{ }
JSON Formatter
Format and validate your JSON data with proper indentation.
What is JSON?
- JSON (JavaScript Object Notation): A lightweight data interchange format.
- Easy for humans to read and write, easy for machines to parse and generate.
- Widely used for APIs, configuration files, and data storage.
- More concise than XML, making it the web development standard.
JSON Syntax Basics
β’ Objects: Curly braces with key-value pairs, e.g. object notation
β’ Arrays: Square brackets, comma-separated values
β’ Strings: Must use double quotes (single quotes not allowed)
β’ Numbers: Written without quotes (integers and decimals)
β’ Booleans: true or false (lowercase only)
β’ null: Represents empty value (lowercase)
Common JSON Errors
- β’ Trailing comma: Comma after the last item causes errors
- β’ Single quotes: Strings must use double quotes only
- β’ Comments: JSON doesn't support comments
- β’ Unquoted keys: All keys must be strings (quoted)
- β’ undefined: null is valid, but undefined is not
JSON Use Cases
- β’ REST APIs: Server-client data communication
- β’ Config Files: package.json, tsconfig.json, etc.
- β’ NoSQL Databases: MongoDB, Firebase data storage
- β’ Local Storage: Browser data persistence