Unable to open .xlsb worksheet

Question

Hello everyone,

I'm seeking assistance for resolve/fix following error while open the file any .xlsb worksheets,

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

Thank you.

Answer 1

Hi,

Did all .xlsb files have this problem?

I suggest you use Excel's built-in "Open and Repair" feature. To do this, open Excel, go to File > Open, select the file, click on the arrow next to the Open button, and choose Open and Repair.

About the error message, I also suggest you refer to this support article:

https://support.microsoft.com/en-us/office/a-file-is-in-a-different-format-than-its-extension-indicates-in-excel-0d2dfb3f-b5a9-4a71-9712-0084672921a7

Just checking in to see if the information was helpful. Please let us know if you would like further assistance.

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