What is the MSPX File Extension?

Writer:   |   Amended: December 13, 2018

Microsoft Silver

MSPX File Summary

The MSPX File Extension has one primary file type, Microsoft ASP.NET Web Page format, and can be opened with eight distinctive software programs, with the dominant related application developed by Apple (Safari software). MSPX files are categorized ordinarily as Web Files.

File Extension MSPX files have been identified on both desktop and mobile devices. They are fully or partially supported by Mac, iOS, and Windows. These files have a Popularity Rating of "Low", meaning they are not very commonly observed on your average hard disk.

Although there is a lot more to know about MSPX files, those are the most important details of these types of files. If you are having trouble opening these files, or would like more detailed information, please see our comprehensive information below.

Low
Demand
11343
Position

/ 11690

Active

Importance

13

December

2018

Refreshed

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Sorts of MSPX Files


Primary MSPX File Association

.MSPX
File Ext:.mspx
File Type:Microsoft ASP.NET Web Page

A web page that has been developed with Microsoft's presentation framework for ASP.NET; processed using Microsoft IIS (Internet Information Services) Web server. It generates content dynamically which is passed to a client's Web browser.

Developer: Microsoft Corporation
Group:Web Files
Key: HKEY_CLASSES_ROOT\.mspx

Software Programs That Open The Microsoft ASP.NET Web Page:


Safari by Apple

Mac
iOS

Internet Explorer by Microsoft Corporation

Windows
Mac

Mozilla Firefox by Mozilla

Windows
Mac
iOS
Android
Linux
Solaris
illumos

Google Chrome by Google

Windows
Mac
iOS
Android
Linux

Opera by Opera Software

Windows
Mac
iOS
Android
Linux

Microsoft Edge by Microsoft Corporation

Windows

Avant Browser by Avant Force

Windows

Microsoft IIS by Microsoft Corporation

Windows

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MSPX Usage


Leading Operating Systems

Windows (97.14%)
Macintosh (2.06%)
Linux (0.73%)
Chrome (0.05%)
Other (0.01%)

Mobile Device Share

Samsung (28.86%)
Apple (21.83%)
Huawei (9.25%)
Xiaomi (6.74%)
LG (3.11%)


Troubleshoot MSPX Files


Frequent MSPX Opening Issues

Safari is Not Installed

When you double-click your MSPX file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". Customarily, this means that Safari is not installed on %%os%%. The typical path of opening your MSPX with a double-click won't work because %%os%% cannot make the program connection.


Tip: When another MSPX application is installed, you can choose to open it by selecting "Show Apps" and using that program.


Incorrect Safari Version

Your Microsoft ASP.NET Web Page file is incompatible with Safari because you might have the wrong version installed. If you do not have the proper version Safari (or any of the other programs listed above), you may need to try downloading a different version of it, or one of the other software applications listed above. Your Microsoft ASP.NET Web Page file was probably created by a newer release of Safari than what's currently installed your computer.


Tip: Right-clicking on your MSPX, then clicking "Properties" (Windows) or "Get Info" (Mac), can provide clues about your file version.


Conclusion: The majority of MSPX file opening issues are due to not having the correct Safari version installed.


Other MSPX File Issues

In the majority of cases, installing the right version of Safari will resolve your issue. There can be other issues - unrelated to software - preventing you from opening MSPX files. Other contributing causes:

  • Windows Registry MSPX file paths that are incorrect
  • Unintentional removal of the description of the MSPX file inside the Windows Registry
  • Defective install of a MSPX program, such as Safari
  • MSPX file corruption
  • Malware-tainted MSPX file can't be opened
  • Device drivers for MSPX-related hardware are out-of-date
  • Your PC doesn’t have enough available resources to open the Microsoft ASP.NET Web Page file

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