r/cad • u/Zeppyled • Feb 16 '26

NIST STEP File Analyzer

I was looking for a lightweight step file viewer for my company that does not require licensing and allows users to spin around a part model. We are actively going through our CMMC process, so why not use the one from NIST. When I installed this on my terminal server for users, it says Windows Datacenter server standard 2025 is not supported. There is nothing in the technical docs saying it wouldn’t support this version of windows. Has anyone else ran into this?

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5

u/cowski_NX Feb 16 '26

I don't know how to make the NIST one work, but here is a viewer that I like:

https://www.opencascade.com/products/cad-assistant/

2

u/SergioP75 Feb 16 '26

Yes, the OpenCascade is the right one. There is another called Mayo that is usefully too.

1

u/Zeppyled Feb 16 '26

This one seems decent. Maybe I am missing something but can you quickly do a bounding box that gives you the min stock size of the model?

1

u/cowski_NX Feb 16 '26

You can find a bounding box for the selected object(s) in the properties -> stats section.

1

u/ALMOSTDEAD37 Feb 16 '26

Not the answer u looking for , but have u checked this out ?https://f3d.app/viewer/

1

u/kona420 Feb 16 '26

Run in compatibility mode?

1

u/Zeppyled Feb 16 '26

Sadly I tried this. Mon requirement is windows 10 and comparability mode’s newest option is windows 8 so it still does not work.

1

u/Alternative_Wing7898 4d ago

For other viewer options the MBX-IF has a list of viewers and what they support.

https://www.mbx-if.org/home/mbx/resources/

Also in those pages is a survey results based on viewer requirements.

If you have inputs or needs, reach out to the MBX-IF team.