Alternately, if you move files back and forth a lot, you might not want to convert them, but rather to do :set ff=dos, so vim will know it's a DOS file and use DOS conventions for line endings.

Here is a tutorial to convert CSV to XLS or XLSX using the command-line interface in Windows 11/10. There are multiple ways to convert a CSV file to Excel formats (XLS, XLSX). You can use ...