.wrl
VRML worldVirtual Reality Modeling Language
A text format for 3D scenes from the mid-1990s, made to describe interactive worlds on the early web. VRML97 became an ISO standard and was later succeeded by X3D.
Older CAD and scientific models, and full-colour 3D printing.
Opens in MeshLab, FreeCAD, view3dscene, Blender (with an add-on)
About WRL files.gltf
glTF modelGL Transmission Format
An open 3D format from the Khronos Group, first released in 2015. A JSON file describes the scene and points to separate binary buffers and texture images.
Exchanging real-time 3D scenes with materials and animation between tools and engines.
Opens in Blender, three.js, Godot, Unity and Unreal (with plug-ins)
About GLTF files