Converting json to yaml

I am using the import plugin to import json files into markdown content.

To achieve this I am using code such as:

{{ page.header.imports.ex_config|json_encode(constant('JSON_PRETTY_PRINT') b-or constant('JSON_UNESCAPED_SLASHES'))|e('html') }}

Is it possible to convert this into yaml content? Each json file I am importing needs to have a yaml equivalent, but I don't want to have to maintain both files, so it would be good to be able to single source from one json file which can be converted to yaml within the markdown (or 1 yaml file which is converted to json)