Corvo

Text tools

Duplicate Line Remover

Remove duplicate lines from a block of text, with optional case-insensitive and whitespace-trimmed matching. Free, instant, entirely in your browser.

Runs entirely in your browser. Nothing is uploaded.

Input
Output 
Output appears here.
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What this tool does

Removes duplicate lines from a block of text or list, keeping the first occurrence of each and preserving the original order of everything that remains — useful for cleaning up an email list, a set of tags, log lines, or any list assembled from more than one source.

How to use it

  1. Paste your text or list, one entry per line.
  2. Turn on case-insensitive if "Apple" and "apple" should count as the same line.
  3. Leave trim whitespace on if a line with trailing spaces should still match an otherwise-identical line without them.
  4. Copy the cleaned result.

Questions

Is this Duplicate Line Remover free?

Yes, completely, with no signup and no limit on how much text you clean up.

Is my text uploaded anywhere?

No. Deduplication happens locally in your browser as you type — nothing is sent anywhere.

Which occurrence does it keep when it finds a duplicate?

The first one. Everything after the first occurrence of a given line is removed, so the original order of what remains is preserved.

What does "case-insensitive" actually change?

Without it, "Apple" and "apple" count as different lines. With it turned on, they're treated as duplicates of each other — useful for cleaning up a list where capitalization was inconsistent, like a list of tags or names collected from different sources.

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