Duplicate Line Remover

Strip duplicate lines from any list of text. Optionally sort and trim.

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3 duplicates removed
Output (3 unique lines)
apple
banana
cherry

What this does

Duplicate Line Remover strips repeated lines from any list of text, keeping only the first occurrence of each line. Optional case-sensitivity, whitespace trimming, and sort.

When to use it

  • Cleaning up an email list with duplicates
  • Deduplicating a list of URLs scraped from a webpage
  • Removing repeat lines from a log file
  • Consolidating two merged lists into a unique set

Frequently asked

Does it preserve order?

Yes — the first time a line appears, it's kept. Subsequent duplicates are removed. Enable 'Sort A → Z' if you want output in alphabetical order instead.

Are blank lines counted as duplicates?

Yes — all but the first blank line are removed. Toggle 'Trim whitespace' off if you want to keep them.