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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.
10 Ιουν 2021 · One solution that works is to copy the files to your desktop. save them in .xls and open them, then you can create a new .xlsx copy again. Answer here so I can continue helping you.
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:
22 Ιαν 2023 · Sometimes, the problem occurs due to the unsupported file extension of your Excel file. Step 1. Open your Excel application and then tap the “File” tab. Hit the “Export” option from the list of menus and select the “Change File Type” option. Step 2. Change files extension to some other file format that is well supported by Excel ...
2 Οκτ 2024 · How do I solve Excel file extension is not valid? 1. Change the extension format. Press the Win + E keys to open the File Explorer. Duplicate the file in case of any errors. Right-click on the target file and select Rename. You can alternatively, click on the file and press F2 to rename it.
19 Ιουν 2021 · 1] Change the file extension. If you cannot open the Excel file from its location, simply open any Excel file and click the File tab. Then, go to Open > Browse and select the file giving...
When Microsoft Excel detects a corrupted workbook upon opening, it automatically starts File Recovery mode and attempts to repair the workbook. If File Recovery mode doesn’t start, try using this manual process to recover your workbook: Click File > Open. Click the location and folder that contains the corrupted workbook.