Remove duplicate lines from text instantly. Clean up lists, CSV data, logs, and more with one click.
Paste your list into the box, choose options like “Case Sensitive”, “Trim Whitespace”, “Remove Empty Lines” and “Sort Result”, then click “Remove Duplicates”. The cleaned list appears instantly and keeps the first occurrence of each line.
Handy for deduplicating email lists, keyword lists, CSV extracts or inventory names. Enable “Sort Result” if you want an alphabetized list; leave it off to preserve the original order — useful when order matters, like ranked product IDs.
For very large lists (10,000+ lines), paste in chunks to avoid slowing down your browser. After removal, scan the output once for near-duplicates like trailing punctuation or inconsistent capitalization - the trim option catches most of those automatically.
Combine this tool with the Case Converter: run lowercase first, deduplicate, then restore the casing you want. That two-step workflow catches duplicates that differ only by capitalization - the most common source of messy lists.
This free online duplicate line remover cleans up text by removing repeated lines. Paste any text with duplicate entries, choose your options, and get clean, unique results instantly. Perfect for cleaning up email lists, log files, CSV data, keyword lists, and more.
A line is considered duplicate if it matches another line exactly (or case-insensitively if that option is on). The first occurrence is kept, and all subsequent matches are removed.
Yes. Paste CSV data and it will deduplicate entire lines. For column-specific deduplication, you'd need a dedicated tool.
We recommend copying your original text before deduplicating if you might need it back. There's no undo, but you can re-paste.
No. All processing happens entirely in your browser. Your data never leaves your device.