Stellar Repair for Excel software can fix corrupt Excel workbooks of any size (MS Excel software required).
It removes corruption from individual objects, fixes the damage, and restores the Excel file (.xls, .xlsx, .xltm, .xltx, and .xlsm) back to its original state. The Excel repair tool can repair multiple Excel files in a batch and fix all types of corruption errors such as unrecognizable format, unreadable content, file name is not valid, the file is corrupt and cannot be opened, etc.
This is a trial version and shows preview of the repaired Excel files. You need to purchase the software to save the repaired files.