Please visit the entire post here: http://blogs.msdn.com/b/officeinteroperability/archive/2011/07/12/microsoft-office-binary-file-format-validator-is-now-available.aspx

The Office Interoperability team is proud to announce the public Beta release of the Microsoft Office Binary File Format Validator (BFFValidator) tool. Available on the Microsoft Download Center , BFFValidator is a tool that will validate whether a .doc, .ppt, or .xls binary file format (bff) file is conformant with the Microsoft Office File Format Open Specifications .

Congratulations to the Office Interoperability team on a great accomplishment.