Duplicate Line Remover
Keep the first occurrence of each line while preserving the original order.
Free browser tool
No Matrix computer needed
✓ No account or card
✓ Use the result right away
✓ Task-specific limits below
Workspace
Use duplicate line remover
Runs in this browser tab
Result
How to use it
Paste one item per line to remove exact duplicate lines from a list.
Try this example
alpha beta alpha
What to check
Whitespace and letter case are significant; near-duplicates remain separate.
Review the result before using it in a published page, application, or agent configuration.
Quick answers
Frequently asked questions
Does duplicate removal change the original order?
No. It keeps the first instance of each exact line and removes later copies while preserving the order of retained lines.
Are lines with different case or spaces duplicates?
No. Comparison is exact, so case and whitespace matter. Clean or normalize the text first if near-duplicates should match.
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