DevToolKit

JSON to TypeScript & Zod

Transform JSON to production-ready TypeScript interfaces or Zod schemas instantly. Supports discriminated unions, JSDoc, and recursive nesting. 100% private.

Type Generator

TypeScript Architect

Global Options

Interfaces Only (No Classes)
Use Nice Property Names
Generate Readonly Props
Pro Developer Tip

Switch the target to Zod Schema to generate runtime validation logic alongside your static types. Great for API clients!

JSON Input
Generated TypeScript
Was this tool helpful?

How to Use

The JSON to TypeScript & Zod tool is a professional type architect for modern full-stack development.

How to use this tool

  1. Sample Input: Paste your sample JSON response into the left editor. The tool handles complex nesting and arrays automatically.
  2. Output Target: Toggle between TypeScript (standard interfaces/types), Zod (runtime validation), or JSON Schema.
  3. Type Customization: Set the root interface name and toggle options like readonly properties or standard naming conventions.
  4. Recursive Generation: The tool recursively analyzes your data to generate a complete tree of related interfaces and types.
  5. Copy Result: Click the copy button to grab the generated code and paste it directly into your .ts files.

About This Tool

End-to-End Type Safety

Manually writing interfaces for large API responses is slow and prone to errors. Our generator uses the industry-standard Quicktype engine to infer strict types from your data, ensuring your application code is robust and self-documenting.

Beyond basic TypeScript, the integrated Zod support allows you to bridge the gap between static types and runtime validation, giving you 100% confidence in the data entering your system.

Why Use This Tool

Privacy for Proprietary Models

Your data models and API schemas are often confidential. Unlike cloud-based converters, DevToolKit performs all type inference **locally in your browser memory**. Your proprietary JSON data never leaves your device, keeping your architectural intellectual property secure.

FAQ

Does it generate interfaces or types?
It generates interfaces by default, which are the standard for defining object shapes in TypeScript. It can also generate type aliases and Zod schemas for runtime validation.
What is a Zod schema?
Zod is a TypeScript-first validation library that validates data at runtime. Unlike interfaces that only exist at compile time, Zod validates that actual data conforms to the defined schema.
How does it handle arrays with mixed types?
Arrays with different element types are inferred as union types. For example, [1, "text", true] generates (number | string | boolean)[].
NavigateOpenEscClose