How to use the Remove Duplicate Lines
- Paste your list, one item per line.
- Choose options: ignore case, trim spaces, remove empty lines, sort.
- The cleaned list appears instantly with a count of removed duplicates.
- Copy or download it.
Frequently asked questions
Does it keep the original order?
Yes, unless you tick Sort. The first occurrence of each line is kept.
Can I remove duplicates from an Excel column?
Copy the column, paste it here, clean it, and paste it back.
How many lines can it handle?
Hundreds of thousands. Everything runs in your browser.
Does it remove duplicate words inside a line?
No, it compares whole lines. Use the Word Counter to find repeated words.
Is my data private?
Yes. Your list is never uploaded.
Written and tested by MasterKit Online Editorial Team
Our team builds and tests every tool by hand, checks each formula against official sources (IRS, HMRC, the Income Tax Department of India, CBSE, NHS, WHO) and reviews pages whenever rules change. Last reviewed on . Spotted a mistake? Tell us.