Duplicates removed: 0

What is Remove Duplicate Lines?

Remove duplicate lines keeping the first occurrence. Optional case-insensitive matching.

How to Use

  1. Paste one item per line.
  2. Enable ignore case if needed.
  3. Copy the deduplicated output.

Frequently Asked Questions

Which line is kept?

The first occurrence of each unique line.

Related Tools

See Remove Empty Lines and Sort Lines.