The most obvious way to produce a PDF file from a .vss file would be to use MS Visio, the very same program that was used to save the .vss file in the first place. Alternative would be some utilities that support import of Visio formats, but given the fact how closed the format are, there won't be many.
Convert Microsoft Visio smartshapes data to Adobe Portable document format.
We have found 2 software records in our database eligible for .vss to .pdf file format conversion.
Microsoft Windows software - convert vss to pdf on Windows
A diagram application, that uses vector graphics to create diagrams. Microsoft Visio is distributed as part of Microsoft Office Family and also available as a subscription through Microsoft Office 365. The latest version is Visio 2016 that is compatible with Windows 7, Windows 8 and Windows 10.
Visio allows users to create professional diagrams in just few clicks. Visio makes diagramming simple—whether you want to quickly capture a flowchart that you brainstormed on a whiteboard, map an IT network, build an organizational chart, document a business process, or draw a floor plan.
Convert from vss file
to pdf file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned vss to pdf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert vss to pdf on OS X
VSD Viwer Pro is viewer for Macs that allows users to view VSD, VSS, VDX, VSX, VSDX, and VSSX email attachments and it is also able to export them to PDF and other picture image formats.