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Remove Duplicate Lines
Keep the first copy of each line and remove repeats.
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List CleanupPrivacy Notice：Your files are processed locally. They are never uploaded.
How it works
- Paste content where each record is on its own line.
- Optionally ignore case, then run the tool.
- The result keeps the first occurrence of each line.
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FAQ
Will line order change?
No. The first occurrence order is preserved.
Are blank lines included?
Yes. Repeated blank lines are treated as duplicates too.