JSON Tools and Validation Guide
What is JSON Format?
JSON (JavaScript Object Notation) is a lightweight, text-based data interchange format that's easy for humans to read and write, and simple for machines to parse and generate. It has become the standard for web APIs and configuration files.
{ }[ ] {
"name": "John Doe",
"age": 30,
"skills": ["JavaScript", "Python"],
"active": true
}
JSON Schema Validation
JSON Schema provides a contract for your JSON data, ensuring it meets specific requirements. It defines the structure, data types, required fields, and validation rules for your JSON documents.
{
"type": "object",
"properties": {
"name": { "type": "string" },
"age": {
"type": "integer",
"minimum": 0,
"maximum": 120
}
},
"required": ["name"]
}
Common JSON Syntax Errors
Avoid these frequent mistakes that cause JSON parsing errors. Our validator helps you identify and fix these issues instantly.
Missing Quotes
Property names must be enclosed in double quotes
Trailing Commas
Remove commas after the last item in objects/arrays
Single Quotes
Use double quotes, not single quotes for strings
Incorrect
{
name: 'John',
age: 30,
}
Correct
{
"name": "John",
"age": 30
}
Why Use JSON Master?
Powerful, free tools to format, validate, and transform your JSON data. Save time and eliminate errors with our comprehensive JSON toolkit.
Format & Beautify
Transform messy JSON into readable, properly indented code instantly
Validate & Fix Errors
Detect syntax errors with precise line numbers and helpful suggestions
Convert Formats
Transform between JSON, CSV, XML, and YAML with one click
Query with JSON Path
Extract specific values from complex nested JSON structures easily
