Remove Duplicate Lines

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Remove Duplicate Lines

Paste a list or block of text and remove duplicate lines instantly. Supports case sensitivity and whitespace trimming.

How to use the duplicate line remover

Paste your list or text into the box, choose whether the comparison should be case-sensitive and whether to trim extra whitespace, then click "Remove duplicates". The tool keeps only one copy of each line and shows how many were removed.

Frequently Asked Questions

Does this tool send my text to a server?

No. Everything runs in your browser — your text is never uploaded or stored anywhere.

What’s the difference between keeping the first vs. last occurrence?

With the default setting, the tool keeps the first line it sees and removes later copies. Uncheck it and the tool keeps the content of the last copy instead, at the position where the line first appeared.

Can I remove duplicates without caring about uppercase/lowercase?

Yes — turn off "Case-sensitive" so Apple and apple are treated as the same line.