“The Concise Binary Object Representation (CBOR) is a data format whose design goals include the possibility of extremely small code size, fairly small message size, and extensibility without the need for version negotiation.”

JSON data model CBOR is based on the wildly successful JSON data model: numbers, strings, arrays, maps (called objects in JSON), and a few values such as false, true, and null. No Schema needed One of the major practical wins of JSON is that successful data interchange is possible without casting a schema in concrete. This works much better in a world where both ends of a communication relationship may be evolving at high speed.

Embracing binary Some applications that would like to use JSON need to transport binary data, such as encryption keys, graphic data, or sensor values. In JSON, these data need to be encoded (usually in base64 format), adding complexity and bulk. Concise encoding Some applications also benefit from CBOR itself being encoded in binary. This saves bulk and allows faster processing. One of the major motivators for the development of CBOR was the Internet of Things, which will include very simple, inexpensive nodes where this counts.