Files with pubx file extension may exist. However, at the moment, we do not have any information regarding their origin or purpose.
What is pubx file? How to open pubx files?
The pubx file extension is not used any known application.
However it can be confused with the pub file extension that is related to Microsoft Publisher and used for its document files.
Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)