Duplicate Line Remover
Remove duplicate lines from text with advanced options including case sensitivity, whitespace handling, and sorting. Perfect for cleaning lists, data processing, and text analysis.
Processing Options
Treat "Apple" and "apple" as different
Remove leading/trailing spaces
Skip blank lines in processing
Alphabetically sort unique lines
Smart Detection
Advanced duplicate detection with case sensitivity, whitespace handling, and empty line filtering options.
Detailed Statistics
Get comprehensive statistics including duplicate count, percentage, and preview of most common duplicates.
High Performance
Process thousands of lines instantly with real-time processing and optimized algorithms for large datasets.
Common Use Cases
📧 Email Lists
Clean email lists by removing duplicate addresses while preserving original order.
📊 Data Processing
Remove duplicates from CSV data, log files, and database exports efficiently.
📝 Content Lists
Deduplicate article titles, product names, and content inventories.
🏷️ Tag Management
Clean tag lists and categories by removing duplicate entries automatically.
🔗 URL Lists
Deduplicate lists of URLs, links, and web resources for SEO and analysis.
📋 General Lists
Perfect for any text lists: names, addresses, keywords, and more.
Frequently Asked Questions
How does case sensitivity work?
When enabled, "Apple" and "apple" are treated as different lines. When disabled, they're considered duplicates.
What about whitespace handling?
The tool can trim leading/trailing spaces and optionally ignore completely empty lines during processing.
Can I preserve the original order?
Yes! By default, the first occurrence of each unique line is kept in its original position. You can also sort alphabetically.
Is there a size limit?
The tool can handle thousands of lines efficiently. For extremely large files, consider breaking them into smaller chunks.