JSONToTable

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How to Convert JSON to GraphQL - Step by Step Guide

Step 1

Input Your JSON Data

Start with your JSON data. Whether you're migrating from REST APIs, need to generate GraphQL schemas, or want to format JSON first, you have several options:

•
Paste directly: Copy your JSON data from API responses and paste into the editor
•
Upload a file: Click "Upload" to select a .json file
•
Try the sample: Click "Sample" to see conversion in action

Example: JSON Input

Here's sample JSON data from an API:

{
  "id": 1,
  "name": "John Doe",
  "email": "[email protected]",
  "isActive": true,
  "posts": [
    {
      "id": 101,
      "title": "Hello World",
      "published": true
    }
  ]
}
Step 2

Automatic Schema Generation

The converter automatically analyzes your JSON structure and generates GraphQL types:

•
Type inference: Automatically detects strings, numbers, booleans, and nested objects
•
Array handling: Converts JSON arrays to GraphQL list types
•
Nested types: Creates separate type definitions for nested objects

Example: GraphQL Schema Output

The generated GraphQL types:

type User {
  id: Int!
  name: String!
  email: String!
  isActive: Boolean!
  posts: [Post!]!
}

type Post {
  id: Int!
  title: String!
  published: Boolean!
}
Step 3

Review Generated Schema

Verify the generated GraphQL schema:

•
Valid GraphQL: Output follows GraphQL schema specification
•
Type safety: All fields properly typed with nullability
•
Ready to use: Copy directly into your GraphQL server
Step 4

Export and Implement

Use your generated schema:

•
Copy to clipboard: One-click copy for pasting into your GraphQL server
•
Download as file: Save as .graphql file for your project
•
REST migration: Perfect for migrating REST APIs to GraphQL

Frequently Asked Questions

How does JSON to GraphQL conversion work?

The converter analyzes your JSON structure, identifies data types (strings, numbers, booleans, arrays, objects), and automatically generates corresponding GraphQL type definitions with proper field types and nullability. Nested objects become separate type definitions with relationships.

Can I use this for REST to GraphQL migration?

Yes! This is perfect for REST to GraphQL migration. Paste your REST API JSON responses, and the tool will generate GraphQL schemas that match your data structure. This accelerates migration and ensures type compatibility. You can then validate the schema before deployment.

Are the generated types production-ready?

The generated GraphQL types follow best practices and are production-ready. However, you may want to customize type names, add descriptions, or adjust nullability based on your specific requirements. The output provides a solid starting point for your GraphQL schema.

How are JSON arrays converted to GraphQL?

JSON arrays are converted to GraphQL list types with proper syntax. For example, an array of strings becomes [String!]!, and an array of objects creates a new type definition for the object structure with a list reference. The converter handles nested arrays and complex structures automatically.

Can I convert the schema to other formats?

Yes! Once you have the GraphQL schema, you can use our other tools to convert it to different formats. Try GraphQL to TypeScript for type-safe code, or format the schema for better readability.

Is this tool free to use?

Yes, completely free with no limitations on file size or usage frequency. No registration required, and you can convert unlimited JSON data to GraphQL schemas.

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