To repair corrupted Excel Files, try Open and Repair function of MS Excel first.

It is built-in repair function that helps me fix my corrupt .xlsx files and open them.

As it is a built-in feature, it has a drawback.

It might not work in severe corruption issues.

In such situation, we can try a third-party Stellar Phoenix Excel Recovery Utility to Fix MS Excel Corruption Issues provide step-by-step wizard to provide quality results in all kinds of repair tasks which can easily recover/repair all damaged XLS/XLSX files in their original format.