JSON to GraphQL Converter
ConvertersGenerate a GraphQL SDL schema from a JSON object instantly in your browser. Type-inferred scalar fields, nested types, and lists. One-way. Client-side.
JSON →
GraphQL
JSONjson
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GraphQLgraphql
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Input: 315 chars
About JSON to GraphQL Converter
The JSON to GraphQL Schema converter analyses a JSON object and generates a GraphQL SDL (Schema Definition Language) type definition. JSON string values map to `String`, numbers to `Int` or `Float`, booleans to `Boolean`, nested objects to named GraphQL types, and arrays to `[T]` list types. The output is ready to copy into a GraphQL schema file.
Features
- ✓Custom JSON-to-GraphQL SDL schema inference engine
- ✓Generates GraphQL type definitions from JSON structure
- ✓String → String, Int/Float → Int/Float, Boolean → Boolean
- ✓Nested objects → named GraphQL Object types
- ✓Arrays → GraphQL list types ([T])
- ✓null values → T (nullable by default in GraphQL)
- ✓Root type named after the JSON root key or defaults to Query
- ✓Download generated schema as a .graphql file
- ✓Copy output to clipboard in one click
- ✓Web Worker processing — never blocks the UI
- ✓100% client-side — data never leaves your browser
Common Use Cases
- Scaffolding a GraphQL schema from a JSON API response
- Generating GraphQL type definitions for a new data model
- Quickly prototyping GraphQL queries by deriving types from sample data
- Converting JSON mock data to GraphQL SDL for schema-first development
Frequently Asked Questions
QDoes it generate resolvers?
No — the output is a GraphQL SDL type definition only. You add resolver implementations separately.
QIs my data sent to a server?
No. All schema generation runs in a Web Worker inside your browser.