Duplicate Line Remover
Remove duplicate lines from text instantly. Sort lines, strip blank lines, trim whitespace, and keep only unique entries. Free and instant.
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Frequently asked
questions
In case-insensitive mode, "Apple", "APPLE", and "apple" are treated as the same line and deduplicated. The first occurrence (in its original casing) is kept. In case-sensitive mode (default), all three would be kept as different lines.
Yes — paste email addresses or CSV rows one per line, and the tool will remove duplicates. For CSV, paste just the column you want to deduplicate.
Sort by frequency shows the most repeated lines first. This is useful for finding which items appear most often in a list before deduplication.