Yes. The first occurrence of each line is kept, and later duplicates are removed, so the remaining lines keep their original relative order.

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Duplicate Line Remover

Remove duplicate lines from a block of text while preserving the original order of first occurrences.

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Duplicate Line Remover

Ignore case when comparing

2 duplicate lines removed.

apple
banana
cherry

What is Duplicate Line Remover?

Remove duplicate lines from a block of text while preserving the original order of first occurrences.

How it works

SiteIndex compares each line against the lines already seen and keeps only the first occurrence, with an option to ignore case and trim whitespace before comparing.

Where a network request is required, SiteIndex validates public HTTP/HTTPS targets before making the request.

Common uses

Clean up a mailing list or keyword list that has repeated entries.
Deduplicate a list of URLs before bulk-processing them.
Merge two lists and remove any lines that appear in both.

Limitations

Results depend on the browser, network, input, and external service involved.
This tool is informational and does not replace specialist diagnostics or professional advice.

FAQ

Does order matter?: Yes. The first occurrence of each line is kept, and later duplicates are removed, so the remaining lines keep their original relative order.

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