ZeroServer.tools

JSON to GraphQL Schema

Generate a GraphQL SDL schema from a JSON sample. Infers types automatically, including nested objects and arrays.

JSON Sample

GraphQL Schema (SDL)

type User {
  id: Int
  name: String
  email: String
  active: Boolean
  score: Float
  tags: [String]
  address: Address
  posts: [Posts]
}

type Address {
  street: String
  city: String
  zip: String
}

type Posts {
  id: Int
  title: String
  published: Boolean
  views: Int
}

type Query {
  user: User
}

JSON to GraphQL Schema Generator

This tool analyzes a JSON sample and generates a GraphQL Schema Definition Language (SDL) schema. Type inference rules: JSON numbers without decimals → Int, numbers with decimals → Float, strings → String, booleans → Boolean, nested objects → named types (capitalized key name), arrays → list types. The generated schema is a starting point — you may want to add ! for non-null fields and adjust types for IDs.

Private & free — this tool runs entirely in your browser.