To remove duplicate lines, paste your list into the Duplicate Line Remover, choose whether matching should ignore case and surrounding spaces, and copy the de-duplicated list. The tool also reports how many duplicates it removed.
Follow along with the free Duplicate Line Remover, which runs in your browser, or browse more tools in this category.
How to use the Duplicate Line Remover
- Paste your list with one item per line.
- Choose options: ignore letter case and trim whitespace if you want near-matches treated as duplicates.
- Read the removed-count to confirm how many duplicates were found.
- Copy the unique list.
Worked example
The list Apple, apple, Banana, Apple becomes Apple, Banana when case is ignored, with 2 duplicates removed. With case-sensitive matching, “apple” would stay.
Tips and common mistakes
- The first occurrence of each line is kept, so the original order is preserved.
- Trim whitespace first if your list has trailing spaces, since “cat” and “cat ” would otherwise differ.
- Use Sort Lines afterward if you also want the list alphabetized.
Frequently asked questions
Which copy is kept?
The first occurrence of each line stays and later repeats are removed.
Can it ignore capital letters?
Yes. Turn on the case-insensitive option.
Does it handle large lists?
Yes, within what your browser can handle comfortably, since everything runs locally.