autotypex v0.0.1

autotypex 🚀

Automatically infer TypeScript types from JavaScript objects!

autotypex is a lightweight CLI tool and NPM package that dynamically analyzes JavaScript/JSON files and generates TypeScript type definitions. Perfect for developers migrating from JS to TS or handling dynamic data structures.

📺 Installation

Using Yarn

yarn add autotypex

Using NPM

npm install autotypex

Or, run it directly via npx:

npx autotypex <file.json>

🚀 Usage

CLI Usage

npx autotypex <file.json> [options]

Example: Inferring a Type from a JSON File

Given sample.json:

{
  "id": 1,
  "name": "Alice",
  "isActive": true
}

Run:

npx autotypex sample.json

👉 Output:

type InferredType =  {
	 id: number;
	 name: string;
	 isActive: boolean;
}

Custom Type Name

npx autotypex sample.json --name UserType

👉 Output:

type UserType =  {
	 id: number;
	 name: string;
	 isActive: boolean;
}

Saving Output to a .d.ts File

npx autotypex sample.json --name UserType --save

👉 Creates types/UserType.d.ts with:

type UserType =  {
	 id: number;
	 name: string;
	 isActive: boolean;
}

Working with JavaScript Files

If sample.js contains:

module.exports = {
  id: 1,
  name: "Alice",
  isActive: true
};

Run:

npx autotypex sample.js

👉 Output:

type InferredType =  {
	 id: number;
	 name: string;
	 isActive: boolean;
}

🛠 Available Options

📌 Programmatic Usage

const { inferType } = require("autotypex");

const obj = { id: 1, name: "Alice", isActive: true };
console.log(inferType(obj));

👉 Output:

type InferredType =  {
	 id: number;
	 name: string;
	 isActive: boolean;
}

🐝 License

MIT License © 2025 Rashad

🌟 Contributing

Contributions are welcome! Feel free to submit an issue or pull request.

• GitHub Repo: GitHub
• NPM Package: NPM

🚀 Happy Coding!