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Remove Duplicate Lines
Remove duplicate lines from text while preserving the original order. Perfect for cleaning up lists and data.
No uploads • Client-side only • Your data stays on your device
Options
How It Works:
- Compares each line with all others to find duplicates
- Keeps the first occurrence of each unique line
- Maintains original order (unless sort option is enabled)
- Empty lines are preserved as single occurrence
Common Use Cases:
- Clean up email lists and contact databases
- Remove duplicate entries from CSV data
- Deduplicate keywords and tags
- Clean up log files and lists
- Prepare data for import/export
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Your Privacy Guaranteed
All processing happens directly in your browser using JavaScript. Your files, passwords, and data never leave your device and are never uploaded to our servers. We cannot see, store, or access anything you process with this tool.
No account required • No tracking • No data collection • Works offline after initial load