A wsn file extension is related to the WhoopSee and used for its skin files.
WSN file extension - WhoopSee skin
What is wsn file? How to open wsn files?
File type specification:
The wsn file extension is associated with the WhoopSee software.
The wsn file stores customized skin.
The WhoopSee app seems to be obsolete product without support from developer, or distributor.
This wsn 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.