JSON Schema Validation - Complete Tutorial

What is JSON Schema?

JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It provides a contract for your JSON data, ensuring it meets specific structural and data type requirements.

With JSON Schema, you can validate user input, ensure API responses are correct, generate documentation, and even create forms automatically.

Basic Schema Structure

A basic JSON Schema looks like this:

{
  "type": "object",
  "properties": {
    "name": { "type": "string" },
    "age": { "type": "number" },
    "email": { "type": "string", "format": "email" }
  },
  "required": ["name", "email"]
}

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Key Topics Covered

• → Schema design principles and best practices
• → Validation keywords: type, properties, required, enum
• → Advanced features: oneOf, anyOf, allOf, not
• → Format validation: email, uri, date-time, uuid
• → Schema composition and reusability
• → Code generation from schemas