Atomic Excel Password Recovery is the tool of choice, it supports most of the document encryption algorithms available in MS Office. There are several different methods of attack available in Atomic Excel Password Recovery. The program analyze a Word file you need to crack and then choose the best method. The following MS Excel versions are supported: Word 97, 2000, 2002 (XP), 2003. 100% password recovery for most of file types.
Editor's review of Atomic Excel Password Recovery

Explicably titled, this dependable password-recovery tool reveals unknown passwords linked to Microsoft Excel files.

Atomic Excel Password Recovery's guided interface is orderly. Its recovery methods work like a charm. The program uses an extensive search that runs through all possible character combinations, or you may use the password template option. Though the template scheme does the job more quickly, you'll have to know something about the password for this function to work. Simply select some specifics to hunt mystery passwords, such as whether to use symbols, and password lengths. The program even gives the estimated time it will take to reveal its findings.

If you need to close the program before it finishes the job, it conveniently picks up right where it left off. With its effective output, it's easy to recommend Atomic Excel Password Recovery as the way to get back into any password-protected Excel spreadsheet.