AXD file is known as HTTP handler file. There are further two types of AXD files; Script resource files and Web resource files.
These files are generated at runtime whenever the user uses ScriptManager in his Web application. These files are generated only once when the user adds them to the server. These files contain all the required routines for Ajax that are based on client side javascript. The AXD files are introduced into the server with AJAX and they cannot find their application elsewhere without the addition of AJAX language. These are necessary files required for proper running of website.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .AXD file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .AXD file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .AXD file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.
There may be several reasons why you cannot open the file with .AXD extension. Directly on this website you can find a solution of the most common problem with the .AXD file – that you do not have on your computer the appropriate program to open the file.