Remove duplicate rows
Remove duplicate rows from CSV files and clean your data
Exact row matches are identified as duplicates. If all values in a row match a previous row exactly, it's marked as a duplicate.
When duplicates are found, the first occurrence is kept. All subsequent duplicate rows are marked for removal.
Yes, the tool highlights duplicate rows in red before removal. You can review them and then download the cleaned data.
No, header rows are always preserved and never treated as data duplicates.
Yes, the tool doesn't modify your original file. You download a new cleaned version, leaving your source data untouched.
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