Developer guide
What Is JSON?
A beginner-friendly explanation of JSON objects, arrays, values, and common uses.
JSON, short for JavaScript Object Notation, is a text format for representing structured data. It is easy for people to read and simple for programs to parse.
The basic building blocks
A JSON object contains name-value pairs inside curly braces. An array contains an ordered list inside square brackets. Values can be strings, numbers, booleans, null, objects, or arrays.
Strict syntax rules
Property names use double quotes, items are separated with commas, and JSON does not allow comments or trailing commas. These small rules are a common source of parsing errors.
Where JSON appears
APIs, configuration files, browser storage, and build tools all use JSON. Its predictable structure makes it a useful contract between systems written in different languages.
Put it into practice
Format JSON