linesdedupe Free · private · in your browser

Paste · dedupe · done

Remove Duplicate Lines Online

Drop a list in, get clean unique lines out. This online duplicate line remover runs 100% in your browser, so nothing is uploaded to a server.

Remove Duplicate Lines

on-device
Options

Input

Output

Paste on the left and the clean list shows up here — instantly.

⌘/Ctrl + Enter dedupe & copy · Esc leaves the box · / jumps in

0 in → 0 unique · 0 removed

nothing leaves your device

How to remove duplicate lines online

  1. Paste your text into the input box — one item per line.
  2. Pick your options: ignore case, trim spaces, remove blank lines, keep the first or last copy.
  3. Copy the deduplicated result or download it as a .txt file.

Why use an online line deduper?

Spreadsheets break on long text, messy CSVs and pasted logs. An online tool is faster: paste, read the live counter, and you are done. Because the work happens locally in JavaScript, private lists such as customer emails or internal logs never leave your device.

FAQ

Is the tool free?

Yes. No account, no trial, no upload limit.

Does it work on mobile?

Yes — the layout stacks input and output on small screens.

More: keep unique lines only · dedupe a list · remove duplicate emails · home