Remove Duplicate Lines

Remove duplicate lines while keeping the first occurrence. Perfect for cleaning logs, lists, and text snippets—everything runs locally.

Total Lines 0
Unique Lines 0
Removed 0

How it works

First occurrence kept: The first time a line appears is preserved; subsequent duplicates are removed.
Order preserved: Original line order is maintained while removing duplicates.
Whitespace respected: Lines are compared exactly as-is (no trimming or case changes).
100% local: All processing runs in your browser—no data is sent anywhere.

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