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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.
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:
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 the...
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.
12 Αυγ 2023 · If you’re experiencing an invalid extension error when trying to open an Excel file, there are a few common causes to consider. Here are the usual culprits, beginning with the most common.
4 Ιουλ 2020 · Press Windows+R and write excel.exe /safe and click OK. Good Luck. 1 Like. devindaoson1991. replied to Muthu69.
2 Μαΐ 2024 · In this comprehensive guide, we’ve outlined eight practical solutions to the common Excel error: “Excel cannot open the file because the file format or file extension is not valid.” It’s best to start by verifying your file’s integrity and format, then methodically try each solution one by one.
