JSON to TypeScript for API Response Types
Quick Answer: Paste a JSON API response to generate TypeScript interfaces. The tool infers types from values: strings, numbers, booleans, arrays, nested objects, and nullable fields. Use the generated types with fetch, axios, or tRPC for type-safe API consumption.
FAQ
Should I generate types or write them manually?
Generate from a sample response for a quick start, then refine manually. Mark optional fields with ?, add union types where values vary, and document non-obvious fields.
How do I use generated types with fetch?
const response = await fetch(url); const data: MyApiResponse = await response.json();. For runtime validation, use Zod: MyApiResponseSchema.parse(data).