What is an ARX file?
An .ARX file primarily functions as an AutoCAD Runtime Extension File developed by Autodesk. These files act as plugins or add-ons that add new commands and advanced features to AutoCAD. Under the hood, these specific .ARX files are compiled C++ programs that use the standard EXE or DLL format structure.
While AutoCAD is the most common creator, an .ARX file can also be an Apex report file from Apex Software, an ARIS report archive from Software AG, a Historical process data archive from Wonderware, or even camera metadata from Sony CineAlta cameras.
How to open ARX files?
Because the .ARX extension has multiple possible meanings, we recommend using viewer.online/arx to identify the actual format of your file. For native CAD files, you typically load them directly inside the AutoCAD software using the `APPLOAD` command.
If you do not have the native software installed, viewer.online/arx analyzes .ARX files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Summary
Because standard AutoCAD Runtime Extension File .ARX files use the known EXE format structure, viewer.online/arx can safely open and display them online, eliminating compatibility problems.