concretesubmarine.com/ FORUM

If you forget your Excel file password, then the best solution is to use eSoftTools Excel Password Recovery Software. This software, which is 100% virus-free, supports all versions of Excel, including Xlsx, Xlsm, Xls, Xlsb, Xla, Xlam, and Xltm. Whether it is composed of specific characters, numbers, letters, or symbols, it will recover the password very quickly. The three recovery attack methods provided by this tool are brute force, mask, and dictionary. Any type of complex password can be recovered using this recovery method. You can use the free demo pack that this utility provides to you.

Get More - Unprotect Excel Sheet without password