Remove Duplicate Lines
Deduplicate, sort and clean line lists.
100% Client-Side · In-Memory Only
Interactive Tool Workspace
Loading Remove Duplicate Lines...
How to Use Remove Duplicate Lines
- Paste a line-separated list of items, URLs, or emails.
- Toggle options like case sensitivity, whitespace trimming, and empty line removal.
- Choose your sorting order (original order, alphabetical A-Z, or reverse Z-A).
- Click "Remove duplicates" and copy your clean unique list.
Features & Guarantees
- Fast O(N) deduplication using Javascript Set data structures.
- Displays the exact count of unique lines kept and duplicates stripped.
Frequently Asked Questions
Can it deduplicate regardless of capitalization?
Yes. Check "Ignore case" to treat "Apple" and "apple" as duplicates.