In MongoDB, data is stored in a binary format called BSON (Binary JSON), which is a superset of JSON (JavaScript Object Notation). While both BSON and JSON are used to represent data in MongoDB, they have some key differences.


BSON is a binary-encoded serialization of JSON-like documents. It is designed to be efficient in storage, traversability, and encoding/decoding. Some of its key features include:


JSON is a lightweight and human-readable data representation format that can be easily parsed and generated by many programming languages. It is used widely as a medium for transmitting data over the web. Some features of JSON include:


While BSON and JSON are related, they serve different purposes in the context of MongoDB:

By using BSON internally, MongoDB can take advantage of its benefits in storage, traversability, and a richer data type representation while still providing the interoperability and readability of JSON through query interfaces and drivers.