✂️ Line Deduplicator

Remove duplicate lines, optionally keeping order.

Input

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How it works

How it works

  • Splits on newlines, optionally trims, skips empties, and keeps the first occurrence of each line (stable).
  • Membership tracking uses a Set for O(1) lookups; overall complexity ~O(n).
  • Case/whitespace sensitivity depends on your options; sorting is not performed.
Privacy & Security

All processing local.

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Accuracy, Limits & Tips

Large lists limited by memory.

Examples
  • Clean word lists.
  • Remove duplicate emails.

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