Online REST to GraphQL Converter & Schema Mapper
Convert REST API endpoints and JSON responses into clean GraphQL schemas instantly. Free online REST to GraphQL converter that runs directly in your browser.
About REST to GraphQL
The Doffl REST to GraphQL converter transforms REST API payloads and endpoint structures into well-defined GraphQL schemas and type definitions. Ideal for frontend engineers, backend developers, and API architects migrating legacy REST services to GraphQL, this tool automates the tedious task of manual type mapping.
Operating entirely in your browser, the converter processes your JSON payloads and REST data locally on your device. Your proprietary API schemas and sensitive payload data never leave your machine, ensuring complete privacy with zero installation or setup required.
Key features
- Automatic schema type generation from REST JSON payloads
- Infers nested object types, arrays, and primitive fields
- Generates GraphQL query definitions and input types
- Runs entirely client-side for complete data privacy
- Instant side-by-side syntax-highlighted schema preview
- One-click schema copying and file export
How to use REST to GraphQL
- Paste your sample REST API JSON response into the input field.
- Set your target root type name and schema configuration options.
- Click convert to generate the corresponding GraphQL schema definitions.
- Review the generated types, fields, and query signatures.
- Copy the resulting GraphQL schema to your clipboard or download it.
Who is it for?
- Migrating legacy RESTful backend services to modern GraphQL architectures
- Prototyping GraphQL API contracts from existing JSON mock data
- Frontend engineers creating client-side types for Apollo Client or Relay
- API developers documenting data models across different architectural styles
Frequently asked questions
How does the REST to GraphQL converter work?
The tool inspects your sample REST JSON payload, analyzes data types and nested properties, and maps them directly to corresponding GraphQL scalar and object types.
Is my API payload or schema sent to a remote server?
No. The entire conversion process runs client-side in your web browser, ensuring your payloads, headers, and endpoint structures remain strictly on your machine.
Can the tool handle deeply nested JSON objects and arrays?
Yes. The mapper recursively parses nested objects and array elements, creating separate, properly linked GraphQL types for each distinct entity.
Is this REST to GraphQL tool free to use?
Yes. The converter is completely free to use online with no signup or software installation required.
Does the converter generate GraphQL mutations?
The tool primarily extracts object types and query fields from REST response payloads, but the generated input types can be directly reused to define mutation arguments.