Remove Duplicate Lines
Last updated: June 1, 2026Delete repeated lines instantly.
Remove Duplicate Lines is a free online tool to delete repeated lines instantly. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Remove Duplicate Lines
Remove Duplicate Lines deletes repeated lines from any list or text while keeping the original order, with optional case-insensitive and trim matching. It's ideal for cleaning lists, logs, emails and keyword sets. Free, private and runs in your browser.
- 1Paste your list or text.
- 2Toggle ignore-case and trim if needed.
- 3Copy the de-duplicated result.
Keeps order
The first occurrence of each line is kept in place.
Smart matching
Optionally ignore case and surrounding whitespace.
Free & private
Your list never leaves your device.
Remove Duplicate Lines — frequently asked questions
Does it keep the original order?
Yes — it removes later duplicates and keeps the first occurrence of each line in its original position.
Can it ignore case and spaces?
Yes, toggle 'Ignore case' and 'Trim whitespace' to treat near-identical lines as duplicates.
Is it free?
Yes, completely free.
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