I thought it would be easy to open dxf in any program just to view the geometry.
Yes, there are many currently available ways of viewing DXF files.
And, if you look at my text carefully, you will note that I was asking about
Anyway, you made me look for an available, free online open source DXF viewer
Autodesk Viewer is onlined but not open source. Most of the other reasonable solutions are download and install only.
For sure you know what should and should not be included in the product.
I got fired. Basically I kept asking for more, better faster. My changes - “moving fast and breaking things” as they say - were not appropriate for an established player with entrenched customers. Looking back at things, they were probably right. As for me, I am still same old same old. 