Remove Duplicate Lines
Remove duplicate lines from your text instantly. Perfect for cleaning up data lists, removing repeated entries, and deduplicating content.
💡 How to Use This Tool
Remove duplicate lines from your text quickly and easily. Follow these simple steps:
Paste Your Text
Enter or paste text with duplicate lines into the input field.
Configure Options
Choose case sensitivity, whitespace handling, and empty line settings.
Remove Duplicates
Click the button to instantly remove all duplicate lines.
Copy Your Result
Click Copy to copy the deduplicated text to your clipboard.
📖 About Remove Duplicate Lines
What is a Duplicate Line Remover?
A duplicate line remover is a tool that scans through text and removes any lines that appear more than once, keeping only unique entries. It's essential for data cleanup and list management.
Common Use Cases
- Data Cleanup: Remove repeated entries from exported data or logs
- Email Lists: Deduplicate email addresses before sending campaigns
- Code Cleanup: Remove duplicate import statements or configuration lines
- Content Editing: Clean up repeated paragraphs or sentences in documents
- Database Preparation: Prepare clean data for import by removing duplicates
Key Features
Case Sensitivity
Choose whether "Apple" and "apple" should be treated as duplicates or unique entries.
Whitespace Handling
Optionally trim leading and trailing whitespace before comparing lines for more accurate duplicate detection.
Order Preservation
Keep lines in their original order while removing duplicates, or sort the result alphabetically.
Empty Line Handling
Skip empty lines during processing to keep your output clean.
Privacy & Security
This tool runs entirely in your browser using JavaScript. No text is sent to any server—your content stays completely private and secure on your device.