Free Remove Duplicate Lines Online
Remove duplicate lines from any list in seconds with our free remove duplicate lines tool. Paste your list, click one button, and every repeated line is gone — the order of the first appearance stays exactly the same. Free, no signup, no install.
About the Free Remove Duplicate Lines Tool
Lists pick up duplicates fast: keyword lists, email lists, names copied from spreadsheets or log files. Cleaning them by hand is slow and you miss repeats. This tool checks every line and keeps only the first time each one appears, so the cleaned list keeps its original order and nothing else is changed.
You can ignore case so "Apple" and "apple" count as the same line, and you can drop blank lines at the same time. Your text is processed in your browser, so lists with private data never leave your device.
How to Use the Remove Duplicate Lines Tool
- Paste your list into the box, one item per line.
- Tick "Ignore case" or "Remove empty lines" if you need them, then click "Remove Duplicates".
- Copy the cleaned list from the result box, or Clear to start again.
Frequently Asked Questions
Does the tool keep the original order?
Yes. Only the first appearance of each line is kept, in the same order it appeared. Later repeats are removed.
What does "Ignore case" do?
It treats lines that differ only in capitals as the same line. With it on, "Apple" and "apple" count as duplicates and only the first one is kept.
Are blank lines removed too?
Yes, if "Remove empty lines" is ticked. Unticking it keeps blank lines in your list.
Is my list uploaded anywhere?
No. The tool runs entirely in your browser. Your list is never sent to a server or stored.
Related Tools
Text Sorter · Case Converter · Word Counter · Find and Replace