GraphQL to TypeScript Converter
Generate TypeScript types and interfaces from GraphQL schemas instantly. AI-powered with smart scalar mapping and nullability handling.
How It Works
Paste Your Schema
Paste any GraphQL schema definition types, enums, inputs, queries, mutations. The editor validates your schema in real-time.
Click Convert
Our AI analyzes your schema structure, maps custom scalars, and generates precise TypeScript interfaces with proper nullability handling.
Copy & Use
Copy the generated TypeScript types or download as a .ts file. Drop them into your project for instant end-to-end type safety.
Why Use This Tool
End-to-End Type Safety
Generated types ensure your frontend queries match your GraphQL schema exactly catch breaking changes at compile time, not in production.
Smart Scalar Mapping
AI maps custom scalars like DateTime to Date, JSON to Record<string, unknown>, and generates a Scalars type map for your project.
No Manual Type Writing
Stop maintaining TypeScript types by hand. Paste your schema and get production-ready interfaces in seconds.
Flexible Output
Choose between TypeScript enums or union types, Maybe<T> or | null nullability, readonly properties, and more.
FAQ
What GraphQL features are supported?
All standard GraphQL schema features: object types, input types, enums, unions, interfaces, scalars, queries, mutations, and subscriptions. Both SDL and introspection-style schemas work.
How accurate is the AI-generated output?
The AI understands GraphQL semantics and maps types precisely. Custom scalars get intelligent type mappings, nullable fields are handled correctly, and the output is validated as compilable TypeScript before being returned.
What happens without AI?
The AST fallback generates correct TypeScript types by directly mapping GraphQL types. It handles all standard types, enums, unions, and inputs. AI adds smarter custom scalar mapping and enhanced type inference.
Should I use enums or union types?
Union types (type Status = "ACTIVE" | "INACTIVE") are generally recommended for better tree-shaking and simpler usage. TypeScript enums work well when you need reverse mapping or prefer the enum syntax.
Does it handle nullable fields correctly?
Yes. Non-null fields (String!) become required properties, while nullable fields become optional with | null or Maybe<T> depending on your preference. Array nullability ([String!]! vs [String]) is also handled precisely.
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