Free Online Remove Duplicate Lines
Typical use: pasting an email or phone list from a spreadsheet and ending up with one clean column ready to import.
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How to use Remove Duplicate Lines
- Paste the list.
- Tick the clean-up options you need.
- Check how many lines were removed.
- Copy or download the result.
Questions about Remove Duplicate Lines
Is a line with a trailing space treated as unique?
Only when Trim spaces is off; turn it on to catch invisible differences.
Can I keep the duplicates visible?
Yes, run Count duplicates to see each line with its occurrence number first.
About Remove Duplicate Lines
Remove duplicate lines from a list with our free online Remove Duplicate Lines. 100% browser-based, fast, and private—no login or file uploads required.
These text and code tools clean and transform strings: count words, convert case, deduplicate lines, encode or decode Base64 and URLs, escape entities, hash, format JSON and compare two versions.
This tool runs in your browser. The file is not uploaded. Everything runs on the text you paste, so you can safely process snippets of code or logs; nothing is sent anywhere, and clearing the box removes it from memory.