JSON Type Generator

Turn sample JSON into TypeScript, Zod, Valibot, or TypeBox definitions.

Input stays in this browser

Turn sample JSON into typed contracts for your next API or data model.

Root name

Target

Sample JSON

Generated code

export interface User {
  "name": string;
  "age": number;
  "active": boolean;
}

How it works

Paste representative JSON, choose a target library, and copy generated type definitions.

Your sample data never leaves the browser.