JSON to TypeScript Interface Generator

Generate TypeScript interfaces from any JSON object, including nested types.

JSON Input

TypeScript Interfaces

export interface User {
  name: string;
  age: number;
  email?: string | null;
}

export interface Root {
  user: User;
  scores: number[];
  active: boolean;
}

TypeScript interfaces define the shape of objects, enabling static type checking in your code. This generator analyzes JSON data and produces accurate TypeScript interfaces — handling nested objects as separate named interfaces, arrays with proper item types, and nullable fields as optional properties. It saves time when working with API responses or configuration objects.

Frequently Asked Questions

: It generates TypeScript interfaces (export interface) with proper types for strings, numbers, booleans, arrays, nested objects, and optional (nullable) fields.

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