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⚡ Advanced Developer Toolbox Transform, Mock, Security & API Client
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Class / Model to JSON: Keys:
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Paste JSON Payload

Paste raw JSON, drag & drop a .json file, or choose a workflow below:

○ Waiting for JSON | Lines: 0 · Chars: 0 · Size: 0 B · Depth: 0
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Generated Output

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Ready to generate
Paste JSON in the input panel and hit Beautify or Generate to see results here.

JSON to GraphQL — Generate Type Definitions from a Real Response

Starting a GraphQL API from an existing REST endpoint? Paste the JSON response and get a complete GraphQL schema: type definitions for every object, ID! inferred for fields named id or ending in _id, and boilerplate Query and Mutation types to build from.

Scalar types are mapped precisely: strings become String, integers become Int, floats become Float, booleans become Boolean. Nested objects become their own named types. Arrays become [Type!]!. The output is valid SDL that Apollo Server, graphql-js, and Hasura will accept without modification.

❓ Frequently Asked Questions

Is processing on json-to-graphql.html private and secure?

Yes. All JSON processing, parsing, and code generation happen 100% locally inside your browser sandbox. No server roundtrips or third-party tracking occur.

Is JSON Workbench free to use for JSON to GraphQL Schema Generator Online?

Yes, JSON Workbench is completely free for commercial and personal developer use with zero registration or payload limits.

Can I copy or download the generated output?

Yes! You can instantly copy the output code to your clipboard or download it as a structured file.

🧰 Complementary Developer Tools

📝 JSON Formatter & Beautifier ⚖️ Visual JSON Diff ⚡ Class to JSON Converter ✨ JSON Mock Data Generator