Are generated types production-ready?

They are a strong starting point. Review optional fields, unions, and naming before committing to your codebase.

Does it handle nested objects and arrays?

Yes. The generator infers nested structures and creates separate interfaces where needed.

No. Type generation runs entirely in your browser.

JSON to TypeScript Generator

Convert sample JSON into TypeScript interfaces for faster API typing and frontend scaffolding.

json to typescript interface generatorjson to typescriptgenerate interface from jsonjson to ts convertertypescript interface generatorapi response to interface

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Turn sample JSON API responses into TypeScript interfaces to bootstrap typings for frontend and backend projects.

How it works

1Paste a representative JSON payload and the generator infers nested object and array types.
2A root interface name keeps output ready for direct use inside a TypeScript codebase.
3Use the result as a starting point, then refine optional fields and exact literal unions as needed.

Examples

Generate types from a user payload

{"id":"usr_1","name":"Ava","roles":["admin"],"profile":{"timezone":"UTC"}}

When to use this tool

Generate interfaces from example API payloads.
Scaffold nested types for documentation and mocks.
Iterate quickly before refining optional fields manually.

JSON to TypeScript Generator