There are multiple ways to convert a CSV file to Excel formats (XLS, XLSX). You can use Microsoft Excel, a dedicated converter freeware, or an online tool to perform the conversion. But ...

While Excel is incredibly powerful for organizing data and performing calculations, repetitive tasks like data entry, ...

and there among all the files would be a CSV file full of your tweets and the associated metadata. You could then load the CSV into Excel, convert it into a table, and save the resulting workbook.