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Remove Duplicate Lines

Paste a list and get every unique line back, with a count of what was removed. It can ignore capitals and stray spaces, which is what usually hides duplicates in keyword and email lists.

Built and maintained by Nouman Sabir AI search & SEO specialist Updated October 2026

  • 100% free
  • No sign-up
  • Runs in your browser, nothing is stored

Keywords, emails, URLs, product SKUs: anything one per line.

Unique lines · 3 duplicates removed from 7 lines

plumber austin
emergency plumber austin
water heater repair austin

Processed in your browser, so private lists never leave your computer.

Your inputs are saved in this browser only, so they're here when you come back.

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Reviewed by Nouman Sabir
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How to use the Remove Duplicate Lines

  1. 1

    Paste your list with one item per line.

  2. 2

    Choose whether to ignore capitals, trim spaces, remove empty lines and sort.

  3. 3

    Copy the unique lines. The count shows how many duplicates were removed.

Clean up keyword research

Exports from Search Console, Google Ads and keyword tools overlap heavily. Paste them together, remove duplicates with capitals ignored and you have one clean list to group by topic and intent, ready to map to pages.

Other lists worth deduplicating

Anything you upload elsewhere is cleaner without duplicates, and some tools charge per row.

  • Email lists before an import, to avoid double sends
  • URL lists for redirects, sitemaps or disavow files
  • Product SKUs and inventory exports
  • Citation and directory lists for local SEO

Frequently asked questions

How do I remove duplicate lines from a list?

Paste the list here with one item per line. Duplicates are removed instantly and you can copy the unique lines.

Does it keep the original order?

Yes, by default it keeps the first time each line appears. You can also sort A to Z or Z to A.

Can it ignore capital letters?

Yes. With ignore capitals on, "Plumber Austin" and "plumber austin" count as the same line.

Is there a size limit?

It handles tens of thousands of lines in most browsers, because nothing is uploaded.

Is my list stored?

No. It's processed in your browser, so private lists never leave your computer.

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