, turn on "Ignore case" and/or "Trim whitespace" to match lines that only differ by case or leading/trailing spaces.
Is my text sent anywhere?
No, everything happens entirely in your browser.