Opening MSO Files

The MSO file type is primarily associated with Word.

MSO	File extension: MSO
	File type:	email document macro

What is an MSO file?

MSO files mostly belong to Word by Microsoft. An MSO file is an email document generated when some of the earliest versions of Word is used to edit an email document. This file contains HTML code, macro objects, and settings used to render the body of an email in Outlook email client. An MSO file is sometimes sent as an email attachment. Another type of MSO file is a macro object used by various Windows programs.

How can I open an MSO file?

You need a suitable software like Word to open an MSO file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your MSO file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a MSO file directly in the browser:. Just drag the file onto this browser window and drop it.

Online MSO Text Viewer

Choose your .mso file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert MSO files:

Word by Microsoft
See the previous paragraphs to learn more about the main application. MSO files are often referred to as Word miscs because this type of file is primarily created or used by this software.
FrontPage (macro) by Microsoft
FrontPage is a discontinued editor for creating and administering web sites on Windows platforms. It could create and render a web page and macro object saved in an MSO file. This file format is classified as Misc.
Medly Sound (sound module) by Paul van der Valk
Medly Sound is an audio routine processing and sound editing software for classic Windows operating system. It saves a sound module in an MSO file. This file format is classified as Misc.
Organization Chart (macro object) by Microsoft
Organization Chart is an add-in used to generate charts in Office programs. A web page document and macro created with this tool is saved in an MSO file. This file format is classified as Vector Image.
Outlook (email document macro) by Microsoft
Outlook is a cross-platform email and calendar management client application. It uses an MSO file to render the body or attachment of an email. This file format is classified as Misc.
Windows (macro object) by Microsoft
Windows is a proprietary operating system for desktop and server platforms. It uses macro objects saved in an MSO file. This file format is classified as Misc.

MSO file format:

If you know the file format, you can also find out how to open or edit the file. The file format can be deduced from the file extension and the signature. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. So a detailed analysis of a file is vital in order to determine the format and the associated program. Below you will find our evaluation of the MSO files:

The MSO file extension is very common and mainly uses a defined MSO format. But the following two file formats are common:

95% of all MSO files lack a uniform signature. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. The files are 4 KB to 450 KB in size, with a median of 39 KB. The file type is very recent. A usual file name is oledata.mso. Files like these are sometimes connected to logoaphp.
4% of all MSO files are associated with ActiveMime object. If you open these files in a text editor, you will see only illegible characters. The files are 760 KB to 2 MB in size, with a median of 1 MB. Certain words are almost always found in the files, such as ActiveMime, Regular, Cambria Math, Version 6.99, Version 5 and Wingdings. The file name editdata.mso is typical for these files.

The remaining 1% of all MSO files are files with no common format, the following 3 formats exist: DOC. If you want to find out what your MSO file contains, drag and drop it onto this page.

Technical Data for MSO File Extension

File classification:

Misc

Related files:

msox, msop, emz, ole, wmz, mos, oms, ms0, pdf, zip, downloadfile-6, txt, html, jpg, doc, docx, eml, mco, smo, msor, asd

Mime type:

audio/x-mod, application/x-mso

an mso email document macro is a special file format by Microsoft and should only be edited and saved with the appropriate software.

How to solve problems with MSO files

Associate the MSO file extension with the correct application.
Update your software that should actually open email document macros. Because only the current version supports the latest MSO file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available Word update.
To make sure that your MSO file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
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