linesdedupe Free · private · in your browser

Paste · dedupe · done

Dedupe a List Online

Paste any list — names, URLs, keywords, IDs, log lines — and dedupe it in a click. The list deduplicator is free, private and runs entirely in your browser.

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 dedupe a list online

  1. Copy your list (one entry per line) into the input panel.
  2. Choose how strict the match should be: ignore case, trim surrounding spaces, drop empty lines.
  3. Copy the clean list back into your spreadsheet, CMS or email tool.

Works with any plain-text list

Because the tool compares raw lines, it does not care what the list contains. Common cases: newsletter subscriber lists, product SKUs, tag lists, redirect URL lists, crawl dumps and exported analytics rows.

Keep first or keep last?

Keep first is safest for lists where the first occurrence carries the best data. Keep last is useful when you merge an older list into a newer one and want the latest copy to win.

See also: unique lines only · dedupe an email list · compare two lists