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How to Use JSON to GraphQL: Complete Step-by-Step Guide

Learn how to use JSON to GraphQL with our complete step-by-step guide. Includes pro tips, common use cases, and expert best practices for getting the best results.

What Is JSON to GraphQL?

Convert JSON to GraphQL schema types instantly. Generate GraphQL type definitions from JSON samples for your API schema.

How to Use JSON to GraphQL: Step by Step

Follow these simple steps to get started with JSON to GraphQL:

1. Paste your JSON: Copy your JSON data and paste it into the input textarea above.

2. Configure options: Toggle nullable detection and type naming preferences for your GraphQL schema.

3. Copy the GraphQL code: Click Generate, then copy the GraphQL type definitions or download the .graphql file.

Pro Tips for Using JSON to GraphQL

Get the most out of JSON to GraphQL with these expert tips:

Use sample data with all fields: Include all fields that exist in your API in the sample JSON — fields missing from the sample will be absent from the generated types.

Review nullable annotations: Nullable (!) markers are inferred from your sample data. Review the generated types and adjust based on your actual schema requirements.

Common Use Cases for JSON to GraphQL

JSON to GraphQL is perfect for:

  • Generating GraphQL type definitions from sample API response JSON
  • Creating initial schema types for GraphQL server development and prototyping
  • Documenting REST API responses as GraphQL types for migration planning

    • Why Use JSON to GraphQL Online?

    JSON to GraphQL runs entirely in your browser — no downloads, no uploads, no sign-up required. Your data stays private on your device. It is free to use with no limitations, making it the perfect choice for developers, designers, and professionals who need quick, reliable results without compromising security.

    Frequently Asked Questions

    What GraphQL features are supported?▼

    The generator creates type definitions with proper field types, non-null (!) markers, list types ([]), and nested type references. Input types and enums are not generated.

    How does nullable detection work?▼

    If a field has a null value in your JSON, it is marked as nullable (without !). If all instances of a field have non-null values, it gets the non-null (!) marker. In array mode, null elements mark the array item as nullable.

    Is my data sent to a server?▼

    No. All conversion happens locally in your browser.

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