Remove Duplicate Lines
Remove duplicate lines from a list while preserving order.
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What is a Remove Duplicate Lines?
This tool removes duplicate lines from a block of text.
How to Use This Remove Duplicate Lines
- Paste your list.
- Choose whether to ignore case or trim whitespace.
- Click Remove Duplicates.
- Copy the cleaned list.
How It Works
The tool splits the input into lines, tracks seen lines, and outputs only the first occurrence of each.
Example Calculation
"apple\nbanana\napple\ncherry" becomes "apple\nbanana\ncherry".
Frequently Asked Questions
Is the original order preserved?
Yes, the first occurrence of each line is kept in its original position.
Privacy & Data Processing
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Last updated: 2026-10-01