Remove Duplicate Lines

Paste a list and remove repeated lines, keeping the first occurrence and the original order. Optional case-insensitive matching.

100% freeNo sign-upRuns in your browserNo upload · data stays private

📖 Read the full Remove Duplicate Lines guide — how it works, examples & FAQ →

How to use this tool

  1. Paste your list, one item per line.
  2. Toggle case-insensitive if needed.
  3. Copy the de-duplicated list.

Example

apple / banana / apple → apple / banana

Why it's private

This tool runs entirely in your browser using JavaScript. Whatever you paste is processed on your own device — it is never uploaded to a server, logged, or stored. Built by Calabi, which also strips AI metadata and C2PA signals from images and video.

Related tools