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You can only repair an Excel file in the Windows version of Excel. If you're using a Mac, try one of the other methods in this article. Its app icon resembles a green box with a white "X" on it. This option is next to a folder-shaped icon in the lower-left corner of the window. It's a folder-shaped icon in the middle of the page. Doing so opens a File Explorer window. Go to the folder in which your corrupted Excel file is stored, then click the Excel file to select it. It's the downward-facing arrow to the right of the Open button. A drop-down menu will appear. This option is at the bottom of the drop-down menu. If Open and Repair... is greyed out, make sure that your Excel file is selected and try again. If it's still greyed out, you can't repair this file. It's in a pop-up window. Windows will begin attempting to repair your file. If you don't have this option, click Extract Data instead, then click either Convert to Values or Recover Formulas. This will recover any salvageable data. This may take a few minutes if your Excel file is large. If the file still won't open, go back through this process and click Extract Data instead of Repair when prompted. Once the repaired file opens, press Ctrl+S, double-click This PC, select a save location, enter a file name, and click Save. Be sure to select a different file name than the one which you used for the corrupted Excel file.
Make sure that you're using a Windows computer. Open Excel. Click Open Other Workbooks. Click Browse. Select your Excel file. Click the "Menu" icon . Click Open and Repair. Click Repair when prompted. Wait for the file to open. Save your file.