What is JSON to GraphQL Schema Generator?
This tool converts JSON data into GraphQL Schema Definition Language (SDL). It automatically infers GraphQL types from JSON values, handling nested objects, arrays, and primitive types.
How to Use
- Set the root type name for your GraphQL schema
- Paste your JSON data into the input area
- Click "Generate GraphQL Schema" to convert
- Copy the generated SDL and use it in your GraphQL server
Why Use This Tool?
Automatic type inference from JSON values
Handles nested objects and arrays
Generates standard GraphQL SDL syntax
Supports Int, Float, String, and Boolean types
Marks required fields with ! notation
Tips & Best Practices
- Use realistic sample data for accurate type inference
- Null values default to String type
- Empty arrays default to [String] type
- Nested objects become separate GraphQL types
Frequently Asked Questions
How are JSON types mapped to GraphQL?
JSON strings → String, integers → Int, floats → Float, booleans → Boolean, null → String, arrays → [Type], objects → separate GraphQL types.
What is SDL?
SDL (Schema Definition Language) is a human-readable syntax for defining GraphQL schemas. It uses type keyword to define types and their fields.
Are nested objects supported?
Yes, nested JSON objects are converted to separate GraphQL types with proper references. The tool automatically detects and creates all necessary types.
Is my data sent to a server?
No, all processing happens entirely in your browser. Your JSON data never leaves your device.