Convert JSON to TypeScript

Instantly generate TypeScript interfaces from your JSON data. Simplify your frontend development.

Input JSON
JSON
Valid JSON only
TypeScript Interfaces
TS

The Only JSON to TypeScript Converter You Need

Stop manually typing interfaces. Our JSON to TypeScript Converter automatically generates precise TypeScript interfaces from your JSON objects. Whether you're working with complex nested APIs or simple configuration files, this tool ensures type safety and speeds up your development workflow.

How to Convert JSON to TypeScript

  1. Paste your JSON data into the Input JSON editor on the left.
  2. Click the Convert button in the center.
  3. Copy the generated code from the TypeScript Interfaces editor or download the .ts file.

Key Features

100% Client-Side & Secure

Your data never leaves your browser. Conversion happens locally using the powerful json-to-ts library, ensuring maximum privacy.

Deep Nesting Support

Accurately creates interfaces for deeply nested objects and arrays of objects, detecting types like string, number, boolean, and null.

Instant Conversion

No server latency. Get your TypeScript interfaces in milliseconds, even for large JSON files.

Developer Friendly

Standardized output ready to drop into your Angular, React, Vue, or Node.js projects.

Frequently Asked Questions

No. This tool processes your data entirely within your browser using JavaScript. No data is transmitted to or stored on our servers.

Yes. If you provide an array of objects, the tool analyzes the structure and creates a unified interface that matches all items in the array.

Yes, simply click the Download icon in the output editor header to save the result as a .ts file.
Example Transformation
Input JSON{
  "id": 1,
  "user": {
    "name": "John Doe",
    "active": true
  }
}
Output TypeScript
interface User {
  name: string;
  active: boolean;
}
interface RootObject { id: number; user: User; }