.ASMX File

.asmx is ASP.NET Web Service File

Key Features: .ASMX File Extension

Features	Description
File Extension	.asmx
Format	N/A
Created by	Microsoft
Category	Web

What's on this Page

How to open:
How to convert:

What is an .ASMX file?

The asmx file extension is associated with Microsoft Active Server Plus.

The asmx files are used for source files, which define web services called by an Active Server Page file (asp file extension) and are automatically compiled by ASP.NET when a request to the service is made. It can be accessed over the Internet or from a local network.

The asmx files begin with the ASP.NET directive "WebService," followed by the "Language" parameter. This is used to set the programming language to Visual Basic, C#, or JScript. They can be run using a Windows-based Web server with the .NET framework.

An asmx file extension is related to the Active Server Plus Web Services. An asmx file stores source data.

How to open:

Use any text editor or specialised application able to work with the asmx files, or use any internet browser to view the page.

How to convert:

Probably cannot be converted to other formats.

ASP.NET Web Service File - File openers

Windows

Microsoft Visual Web Developer
Microsoft Visual Studio 2017

How to solve problems with ASMX files

Associate the ASMX file extension with the correct application. On :
Windows: Right click on any ASMX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.ASMX files". Mac: Right click (or Ctrl-click) the ASMX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
Update your software that should actually open .ASMX is ASP.NET Web Service File. Because only the current version supports the latest ASMX file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .ASMX is ASP.NET Web Service File update.
To make sure that your ASMX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.