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JSON to TypeScript Interface Generator

Generate TypeScript interfaces from JSON samples.

local browser tool

Root interface nameJSON sample

{
  "id": 1,
  "name": "Madabase",
  "tags": ["tools", "ai"],
  "owner": {
    "email": "hello@madabase.com"
  }
}

TypeScript output

export interface Root {
  id: number;
  name: string;
  tags: string[];
  owner: RootOwner;
}

export interface RootOwner {
  email: string;
}

Introduction

Generate starter interfaces from sample JSON so you can speed up typing for APIs, DTOs, and UI state models.

Step 1

Use a representative object or payload sample.

Step 2

The tool infers primitive values, nested objects, and arrays.

Step 3

Review the generated types and adjust domain-specific naming.

Input

{"id":1,"name":"Ada"}

Output

interface Root {
  id: number;
  name: string;
}

Can it infer nested objects?

Yes. The MVP generator creates nested interfaces for object fields and arrays.

Does this tool upload my input?

No. This tool runs in your browser for the first release, so your input stays local.