Duplicate Line Remover
Paste any list and get it back with duplicate lines removed — optionally ignoring case, trimming stray spaces, and sorting the result alphabetically.
How to remove duplicate lines
- Paste your list — one item per line.
- Choose whether to ignore case, trim spaces, or sort the result.
- Tap Remove duplicates and copy the cleaned list.
Frequently asked questions
Which copy of a duplicate is kept?
The first one, in its original form. With “Ignore case” on, “Apple” and “apple” count as the same line and whichever appeared first is kept.
What does “Trim spaces” do?
It strips spaces from the start and end of every line before comparing, so “item ” and “item” are treated as the same. It's on by default because invisible trailing spaces are the most common reason duplicates seem to “survive”.
Does my list leave the browser?
No — everything runs on your device. Nothing is uploaded, logged or stored.