JSON, JavaScript Object Notation, is a lightweight, text-based data format widely used for exchanging information between a server and a web application. Despite the name, it's now used across virtually every programming language, not just JavaScript, thanks to its simple, easy-to-parse structure.
What JSON Looks Like
A simple JSON object might look like: `{"name": "Ferdy", "category": "WordPress"}` — structured data organized cleanly as key-value pairs, both human-readable and straightforward for a computer to parse.
Where JSON Shows Up in WordPress
- The WordPress REST API returns site data formatted as JSON
- Many plugins store their settings internally as JSON
- AJAX requests between a browser and WordPress typically exchange data in JSON
- Schema markup (JSON-LD) uses JSON specifically to describe structured data to search engines
Why It Became the Web's Standard
- Considerably lighter and simpler to parse than the older XML format
- Native, built-in support across virtually every modern programming language
- Genuinely easy for a human to read and understand at a glance
- Well suited to representing nested, hierarchical data structures