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1 Φεβ 2024 · Rename the file extension to match the format of the file, such as .xlsx or .xls: Right-click on the Excel file then go to properties > General tab > Rename the file extension. Repair your Excel file: Repair a corrupted workbook - Microsoft Support. Change Trust Center settings:
When you open a file in Excel, you get an message that the file name extension doesn't match the actual file format. For example, the file has an .xlsx file name extension but it's really a text file and should have a .txt file name extension.
15 Ιαν 2021 · Here's a look at how to restore file associations if Excel won't open: In Windows 10: In the Windows Search Box, Search for 'Default apps'. Click on the 'Set defaults by app' option lower down in the list. Select Excel in your Default Programs list and click the 'Manage' button.
21 Οκτ 2022 · How to Fix the “Excel Cannot Open the File Because the File Format or File Extension is Not Valid” Issue? Although the issue can cause quite the panic, the workarounds are actually pretty simple! The solutions include changing the file compatibility to repairing corrupt Excel files.
19 Ιουν 2021 · A common error message that usually occurs when someone tries to open an Excel file in Windows is Excel cannot open the file because the file format or extension is not valid. Make sure...
Workbooks are saved as Excel Workbooks (.xlsx) by default. You can change the default file format to any other file format that is supported in Excel. For example, if you frequently create macros in a workbook, you may want to automatically save a new workbook as an Excel Macro-Enabled Workbook (.xlsm).
4 Ιουλ 2020 · The file is not compatible with the Excel-version. The file has become corrupt or damaged. I copied and pasted the file to my desktop, right-click and changed '.xlsx' to '.xls'. Boom!! I got my file back. Try to open your corrupt file in safe mode. Press Windows+R and write excel.exe /safe and click OK. Good Luck. 1 Like. devindaoson1991.
