How duplicates are identified
Exact mode compares every character. Ignore-case mode treats Apple and apple as the same value but preserves the spelling of the first occurrence.
Order and blank lines
The result is not sorted: unique lines remain in their original order. A blank line is also a value, so repeated blank lines are removed.
Local processing
The list is cleaned in the current tab’s memory and is not sent to the server.
Frequently asked questions
Are leading and trailing spaces removed?
No. Whitespace is preserved and participates in comparison, so differently indented lines remain distinct.
Which duplicate version is kept?
The first occurrence is always kept, including its original case and whitespace.