Remove Duplicate Lines
Clean up lists by removing duplicate lines instantly. Optionally ignore letter case and trim spaces before comparing.
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How to use Remove Duplicate Lines
- Paste your list — one item per line.
- Choose whether to ignore case or trim spaces.
- Click Remove duplicates and copy the clean list.
Frequently asked questions
Is this tool free to use?
Yes. Remove Duplicate Lines is completely free with no sign-up, no watermarks, and no usage limits.
Are my files or data uploaded to a server?
No. Everything is processed locally in your browser using JavaScript. Your files and text never leave your device, which makes this one of the most private ways to get the job done.
Does it work on mobile?
Yes. The tool is fully responsive and works on Android, iPhone, tablets, and desktop browsers.