Unique lines
This runs in your browser. Nothing is uploaded.
About Duplicate line remover
Remove duplicate lines, keeping the first occurrence.
Optional case-insensitive mode.
How to use Duplicate line remover
- 1Paste lines.
- 2Replace input with unique lines if desired.
Common questions
Is order preserved?
Yes — first wins.
Related tools
Why this one doesn't upload your file
There is no server to upload to. This page is a static file, and the work happens in your browser using the same graphics and WebAssembly code that renders every other site you visit. Your file is read from disk into memory, processed, and handed back as a download. Once the page has loaded you can disconnect from the network entirely and it keeps working. The longer explanation