Bring a glTF asset into Blender, ZBrush, 3ds Max or any tool that speaks OBJ — with the scene hierarchy resolved instead of dumped.
glTF ships in two flavours. A .glb is a single self-contained binary — everything inside one file. A .gltf is JSON that points at external files: geometry usually lives in a sibling .bin, textures in separate images. Upload a lone .gltf whose .bin is sitting in another folder and any converter will read an empty scene, because the geometry was never in the file you gave it.
If your export produced several files, re-export as .glb (every tool offers it) and upload that instead — it is the same data, packed. We accept both here.
We resolve the node hierarchy, apply each node's transform matrix to its vertices, and merge everything into one OBJ mesh at the correct origin and scale. Geometry and UVs survive; PBR materials, textures and animation do not — OBJ's material model is decades older than glTF's. Keep the source file if you need to re-apply materials in your DCC tool.
Printing rather than editing? glTF to STL gives you a slicer-ready mesh instead.
Every converter runs the same geometry engine — see all 20 conversions.