JSON to GraphQL Schema
Convert JSON objects to GraphQL type definitions, interfaces, or classes automatically.
About JSON to GraphQL Schema
Generate a GraphQL schema type definition from JSON. Infers GraphQL scalar types (String, Int, Float, Boolean, ID) from JSON values and creates nested type definitions for nested objects. Useful when designing a GraphQL API that will serve existing JSON data from a REST API or database.
FAQ
How are null values handled?
Null values in JSON are mapped to nullable/optional types in the target language. In TypeScript: field: Type | null. In Go: *Type (pointer). In Python: Optional[Type]. In Java: Optional or @Nullable annotation. If a field is null in your sample JSON, consider providing a more complete sample where the field has a real value so the type can be accurately inferred.