The File Extensions Database

.ARX File Extension

  • Developer by: Autodesk
  • Category: Plugin Files
  • Format: Binary

What is an .ARX file?

.ARX is AutoCAD Runtime Extension File

Extension file created for AutoCAD, a design and engineering application for 2D and 3D products; contains an application component written using Autodesk's ObjectARX, an object-oriented API that allows developers to customize and extend AutoCAD using C++, C#, and VB.NET program code.

ObjectARX SDKs are released with each version of AutoCAD, so you need to match the SDK version with the appropriate AutoCAD version.

Programs that open AutoCAD Runtime Extension File
Autodesk AutoCAD 2018
Autodesk ObjectARX SDK

How to solve problems with ARX files

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