Remove Duplicate Lines

Remove duplicate lines from a block of text with optional case-insensitive matching.

How to Use

  1. 1 Paste your text into the input area.
  2. 2 Choose whether to ignore case when comparing lines.
  3. 3 Click "Remove Duplicates".
  4. 4 Copy the deduplicated text.

Features

Line deduplication

Removes repeated lines, keeping the first occurrence.

Case-insensitive option

Optionally treat lines as equal regardless of case.

Count display

Shows how many duplicates were removed.

Privacy

Your text never leaves your browser. Nothing is uploaded or stored.

This tool processes files or input locally in your browser.

Frequently Asked Questions

Does it preserve line order?

Yes, the first occurrence of each line is kept in its original position.

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