What is JSON?
JSON (JavaScript Object Notation) is a lightweight, language-independent data interchange format. It is easy for humans to read and write, and easy for machines to parse and generate.
Did you know? JSON is the world's most popular data format, effectively replacing XML in most modern Web APIs.
JSON Syntax Rules
Valid Syntax
- •Data is in name/value pairs.
- •Keys MUST be enclosed in double quotes.
- •Strings must use double quotes.
- •Data is separated by commas.
Common Errors
- ×Trailing comma after the last element.
- ×Using single quotes instead of double quotes.
- ×Missing closing braces or brackets.
- ×Adding comments.
Common Use Cases
Web APIs (REST/GraphQL)
Standard format for API data exchange.
Configuration Files
Settings storage (package.json, etc.).
NoSQL Databases
Data storage in MongoDB, CouchDB.