Hereafter, you should be able to open the Excel file without any problems. How to fix Excel file format and extension don’t match? To fix the “Excel file format and extension don’t match ...

If Microsoft Excel fails to recognize a file in the XLSX or XLS format, the data contained in the file could be corrupted. When you open a corrupted workbook in Excel, the program should ...

Convert OpenOffice.org Calc spreadsheets into a Microsoft Excel file to take advantage of Excel's built-in tools. OpenOffice.org spreadsheets default to a .xsc file extension, which certain ...

Note: We have included screenshots of Excel. However, if you want to make the change in Word or PowerPoint, you must follow the same steps. The list of file extensions will be different as per the ...

When that total was reached, further cases were simply left off. For a bit of context, Excel's XLS file format dates back to 1987. It was superseded by XLSX in 2007. Had this been used ...