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Remove Duplicate Lines

Email lists, keywords, name lists — paste them in and duplicates are removed instantly, keeping the original order intact.

🔒 Text is processed in your browser — nothing is ever sent anywhere

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What is it used for?

A duplicate address in an email campaign list risking spam reports, duplicate keywords throwing off an SEO analysis, the same name appearing twice on an attendance sheet — one tool solves all of it. Even lists with hundreds of thousands of lines get cleaned instantly, and each item's first occurrence keeps its original position.

FAQ

Which line is kept — the first one or the last one?
The first one. Each item's first occurrence is kept and later duplicates are removed, so the order of the list never changes.
What does "treat upper/lower case as the same" mean?
When enabled, Apple, APPLE and apple are all treated as identical, and only the first one is kept. It's a good idea to enable this for email lists.
Does it work with Bangla text?
Completely — it finds exact matches between lines in any language and removes the duplicates.

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