The File Extensions Database

Search over 10,000 file extensions and software programs.

Today's File Type – August 22nd


Microsoft Office Macro Reference File

An MSO file is a macro reference file created when saving a Microsoft Office document as a webpage. It contains information about macros and OLE (Object Linking and Embedding) objects included in the original file and may be referenced by the created webpage as a style sheet. MSO files may be viewed with a text editor, but will be unreadable since the contents are encoded.   View more »


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