Remove Duplicate Lines
Paste a list and remove every repeated line, keeping the first occurrence of each -- useful for cleaning up email lists, keyword lists, or exported data.
How it works
- Paste your list.
- Optionally ignore case or leading/trailing spaces.
- Copy or download the deduplicated result.
Features
- Free, no sign-up, no watermark
- Runs entirely on your device -- nothing is uploaded
- Optional case-insensitive matching
- Optional trim before comparing
- Shows how many lines were removed
Frequently asked questions
Is removing duplicate lines free?
Yes, completely free with no sign-up, no watermark, and no limit on how often you use it.
Is my text uploaded anywhere?
No. Every conversion runs in your browser, on your own device. Your file is never sent to a server or stored anywhere but your device.
Which occurrence does it keep?
The first one -- later duplicates of the same line are removed, original order is otherwise preserved.
Does this work on mobile?
Yes -- it works in any modern browser on a phone, tablet, or desktop, with no app to install.