File Extension ASX

  • Full name
    Microsoft Advanced Streaming Redirector Format
  • Developer
  • Popularity
Have you encountered a problem with a ASX file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a ASX file here. In the further part of this page we have added a list of programs that should open your ASX file. It is enough you choose a proper application for your operating system, download and install it.


The extension ASX denotes Advanced Stream Redirector files. These are also known as Windows Media metafiles.

This format was developed on the XML syntax based on Microsoft Corporation and may be ANSI or Unicode (UTF-8) encoded.

The file contains a structure of items that reference specific actions or settings in Windows Media Player. For example, you can pass a list of media files that you want to process in a specific order. Also references to these files are possible.

This is one of the main applications of ASX files. They can be used to refer to files provided on the Internet, for example on web servers. These are then streamed and played using the Windows Media Player.

An ASX file can also contain instructions on how to present the corresponding medium. Also, meta information may be included that will overwrite information contained in the files.

The files can also be used to create playlists for Windows Media Player.

Programs which can open a ASX file

How to open a ASX file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the ASX file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a ASX file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support ASX files. At this point we are looking for disk space where the application was installed in and we can link it with a ASX file. Since then, our operating system will use the selected program to support all ASX files.

Other issues

Despite the described problem with ASX there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the ASX file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the ASX file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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