Remove Duplicate Lines

Pasting the same data twice is one of the fastest ways to mess up a spreadsheet, a keyword list, or an email export. This free tool lets you remove duplicate lines from any block of text in one click, so every entry shows up exactly once. Drop in a messy list, choose your options, and copy a clean version back out.

When you remove duplicate lines, you can also tidy up the surrounding noise. Toggle case-insensitive matching so "Pizza" and "pizza" count as the same line, trim extra spaces and tabs from each row, drop blank lines, and optionally sort the result A to Z. The counts panel shows how many lines you kept and how many duplicates were removed, so you always know what changed.

Local marketers use this constantly: deduping service-area lists, keyword variations, GBP categories, citation URLs, and customer email exports before importing them anywhere. Build a clean keyword and location list here, then track where your business ranks across the map with ProMapRanker, start free.

FAQ

Does this tool keep the original order of my lines?

Yes. By default the first time a line appears is the version that is kept, and the order of those first appearances is preserved. If you would rather have an alphabetized result, tick the "Sort A to Z" box and the kept lines are reordered after the duplicates are removed.

Will it treat uppercase and lowercase as different lines?

That is up to you. With the "Case-insensitive" box off, "Apple" and "apple" are treated as two separate lines. Turn it on and they are treated as the same line, so only the first one survives. The text you keep still uses the original capitalization of that first occurrence.

Is my list sent to a server?

No. Everything runs in your browser with plain JavaScript. Nothing you paste is uploaded, logged, or stored, which makes it safe for customer emails, internal lists, and any data you would rather not send anywhere.