Overview
JSON (JavaScript Object Notation) is a widely-adopted, human-readable data format used for exchanging structured information between systems. It provides a simple syntax based on key-value pairs and arrays, making it easy to parse and generate across virtually all programming languages.
Originally derived from JavaScript, JSON has become a universal standard for APIs, configuration files, and data storage. Its simplicity and broad language support make it the de facto choice for modern web applications and data interchange.
Key features
- Human-readable syntax
- Language-independent
- Lightweight format
- Native support in modern languages
- Easy to parse and generate
Pros
- Universal standard with broad adoption
- Simple and intuitive syntax
- Minimal overhead compared to XML
- Built-in support in most programming languages
- Excellent for APIs and web services
Cons
- No built-in schema validation (requires external tools)
- Limited data type support compared to some formats
- No native comment support
- Can be verbose for deeply nested structures
Use this if
You need a lightweight, universally-supported format for data exchange, APIs, or configuration files.
Skip this if
You require built-in schema validation, native comments, or support for complex binary data types.
Best for
API design and documentationConfiguration managementData serializationWeb application developmentCross-platform data exchange
Alternatives
XMLYAMLProtocol BuffersMessagePackTOML
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JavaScript
The web's core programming language for interactive pages, apps, and full-stack development.
