Unfortunately, it’s impossible to convert an exported Flow from a blob into a JSON format or vice-versa.
Kindly note that the exporting flow feature is only for backing up or transferring flow from one agent to another. It isn’t recommended to modify the exported flow file as editing/creating flow files should be done using the Dialogflow Console or API. This ensures that changes are validated by the system and keeps troubleshooting to a minimum.
Moreover, you can also consider exporting structured agent resources using the API. Below are the list of API methods that you can use:
REST
Transition Route Groups
RPC
Agents
Entity Types
Intents
Transition Route Groups
Webhooks