GraphQL to TypeScript Types
Convert GraphQL schema (SDL) into TypeScript type definitions. Generate interfaces, enums, and input types. Free online developer tool.
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What is GraphQL to TypeScript Types?
The GraphQL to TypeScript Types converter is a free developer tool that instantly transforms your GraphQL schema definition language (SDL) into clean TypeScript type definitions. Simply paste your schema with types, enums, inputs, and interfaces, and get production-ready TypeScript interfaces and enums with proper scalar mapping, nullable handling, and list type support.
Key Benefits
- Instant GraphQL SDL to TypeScript conversion
- Supports type, enum, input, and interface definitions
- Auto-maps GraphQL scalars to TypeScript types
- Handles nullable fields, list types, and required fields
- 100% client-side — your schema never leaves your browser
Common Use Cases
- •Generating TypeScript types from GraphQL APIs
- •Creating type-safe frontend code from backend schemas
- •Quickly scaffolding TypeScript types during development
- •Learning TypeScript type mappings from GraphQL schemas
How to Convert GraphQL to TypeScript Types
- Paste Schema: Paste your GraphQL SDL schema (types, enums, inputs, interfaces) into the input area.
- Convert: Click "Convert to TypeScript" to parse the schema and generate TypeScript definitions.
- Review Output: Check the generated TypeScript interfaces, enums, and types. Verify nullable fields and list types are correct.
- Export: Copy the TypeScript code to clipboard or download it as a .ts file to use in your project.
Key Features
- Full SDL Support: Parses GraphQL type, enum, input, and interface definitions from your schema definition language.
- Auto Scalar Mapping: Automatically maps GraphQL scalars to TypeScript types: String→string, Int→number, Float→number, Boolean→boolean, ID→string.
- Nullable & List Handling: Correctly handles nullable fields with | null, list types with [], and required fields with !.
- One-Click Export: Copy generated TypeScript to clipboard or download as a .ts file ready for your project.
- Zero Dependencies: All processing happens client-side. Your GraphQL schema never leaves your browser.
Frequently Asked Questions
What GraphQL types does this tool support?
The tool supports GraphQL type, enum, input, and interface definitions. It parses your SDL schema and generates corresponding TypeScript interfaces, enums, and types.
How are GraphQL scalars mapped to TypeScript?
String → string, Int → number, Float → number, Boolean → boolean, ID → string. Custom scalar types are preserved as-is (e.g., DateTime → DateTime).
Does it handle nullable and list types correctly?
Yes. Nullable fields (without !) get | null appended. List types ([Foo]) become arrays (Foo[]). Required non-null fields (!) are typed without null.
Is my GraphQL schema data secure?
Absolutely. All processing happens client-side in your browser. Your schema is never uploaded to any server or stored anywhere.