JSON Parser & Viewer
Parse, validate, format, and view JSON data with syntax highlighting
JSON Input
Paste or type JSON data to parse and validate
Upload JSON File
Upload a JSON file (max 1MB)
Parsed JSON
Enter JSON data to parse
Formatted JSON will appear here
JSON Analysis
JSON analysis will appear here
Tree View
JSON tree structure will appear here
Example JSON Data
Simple Object
{"name": "John", "age": 30}
Array Example
["apple", "banana", "cherry"]
Nested Object
{"user": {"profile": {"name": "John"}}}
Complex Structure
API response with arrays and objects
Understanding JSON
What is JSON?
JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format. It's easy for humans to read and write, and easy for machines to parse and generate.
JSON Syntax Rules
- Objects: Enclosed in curly braces { }
- Arrays: Enclosed in square brackets [ ]
- Strings: Must be in double quotes " "
- Numbers: Integer or floating point
- Booleans: true or false
- Null: Represents empty value
Common Use Cases
- APIs: REST API request and response data
- Configuration: Application settings and config files
- Data Storage: NoSQL databases like MongoDB
- Data Exchange: Between web services and applications
JSON vs Other Formats
- vs XML: More compact, easier to parse
- vs CSV: Better for hierarchical data
- vs YAML: More widely supported, faster parsing
JSON Data Types
- String: "Hello World"
- Number: 42, 3.14159
- Boolean: true, false
- Array: [1, 2, 3]
- Object: {"key": "value"}
- null: Represents no value
Common JSON Errors
- Trailing Commas: Not allowed in JSON
- Single Quotes: Must use double quotes
- Undefined: Use null instead
- Comments: Not allowed in standard JSON
- Functions: Cannot store function definitions
Best Practices
- Consistent Naming: Use camelCase or snake_case
- Proper Indentation: Makes JSON readable
- Validate Structure: Check for syntax errors
- Escape Characters: Properly escape quotes and backslashes
JSON Tools & Libraries
- JavaScript: JSON.parse(), JSON.stringify()
- Python: json module
- PHP: json_encode(), json_decode()
- Java: Jackson, Gson libraries