JSON to TypeScript & Zod Generator

Convert JSON objects and API responses into clean, strongly typed TypeScript interfaces or type definitions.

⚡Processed in your browser — TypeScript Interfaces, Types & Zod Schemas

Paste any JSON payload or REST API response to generate TypeScript interfaces, type aliases, or runtime Zod validation schemas (`z.object` + `z.infer`).

Root Name:

JSON Input

TypeScript Definitions

export interface UserResponse {
  id: number;
  name: string;
  email: string;
  isActive: boolean;
  roles: string[];
  profile: Profile;
  settings: Settings;
}

export interface Settings {
  theme: string;
  notifications: Notifications;
}

export interface Notifications {
  email: boolean;
  sms: boolean;
}

export interface Profile {
  avatar: string;
  bio: string;
  followersCount: number;
}

Share this tool:

What is the JSON to TypeScript & Zod Generator?

The JSON to TypeScript Generator parses raw JSON data and generates clean, strongly typed TypeScript interfaces, type aliases, or complete runtime Zod validation schemas with recursive nested object decomposition and modifier controls.

Who is the JSON to TypeScript & Zod Generator for?

Designed for frontend developers, Full-Stack TypeScript engineers, and API consumers creating type-safe data contracts and runtime validators from REST or GraphQL API responses.

How to Use the JSON to TypeScript & Zod Generator

Paste your JSON payload into the input editor.
Choose between interface, type alias, or Zod schema syntax.
Toggle optional and readonly property modifiers as needed.
Copy the generated TypeScript code or Zod schema directly into your project.

Worked Example

Converting '{"userId": 101, "username": "dev_alex", "roles": ["admin"]}' generates typed TypeScript interfaces and matching 'z.object({ userId: z.number(), username: z.string(), roles: z.array(z.string()) })' schemas.

Frequently Asked Questions

Can this generator output Zod runtime schemas?

Yes! You can toggle between TypeScript interfaces, type aliases, and Zod schemas (z.object({ ... })) to validate incoming API data at runtime.

How does it handle nested JSON objects?

Nested JSON objects are extracted into separate, cleanly named PascalCase interfaces or sub-schemas for maximum modularity.

Can it handle heterogeneous arrays?

Yes! Arrays containing mixed primitive types generate union types (e.g. (string | number)[]) and z.union(...) Zod types.

Is my JSON data kept private?

Yes. All TypeScript and Zod generation runs locally in your browser memory. No code or payloads are sent to any server.

How are nested objects handled?

Nested JSON objects are automatically discovered and split into separate, clean TypeScript interfaces or type declarations.

Can it handle JSON arrays of objects?

Yes! Arrays of objects generate an item interface alongside an exported array type alias (e.g. UserList = User[]).

Related Tools & Guides

Related Tools

All Developer Tools

JSON Schema Generator

Generate Draft-07 and 2020-12 compliant JSON Schema documents from sample JSON objects.

JSON Formatter

Format, validate, and beautify your JSON data instantly with syntax highlighting.

JSON Validator

Validate your JSON strings and detect syntax errors instantly.

Reference Guides

All Guides

JSON Schema vs TypeScript Interfaces: When to Use Each

Explore the architectural trade-offs between static TypeScript compile-time types and dynamic JSON Schema runtime validation.