local-only

Remove Duplicate Lines

Deduplicate, sort and clean line lists.

🔒 local memory only
Initializing Remove Duplicate Lines in local browser environment…

How to use Remove Duplicate Lines

  1. Paste a line-separated list of items, URLs, or emails.
  2. Toggle options like case sensitivity, whitespace trimming, and empty line removal.
  3. Choose your sorting order (original order, alphabetical A-Z, or reverse Z-A).
  4. Click "Remove duplicates" and copy your clean unique list.

Why use this local-first tool?

  • 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.

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