Convert json files to gltf

i download an model from playcanvas editor,can I convert this files to a single file in gltf?
here is my resourses:

I’m afraid not. The JSON is our custom format and a convertor doesn’t exist for it.

You be better off getting the source FBXs and putting them into a single scene with Max/Maya/Blender and exporting it as a glTF GLB.

What’s the reason for needing to do this out of interest?

Thanks for your reply; i am insterest for the beatiful model of some projects,and i have download the viewer code give a try;

There are a few features that will be made public soon that will help with this including being able to copy and paste assets between projects.