An x2d file extension is related to the X2D, a dynamic, interactive graphics file format.
X2D file extension - X2D graphics format
What is x2d file? How to open x2d files?
File type specification:
X2D is also known as a dynamic, interactive graphics file format using XML that was used to describe dynamic and interactive graphical objects.
X2D was developed by the Stanford University.
This x2d file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.