view3dscene is a viewer for many 3D model formats: glTF, X3D, VRML, Collada, 3DS, MD3, Wavefront OBJ, STL and (2D) Spine JSON and sprite sheets (in CGE, Cocos2d, Starling XML formats). Explore the virtual world with collisions, gravity, animations, sensors, shadows, mirrors, shaders, and more. You can also convert all models to X3D. If you already have Castle Game Engine, then just run view3dscene executable in CGE bin subdirectory. There's no need to download it separately. All the 3D and 2D model formats supported by Castle Game Engine can be opened, X3D, VRML, Collada, 3DS, MD3, Wavefront OBJ, Spine JSON. Various navigation modes are available. Examine (easily rotate and move the whole model), walk (walk like in FPS games, with collision detection, gravity and related features available), fly (similar to Walk but without gravity), 2D. You can convert between X3D classic and XML encodings (in both directions), and you can convert from VRML 2 to X3D.