Solution 7: Open MS Excel in Safe Mode Solving the “ Excel cannot open because the file format is not valid ” problem can sometimes be as simple as booting your computer into Safe Mode . This is ...

The ‘Excel Cannot Open the File’ error usually occurs when attempting to open an older Excel file with a newer version of the software. This problem frequently arises if the file has been renamed with ...

Every now and then, when I try opening an Excel file, I get a message saying that "Excel cannot open the file 'file.xlsx' because the file format or the file extension is not valid.

To fix the Excel file format does not match extension error, trying opening the spreadsheet with the Open and Repair option or changing its file extension.

With the Excel extension is not valid error, try starting the app in Safe Mode, repair the workbook or open the file in another program.

i have a couple of excel .XLSX files that i have been trying to open but i haven't had any luck with then excel says "excel cannot open filename.xlsx because the file format or file extension is not ...

"Excel cannot open the file because the file format or file extension is not valid. Verify that the file has not ben corrupted and that the file extension matches the format of the file." ...

excel cannot open the file because the file format or file extension is not valid #357 Open janjaw007 opened on Feb 12, 2024 ...