Duplicate Line Remover

Remove duplicate lines from text

100% Client-Side Only (No Server Tracking)

Options

Case Sensitive

Keep First Occurrence

Original Lines

Unique Lines

Duplicates Removed

Input

Output

How to Use Duplicate Remover?

Paste your raw data into the input box.

Toggle 'Case Sensitive' if you want 'Apple' and 'apple' treated as different.

Choose whether to keep the 'First Occurred' or 'Last Occurred' line.

View the summary of lines removed and copy the unique result.

Duplicate Remover Features

Smart case sensitivity toggle.
Occurrence management (Keep First vs Last).
Real-time statistics (Original vs Unique vs Removed).
One-click result copying.

Private Data Cleaning

All duplicate detection happens locally in your browser. Your sensitive lists are never uploaded.

Frequently Asked Questions

'Keep First' retains the first time a duplicate appears and deletes subsequent ones. 'Keep Last' does the opposite, keeping the newest entry.

The tool treats exact matches of lines. If lines have different leading or trailing spaces, they will be considered unique unless you trim them first.

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