Mass convert xls files to xlsx files

[antaeusguy]

Hi all,

I've recently upgraded my Office from 2003 to 2010. I have a drive which contains many folders and many files. All files in the folders are in .xls format and does not contain macros.

Usually, I convert a Excel 2003 .xls file by going to File > Info > Convert, but that I've to do it one by one.

I've about 100+ .xls files in my drive. Does anyone know how to mass convert the .xls files to .xlsx files?

I think I can't just change to file extension from .xls to .xlsx as I couldn't open the .xlsx file anymore.

 

[mikerickson]

Excel 2010 opens .xls files just fine. Why not leave the files alone until they are used?