Frequently Asked Questions

Paste your JSON payload into the input editor. The tool instantly infers strings, numbers, arrays, and objects, automatically generating ready-to-use TypeScript interfaces, type aliases, or Zod schemas on the right. No login required.

Copy the raw JSON payload from your browser's network tab, Postman, or cURL request. Paste it into the converter, and it will recursively map every nested field into clean TypeScript interfaces, giving you perfect type safety for your fetch or axios requests.

Yes. Select "Zod Schema" from the Output dropdown. The converter maps JSON primitives to z.string(), z.number(), and z.object(), saving you hours of writing manual runtime validation logic. It also automatically includes z.infer<typeof Schema> typings.

Deeply nested JSON trees are automatically flattened into linked TypeScript interfaces. A JSON array containing objects will generate a distinct interface for the object shape and output an array type signature like MyNestedItem[].

Interfaces are ideal for defining object shapes and support declaration merging, making them great for API responses. Type aliases are more flexible and support unions or mapped types. Our tool supports both—simply toggle the output setting to match your codebase preferences.

While there are VS Code extensions available, using our online converter requires zero installation, doesn't slow down your IDE, and provides advanced features like instant Yup/Zod schema generation alongside standard TypeScript interfaces.

Yes. All conversion happens entirely in your browser using JavaScript. Your JSON data is never sent to any server, stored, or logged. You can verify this by opening your browser's DevTools Network tab — you will see zero requests during conversion.