JSON to GraphQL schema

How to use it

1. Enter json input and root type name.
2. The result appears straight away and updates as you edit.
3. Copy the result, or copy a link that keeps the same values to share it.

How it is calculated

String, Int, Float, Boolean and [T] lists, with a type per object. A field that is always present and never null gets !. GraphQL Int is 32-bit, so numbers above 2147483647 become Float with a comment, and mixed values use a JSON scalar.

Example

Inputs: Root type name = Root. Result: Generated code: type Root { id: Int! name: String! email: String! isActive: Boolean! # JSON key: "is_active" balance: Float! tags: [String!]! address: Address! orders: [Order!]! } type Address { city: String! postalCode: String! # JSON key: "postal_code" } type Order { orderId: String! # JSON key: "order_id" total: Float! coupon: String }; Types generated: 3; Fields: 13.

{
  "id": 1024,
  "name": "Sara Ahmed",
  "email": "sara@example.com",
  "is_active": true,
  "balance": 1520.75,
  "tags": ["vip", "riyadh"],
  "address": { "city": "Riyadh", "postal_code": "12211" },
  "orders": [
    { "order_id": "A-1", "total": 99.5, "coupon": "EID10" },
    { "order_id": "A-2", "total": 120, "coupon": null }
  ]
}

type Root {
  id: Int!
  name: String!
  email: String!
  isActive: Boolean! # JSON key: "is_active"
  balance: Float!
  tags: [String!]!
  address: Address!
  orders: [Order!]!
}

type Address {
  city: String!
  postalCode: String! # JSON key: "postal_code"
}

type Order {
  orderId: String! # JSON key: "order_id"
  total: Float!
  coupon: String
}

Limits and caveats

• The JSON scalar needs a server-side definition, such as the one in graphql-scalars.
• GraphQL does not rename keys, so a renamed field needs a resolver that reads the original key.