Writing Tools
Remove Duplicate Lines
Remove duplicate lines online — fast, easy, and 100% free. Paste any list of names, emails, or entries and get back only the unique lines, kept in their original order, with an optional case-sensitive toggle.
- Preserves original line order
- Case-sensitive toggle
- Instant in-browser cleanup
Frequently asked questions
How do I remove duplicate lines from a list?
Paste your multi-line text in. The tool strips out repeated lines instantly while keeping the remaining ones in their original order.
Can it tell the difference between uppercase and lowercase duplicates?
Yes, a case-sensitivity toggle lets you choose whether 'Apple' and 'apple' count as duplicates.
Are blank lines treated as duplicates too?
Yes, repeated blank lines are removed the same as any other duplicate line, keeping just one.
Is there a limit on how many lines I can paste in?
No, paste a short list or thousands of lines and duplicates are removed instantly either way.
Does removing duplicates change the order of the remaining lines?
No, remaining lines keep their original order — only the repeated ones are dropped.
Can I use this to clean up a list of emails or names?
Yes, it works well for any line-based list, including emails, names, or usernames.