Duplicate Line Remover

What is Duplicate Line Remover?

Cleaning logs, organizing name lists or processing exported columns often means deleting repeated lines. This tool deduplicates by line while keeping the first-occurrence order, with options to ignore case, trim leading and trailing spaces, and drop empty lines along the way — then shows how many lines were removed. Data is processed only in your browser, so it is safe for sensitive lists.

How to Use

1. Paste multi-line text
2. Tick the processing options
3. Copy the deduplicated result

FAQ

Does the order change after dedupe?

No. Each line keeps the position of its first occurrence; later duplicates are removed.

Do "A" and "a" count as duplicates?

Not by default (comparison is case-sensitive); tick "ignore case" to treat them as duplicates.

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