JSON → TypeScript Interface

Paste sample JSON and generate TypeScript interface types. 100% client-side.

About JSON → TypeScript

Sample API payloads are the fastest way to sketch TypeScript interfaces. Generating types from JSON reduces boilerplate when wiring clients.

This tool infers nested objects and arrays from your sample. Refine unions and optional fields for production APIs.

How to use this tool

  1. Paste a representative JSON response.
  2. Set a root interface name.
  3. Generate and copy into your project.

FAQ

Are types exact for all responses?

No. Inference uses one sample. Multiple shapes may need unions or optional fields.

Privacy

JSON stays in your browser. Privacy Policy.

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JSON Formatter · JSON Schema Generator · JSON Diff

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