.ASX File

File extension asx is used for Advanced Stream Redirector files. Also known as Windows Media Metafiles, these are text files that provide information about a file stream and its presentation.

The asx files go beyond the simple task of defining playlists to provide Windows Media Player with information about how to present particular media items of the playlist.

Windows Media Metafiles are based on XML syntax and can be encoded in either ANSI or UNICODE (UTF-8) format. They are made up of various elements with their associated tags and attributes. Each element in a Windows Media metafile defines a particular setting or action for Windows Media Player.

The asx files can point to any media file type that Windows Media Player recognizes and supports.

MIME types:
application/asx
application/ms-asx-plugin
application/ms-asx

Files with asx extension are commonly used for Advanced Stream Redirectors. A link of sort used to launch streamed video in Media player.

How to open:

Use Windows Media Player to open *.asx files.

How to convert:

These files are generally not meant to be converted to anything else.