You cannot open the Excel file and receive the following error message:"Excel cannot open the tệp tin "filename.xlsx" because the tệp tin format or file extension is not valid. Verify that the file has not been corrupted and that the tệp tin extension matches the format of the file."

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Error Message when open Excel file

lưu ý that this is a method specific lớn the above sầu error message.

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How to do:

Fix "Excel cannot open the tệp tin because the tệp tin format or file extension is not valid"


Step 1: Find the corrupt Excel file, press F2 or right-click và choose Rename. Then change the file extension from .xlsx to .xls (tif he file extension is hidden, go lớn Folder Options khổng lồ show the tệp tin extension).

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Change to .xls

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Step 2: After that open Excel file (.xls). You should now be able to open the normal Excel tệp tin.However, for safety and better use, please convert the file extension from.xls to .xlsx again.

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Step 3: Clichồng File, then choose Convert lớn convert .xlsx. Cliông chồng OK Yes to agree lớn convert.

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Convert function
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Excel tệp tin has been fixed và converted lớn its original format (.xlsx)

Done, now you can reopen the Excel file (.xlsx) to lớn use it.

Conclusion:This is an extremely fast method lớn handle the error in Excel: “because the file format or tệp tin extension is not valid”.I"m not 100% sure this method solved. But if this doesn"t work, you can phản hồi below, I will help you.