Remove Duplicate Lines
Delete duplicate lines from a list, with sorting and trimming.
About the Remove Duplicate Lines
Remove Duplicate Lines cleans up any list by keeping only the first occurrence of each line. Optionally trim surrounding whitespace, ignore case when comparing, and sort the result alphabetically. It is perfect for tidying email lists, keyword lists, log lines, CSV columns and any pasted data — and because it works entirely in your browser, even sensitive lists never leave your computer.
How to use it
- Paste your lines into the top box, one item per line.
- Choose your options: trim whitespace, ignore case, and/or sort A–Z.
- Click 'Remove duplicates' and copy the clean, de-duplicated result.
Frequently asked questions
Does it keep the original order?
Yes by default — it keeps the first time each line appears. Tick 'Sort A→Z' if you would rather have the output sorted alphabetically.
What does 'ignore case' do?
With it on, 'Apple' and 'apple' count as the same line, so only one is kept. With it off, they are treated as different.
Is my data uploaded?
No. All de-duplication happens locally in your browser. Nothing is sent to a server.
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