Convert REST API Response to TypeScript

Generate TypeScript types from a typical REST API JSON response. Paste your API JSON output and get complete typed interfaces for your TypeScript app.

100% client-side. Your data never leaves your browser. 

// Generated by DevBento — json-to-typescript
interface RootAddress {
  street: string;
  city: string;
  zip: string;
}

interface RootPostsItem {
  title: string;
  likes: number;
}

interface Root {
  id: number;
  name: string;
  email: string;
  isActive: boolean;
  roles: string[];
  address: RootAddress;
  posts: RootPostsItem[];
}
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Convert REST API Response to TypeScript

This example shows how to generate TypeScript types from a typical REST API response. The pre-filled JSON represents a user object with nested address, array of roles, and array of post objects.

What You Get

The tool produces:

How to Use

  1. The example loads with a sample user API response already filled in
  2. Toggle between Interface and Type output modes to see both styles
  3. Copy the generated types and paste them into your TypeScript project
  4. Replace the sample data with your actual API response to generate types for your specific endpoint

Real-World Pattern

Most REST APIs return objects with nested structures and arrays. This example covers the common pattern: flat fields at the top level, a nested object for related data, and arrays for collections. The generated types give you full IntelliSense support when working with API responses in TypeScript.