Free online tool
Remove Duplicate Lines
Keep the first occurrence of each line with optional case matching.
How to use this tool
- 1Choose or drop your file.
- 2Adjust the available options.
- 3Process and download the result.
Private browser processing
Your file is processed on this device and is not uploaded to our server.
Frequently asked questions
Is my file uploaded?
No. File processing happens locally in your browser.
Does it work on phones?
Yes. It works in modern mobile and desktop browsers.