About the CSV Duplicate Row Remover
Remove repeated data rows from a CSV table without modifying the original local file. The header row is kept, and the first occurrence of each unique row remains.
Formula or method
Each parsed row is compared to previously seen rows using its full sequence of cell values. Only exact repeated rows are removed; row order is preserved.
Worked example
Name,Department followed by Ava,Sales; Kai,Design; Ava,Sales becomes a header and two data rows after removing the repeated Ava,Sales entry.
How to use the tool
Start with the example values above, then replace each input with your own figures. The results update immediately. Review the units, denominators, and assumptions before using any number in an important decision.
Assumptions and limitations
This is exact-row matching, not fuzzy deduplication. A trailing space, different case or changed value means two rows are considered different. Review before using in important financial or accounting workflows.
Frequently asked questions
Can I remove duplicates based on only one column?
Not in the first version. The tool compares entire rows, preserving every distinct combination of values.
Privacy and support
Your inputs are processed locally in your browser. ToolMosaic does not upload or store the values you enter in this tool. Our tools are free, and we appreciate your support.