Every conversion, and what each one costs you

120 conversions, each one proved by running it, not by asserting it. A pair that fails its tests gets no page, which is why this list has gaps instead of promises.

The glyph matrix is on the formats page. Every pair is listed below by source format.

From 3DM

From 3DS

From 3MF

From AMF

From BREP

From COLLADA

From FBX

From GLB

From glTF

From IGES

From OBJ

From PLY

From STEP

From STL

From USDZ

From VRML

What the words mean

◆ lossless
The geometry is unchanged. Anything the target cannot store (a unit, colour, the separation between parts) is still listed on the pair's own page.
◇ tessellated
Exact surfaces become triangles. A hole that was a cylinder becomes a many-sided prism. That is unavoidable when the destination is a mesh format.
≈ approximated
A solid is reconstructed from triangles. You get a real solid with planar faces; you do not get cones, spheres, NURBS surfaces or a feature tree back.