Text Tools
Remove Duplicate Lines
Clean any list by removing duplicate lines — with ignore-case, trim and empty-line options.
About this tool
Email lists, keyword lists, exported data — they all accumulate duplicates. Paste your list, choose whether to ignore case and trim whitespace, and get the cleaned list plus a count of what was removed.
Order is preserved (the first occurrence wins), which matters for ranked lists. Runs entirely in your browser, so customer emails and private data stay on your device.
How to use
- Paste your list, one item per line.
- Set the options (ignore case, trim, drop empty lines).
- Click Remove duplicates and copy the clean list.
Frequently asked questions
Yes — the first occurrence of each line is kept in place; later repeats are dropped.
It treats Apple, APPLE and apple as the same line, keeping only the first form encountered.
No. Deduplication runs in your browser — nothing is sent to any server.