Is the comparison case-sensitive?

By default yes. Toggle case-insensitive mode to treat 'Hello' and 'hello' as duplicates.

Are blank lines removed?

Toggle the 'Remove blank lines' option to strip empty lines.

Is the original order preserved?

Yes. The first occurrence of each line is kept in its original position.

Remove Duplicate Lines

Remove duplicate lines from text instantly. Keep unique lines only. Free online tool.

Case-sensitiveTrim whitespaceRemove blank lines

Frequently asked questions

Remove Duplicate Lines — Deduplicate Text Online Free

Paste text and remove duplicate lines instantly. Keeps the first occurrence, preserves original order. Useful for cleaning up lists, log files, and data.

Preserves order

First occurrence stays in place.

Case options

Case-sensitive or insensitive matching.

Stats

Shows how many duplicates were removed.