Remove duplicate lines

Leaves each line once: the first copy stays where it was, the repeats go. For e-mail lists, keywords, logs.

In
lines
Out
lines
Options
Input · lines
Output · lines

Waiting for input

Runs in this tab. The text is not sent anywhere.

Related

Questions

Do "Anna" and "anna" count as the same line?

Only with "Ignore case" on. Spaces at the ends are trimmed first, so "anna " and "anna" are the same line.

Can I also sort the result?

Yes — in "Sort and clean lines", where repeats, empty lines and sorting are all options.

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