File extension .ASMX
Full Name | Developer | Category |
---|---|---|
Active Server Plus Web Services Source Format | Microsoft | Web Files |
The ASMX file extension is used in Microsoft ASP.NET and is associated with the ASP.NET web service file type. Specifically, the file contains an XML-based programming language code which allows a website or application to interact with other websites or platforms. It allows applications to exchange data from a client to a server machine.
Compatibility Overview
The ASMX file type is compatible with the different versions of the.NET family, like .NET Core 3.X, .NET Standard 2.X, .NET Framework 2.0 SP2 – 4.8, although it can be opened with other.NET-supported languages such as C# and VB.NET.
File Formats
The ASMX file type is formatted in ASPX XML markup language and written using entities, declaration, tags, and attributes, which makes versions created before 2010 not able to function smoothly in modern applications. These files are typically coupled with the binary Windows Compiled Binary Language files ( .DLL) as dependent libraries.
Related Files
The ASMX type is closely related to .ASCX, .ASP, and .ASHX files, which are also commonly used as XML web service files compliant with the.NET Framework.
Programs for WINDOWS system
Programs for MAC system
After installing the required software, the operating system will usually automatically associate an unknown file type (in this case .ASMX) with the new application. If this does not happen, we can help the system a bit by selecting the software for it, which it should always use to open files with the .ASMX extension.
When choosing the software we can select the system to use this software every time.
Remember!
Using it for the first time it is good to check whether the .ASMX file opened in the application can be read by us and opens in a way that allows us to use it. If everything is in order, select this option the next time you open a file with the .ASMX extension. However, if the file has not opened correctly, we have to look for a different software, with which we can open files with the .ASMX extension. Select a different software from our list and install it on your computer. After the software is installed, repeat inspection openings of a .ASMX file. Sometimes you have to repeat the operation several times.
Other instructions
If none of the programs listed by us to work with the .ASMX file has not meet your expectations, you can try searching other websites. But remember to avoid downloading programs "that can open any file". These applications not only have very limited functionality, but may also expose you to expense tens of dollars when purchasing a license.
In the vast majority of cases you will find the program dedicated to support the .ASMX file, or any other file format. In addition, there is a chance that it will be a free program, and its functionality (concerning the .ASMX file) will be extended to the maximum.
It is also good to check
- if the .ASMX file has no errors
- or if it has been copied (or downloaded by the browser) thoroughly
Author’s guidelines

Mr B. Adam
Author of the guidelines / Founder of FileExtension.info
New technologies enthusiast, helping to solve problems with the files.
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