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

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Error Message when mở cửa Excel file

Note that this is a method specific to lớn the above error message.

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How to lớn do:

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


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

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Change khổng lồ .xls

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

Step 3: Click File, then choose Convert to convert .xlsx. Click OK and Yes to agree to convert.

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Convert function
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Excel file has been fixed & converted khổng lồ its original format (.xlsx)

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

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Conclusion:This is an extremely fast method khổng lồ handle the error in Excel: “because the file format or file 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.

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