Import Bulk Json to Firebase

How can import the bulk json files to firebase using REST API.
Is their any document or example for search in firebase.
Is every search query string is saved in the firebase as file.

Can we store JSON in Firebase?

All Firebase Realtime Database data is stored as JSON objects. You can think of the database as a cloud-hosted JSON tree. Unlike a SQL database, there are no tables or records. When you add data to the JSON tree, it becomes a node in the existing JSON structure with an associated key.

How do I import a Firebase collection?

Go to the Cloud Firestore Import/Export page in the Google Cloud Platform Console. Click Import.

Consult the Firebase REST API Quickstart and REST API Docs for examples of how to upload / import JSON and interact with the JSON store.