Generate TypeScript Types from API Responses
Paste an API JSON response and instantly generate TypeScript interfaces to type-safe your frontend code.
export interface User {
id: number;
name: string;
email: string;
isActive: boolean;
score: number;
tags: string[];
address?: null;
}
export interface Root {
user: User;
createdAt: string;
version: number;
}API tips
Paste the raw JSON from your browser's network inspector (Response tab) to generate TypeScript interfaces that match your actual API shape.
Rename the root interface to match your resource name (e.g., "User", "Order", "Product") so the generated type is immediately usable in your codebase.
Nested objects automatically become separate named interfaces. For example, an "address" field generates both a root interface and an "Address" sub-interface.
After generating, add undefined | to optional fields that might not always be returned by the API. The generator marks null values as optional (?) automatically.
Як гэта працуе
Навошта карыстацца нашым?
Also check out…
TypeScript Types for Config and Settings Objects
Generate TypeScript interfaces from JSON configura
Generate TypeScript Types from Database Records
Convert JSON-exported database records or ORM quer
Type Mock Data and Test Fixtures
Generate TypeScript interfaces from JSON mock data
Type Third-Party API Responses
Generate TypeScript interfaces from third-party AP