JavaScript Object Notation, a simple but powerful format for data. It can describe complex data structures, is highly machine-readable as well as reasonably human-readable, and is independent of platform and programming language, and is therefore a popular format for data interchange between programs and systems. Source: ODH.

JavaScript object notation is an open standard format that uses human readable text to transmit data objects consisting of attribute–value pairs. It is the most common data format used for asynchronous browser/server communication (AJAJ). Source: EUOD.

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999. JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.

Source: USOD