MSO File - opening and understanding

Did your computer fail to open a MSO file? We explain what they are used for and recommend software that we know can open or otherwise handle your .MSO files.

What is a MSO file?

Files that contain the .mso file extension are created by the Microsoft Office 2000 application. When you send an HTML message with a Microsoft Word 2000 attachment using the Microsoft Outlook email application, the message will attach an Oledata.mso file to the email message. This allows users who are not using the Outlook email application to view the file correctly even though they do not have the same software.

The .mso file extension is also created by the Microsoft Organization Chart tool. This tool allows users to create and edit organizational charts in Microsoft Office 2003. The charts that are created are saved with the .mso file extension.

How to open MSO files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension MSO for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 7 different MSO openers which you will find listed below.

Suggest another file format using extension MSO

While we know of one file format using the .MSO file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .MSO file.

Various viewers for this file format

These apps are known to open certain types of MSO files. Remember, different programs may use MSO files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Free File ViewerFree File ViewerUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
Adobe AcrobatAdobe AcrobatUser submitted
QuickTimeQuickTimeUser submitted
Adobe PhotoshopAdobe PhotoshopUser submitted
EMSOEMSOUser submitted
ICS ViewerICS ViewerUser submitted
We have not verified any software that we know for certain will work with MSO-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with MSO-files. If you know one, please use the 'Suggest a program' link below and tell us about it!