What counts as a duplicate line?

Two lines are duplicates if they are identical after applying your options (trim whitespace, ignore case). The first occurrence is kept; subsequent ones are removed.

Does it preserve the original order?

Yes, by default. Enable "Sort lines" to alphabetically sort the unique results instead.

What does "Trim whitespace" do?

It strips leading and trailing spaces from each line before comparison, so " hello " and "hello" are treated as the same line.

Remove Duplicate Lines

Text Tools· 20 tools

Free online duplicate line remover. Paste your text and instantly remove all duplicate lines. Options to sort lines, trim whitespace, and ignore case. Great for cleaning up lists, CSV data, log files, and more.

Trim whitespace

Ignore case

Sort lines

Input

Output

Frequently Asked Questions

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