Software

obj2gltf (convert)

https://github.com/CesiumGS/obj2gltf

obj2gltf -i obj.obj -o gltf.gltf

gltf-pipeline (compress with draco)

https://github.com/CesiumGS/gltf-pipeline

gltf-pipeline -i uncompressed.gltf -o compressed.gltf -d