Remove Duplicate Lines
Clean up your text by removing duplicate lines instantly with advanced options
Remove Duplicate Lines Tool
Total Lines: 0
Example Text Lists
Deduplication Examples
Case Sensitive Deduplication:
Input:
Apple
apple
APPLE
Banana
apple
apple
APPLE
Banana
apple
Output:
Apple
apple
APPLE
Banana
apple
APPLE
Banana
Case Insensitive Deduplication:
Input:
Apple
apple
APPLE
Banana
apple
apple
APPLE
Banana
apple
Output:
Apple
Banana
Banana
Whitespace Trimming:
Input:
" Apple "
"Apple"
" Apple"
" Apple"
"Apple"
" Apple"
" Apple"
Output (with trimming):
Apple
Tool Features
✨ Key Features:
- • Case-sensitive and insensitive duplicate detection
- • Whitespace trimming before comparison
- • Preserve original line order
- • Real-time statistics and feedback
- • Handle large text files efficiently
- • One-click copy to clipboard
🔧 Use Cases:
- • Clean CSV and Excel data
- • Remove duplicate email addresses
- • Deduplicate customer lists
- • Clean log files and output
- • Organize inventory and product lists
- • Process scraped web data
How to Remove Duplicates
1
Paste Your Text
Enter or paste text with duplicate lines
2
Configure Options
Choose case sensitivity and whitespace settings
3
Get Clean Results
Copy the deduplicated text with unique lines only
Deduplication Features
🎯 Smart Detection
- • Case-sensitive duplicate detection
- • Case-insensitive matching option
- • Whitespace trimming before comparison
- • Preserve original line order
- • Handle empty lines intelligently
📊 Detailed Statistics
- • Show total lines processed
- • Count unique lines found
- • Display duplicate lines removed
- • Calculate deduplication percentage
- • Real-time processing feedback
When to Use Duplicate Remover
📋 Data Cleaning
- • Clean CSV and Excel data
- • Remove duplicate email addresses
- • Deduplicate customer lists
- • Clean survey responses
- • Organize inventory lists
💻 Programming & Development
- • Clean log files and output
- • Remove duplicate URLs
- • Deduplicate configuration entries
- • Clean test data sets
- • Process scraped data
Deduplication Examples
Email List Cleaning:
Before:
john@example.com
jane@example.com
john@example.com
admin@example.com
jane@example.com
jane@example.com
john@example.com
admin@example.com
jane@example.com
After:
john@example.com
jane@example.com
admin@example.com
jane@example.com
admin@example.com
Product List Deduplication:
Before:
Laptop
Mouse
Keyboard
laptop
Monitor
Mouse
Mouse
Keyboard
laptop
Monitor
Mouse
After (Case Insensitive):
Laptop
Mouse
Keyboard
Monitor
Mouse
Keyboard
Monitor