CSV to Excel Converter

Convert a CSV file into a real .xlsx workbook, useful when a tool insists on an Excel file and won't accept plain CSV.

Common questions

Does this just rename the file, or actually convert it?
It actually rebuilds the data as a genuine Excel workbook, not a renamed text file, so formulas, sorting, and formatting in Excel all work normally afterward.
Will number formatting be preserved?
Numeric values are written as numbers rather than text, so Excel treats them correctly for sums and sorting, though custom formatting like currency symbols isn't guessed automatically.

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