Remove Duplicate Lines

Free online remove duplicate lines tool to clean text while preserving original line order.

  • Runs locally in your browser
  • No data uploaded
  • Instant processing
Waiting for input

How to Use Remove Duplicate Lines

  1. Paste or type text containing duplicate lines into the input panel.
  2. Unique lines appear instantly in the output panel, preserving original order.
  3. Click Copy to copy the deduplicated text to your clipboard.

Example Usage

Input

apple
banana
apple
cherry
banana

Output

apple
banana
cherry

Frequently Asked Questions

Does it preserve the original line order?
Yes. The first occurrence of each line is kept and subsequent duplicates are removed.
Is the comparison case-sensitive?
Yes. Lines must match exactly, including casing and whitespace, to be considered duplicates.
Is there a size limit?
There is no hard limit. Processing happens in your browser, so performance depends on your device.