Possible conversion of freestyle to solidify outline?

[wilemben]

Would there be a way to convert blender’s freestyle lines to an outline mesh (similar to solidify modifier) to upload a model to other 3D viewer applications? (I don’t think Sketchfab and others are compatible with the freestyle component of blender?)

[BlenderNPR]

Here's some background...

1. Freestyle is an offline post process. Only available in Blender and other places with Freestyle.
2. While solidify modifier mesh (inverted hull) is a one sided mesh covering the mesh. Available everywhere.
3. LANPR is a post process, generating floating mesh. Only available in Blender.
4. Malt line art is a filter. Only available in Malt.

Now to under your question.
Freestyle line is view dependent.
The line generated only appear where it appear, and not covering the whole mesh.
So it is not possible to convert freestyle to inverted hull.
Their line detection method are very different.