Remove Duplicate Lines
Delete repeated lines and empty lines from any list.
Clean up lists in seconds
Lists copied from spreadsheets, email exports, keyword research tools and log files often contain the same entry many times. The Remove Duplicate Lines tool keeps the first copy of every line and deletes the rest, so you end up with a clean list of unique items. It also shows how many duplicates were removed.
How to remove duplicate lines
- Paste your list into the input box with one item per line.
- Choose your options: ignore upper and lower case, trim spaces at the start and end of each line, and remove empty lines.
- Click Remove duplicates.
- Copy the cleaned list or download it as a text file.
Options explained
- Ignore case treats “Apple” and “apple” as the same line.
- Trim whitespace treats “apple” and ” apple ” as the same line, which fixes invisible differences from copy and paste.
- Remove empty lines deletes blank rows so the list is compact.
- Sort result arranges the unique lines alphabetically after cleaning.
Popular uses
Marketers use it to clean email lists and keyword lists before importing them into other software. Developers use it to find unique values in log files or configuration lists. Teachers and office workers use it to merge name lists from several sources without repeating anyone. Because the tool keeps the original order by default, you can trust the result to look like your source list without the repeats.
The processing happens on your own device, so even private customer lists or internal data never leave your computer. It handles tens of thousands of lines instantly.
Frequently asked questions
Does the tool keep the original order?
Yes. The first time each line appears is kept in its original position, and later copies are removed. You can also choose to sort the result.
How many lines can it handle?
It comfortably handles more than 100,000 lines because the work is done locally by your browser.
Can I see how many duplicates were removed?
Yes. After cleaning, the tool shows the original line count, the number of unique lines and how many were removed.