Is it case-sensitive?
Yes — 'Apple' and 'apple' are treated as different lines. Use the Smart Case Converter first if you need case-insensitive dedup.
Remove Duplicate Lines
Dedupe lists, logs, or CSV rows while preserving first-seen order.
✓Key Features
- Removes exact duplicate lines (case-sensitive)
- Preserves first-seen order
- Handles lists of any size — thousands of lines in milliseconds
- No trimming: blank lines are kept unless duplicated
★Benefits
- Clean up email lists, CSV exports, or log dumps
- Dedupe URL lists before batch processing
- Speed up import-to-database workflows
- Sanity-check that your data is unique
How to use this tool
1
Paste your list, one item per line
2
Click Process
3
Copy the deduplicated list