JSON Input

TypeScript Output

export interface Address {
  street: string;
  city: string;
  zip: string;
}

export interface Root {
  id: number;
  name: string;
  email: string;
  age: number;
  isActive: boolean;
  address: Address;
  tags: string[];
  scores: number[];
  metadata?: unknown;
}

Features

Nested objects create separate interfaces
Arrays detect item type automatically
Null values become optional fields
Mixed arrays produce union types
PascalCase interface names
Toggle export keyword
Toggle readonly properties
Choose type alias vs interface

JSON to TypeScript

JSON Input

TypeScript Output

Features

JSON to TypeScript

JSON Input

TypeScript Output

Features

Free Online JSON to TypeScript Converter - Generate Interfaces | 247365

JSON to TypeScript

JSON Input

TypeScript Output

Features

Free Online JSON to TypeScript Converter - Generate Interfaces | 247365

JSON to TypeScript

JSON Input

TypeScript Output

Features