How to use Remove Duplicate Lines
- Type or paste your text into the box above.
- Choose the options you need – the result updates instantly.
- Copy the result or download it as a .txt file.
How to remove duplicate lines
Paste your list or text into the left box, one item per line. Duplicate lines are removed instantly and the unique lines appear on the right. The counter shows how many duplicates were deleted.
How are duplicates found?
Every line is compared with the lines above it. When a line already appeared, it is removed. The order of your list does not change, so the first copy of each line stays where it was. The counter also helps you find duplicate lines of text: it shows how many were removed.
Ignore case and spaces
With “Ignore upper/lower case” on, “Apple” and “apple” count as the same line. “Ignore spaces at start and end” treats “apple” and “apple ” as duplicates too – useful for lists copied from spreadsheets.
Remove empty lines too
Keep “Remove empty lines” switched on to delete empty lines at the same time, so you get a clean list with only unique lines.
Popular uses
Use this duplicate line remover to clean up email lists, keyword lists, product codes and names before importing them, or find out how many unique items a list contains.
Private by design
Every tool runs inside your browser on your own device. Your text is never sent to a server, so it cannot be seen, stored or shared by anyone.
Frequently asked questions
How do I delete duplicate lines?
Paste your text with one item per line. You can delete duplicate lines online in seconds – copy or download the result.
Which copy is kept?
The first time a line appears is kept, and later copies are removed. The order stays the same.
Can I remove blank lines too?
Yes. “Remove empty lines” is switched on by default, so blank lines are deleted together with the duplicates.
Can I also sort the list?
Yes. After removing duplicates, copy the result into the Alphabetical Order tool to sort it from A to Z.
Is my list uploaded?
No. Everything is processed in your browser.