Copied to clipboard!
Remove Duplicate Lines
Remove duplicate lines from text. Choose case sensitivity, which occurrence to keep, and whether to trim whitespace. Optionally view a list of all duplicates found. 100% client-side.
Input
Drop a text file here or click to upload
Options
Deduplication Options
Options
Output
Duplicates Found
Statistics
Input lines: 0 | Output lines: 0 | Removed: 0
How to Use Remove Duplicate Lines
1. Paste Lines
Enter or paste text with one item per line into the input area.
2. Configure
Choose case handling, which occurrence to keep, and optional whitespace trimming.
3. Deduplicate
Click Remove Duplicates to get unique lines and see what was removed.
Common Use Cases
📧 Email list deduplication
📋 Data cleanup & ETL
🔗 URL list deduplication
📁 File path deduplication
🏷️ Tag & keyword cleanup
📊 CSV data processing