Remove Duplicate Lines
Clean lists by removing duplicate entries. Privacy-first processing.
📖 How It Works
This tool scans through your text line by line and removes any duplicate entries, keeping only the first occurrence of each unique line. Perfect for cleaning up:
- Email lists from CSV exports
- Product codes or SKUs
- URLs and links
- Database records
- Log files and data exports
🔒 Privacy Guaranteed: Your data is processed entirely in your browser. Nothing is sent to any server. This makes it safe for sensitive business data, customer emails, and confidential information.
❓ Frequently Asked Questions
When enabled, "Apple" and "apple" are treated as different items. When disabled, they're considered duplicates and only one is kept.
There's no hard limit, but processing very large files (over 100,000 lines) may take a few seconds. The tool handles most use cases instantly.