.ASCX File

.ascx is ASP.NET User Control File

Key Features: .ASCX File Extension

What's on this Page

The ascx file extension is associated with the Active Server Pages (ASP.NET), a server side scripting engine used to generate active web pages.

The ascx file stores a part of dynamic web page, for example active menu.

An ascx file extension is related to the Active Server Pages and used for its web user control files.

Use compatible tools to work with *.ascx files.

Probably cannot be converted to anything else.

ASP.NET User Control File - File openers

Associate the ASCX file extension with the correct application. On :
Windows: Right click on any ASCX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.ASCX files". Mac: Right click (or Ctrl-click) the ASCX 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 .ASCX is ASP.NET User Control File. Because only the current version supports the latest ASCX file format. Search, therefore, e.g. on the Microsoft manufacturer website after an available .ASCX is ASP.NET User Control File update.
To make sure that your ASCX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.