Javascript to Typescript
Convert any Javascript code to Typescript with AI.
JavaScript to TypeScript conversion adds static type annotations to your JS code — enabling compile-time error detection, better IDE support, and safer refactoring. JS2TS automates this process using AI, reducing manual conversion time from hours to seconds.
Paste your code here. Then click Convert.
Prompt
Typescript
How to use this tool?
This online converter harnesses AI to seamlessly convert your JavaScript code to TypeScript in just a click of a button. Follow these steps to make the most of this advanced converter:
- Type or paste your JavaScript code into the input box provided. You can directly enter your code or copy it from your favourite code editor.
- Initiate the conversion process by clicking on the "Convert" button
- Instantly view the transformed TypeScript code in the output box. The AI-powered converter ensures accurate and efficient conversion.
Example: Simple Function
Javascript
// JavaScript
function greet(name) {
return 'Hello, ' + name + '!';
}
console.log(greet('Alice')); // Output: Hello, Alice!
TypeScript
// TypeScript
function greet(name: string): string {
return 'Hello, ' + name + '!';
}
console.log(greet('Alice')); // Output: Hello, Alice!
Frequently Asked Questions
What is JavaScript to TypeScript conversion?
JavaScript to TypeScript conversion is the process of adding static type annotations to existing JavaScript code. TypeScript is a superset of JavaScript that enables compile-time error detection, better IDE autocomplete, and safer refactoring — especially valuable in large codebases.
Is JS2TS free to use?
Yes, completely free. No account or sign-up required. Paste your JavaScript code, click Convert, and copy the typed TypeScript output instantly.
What TypeScript patterns does the converter support?
The AI-powered converter handles function signatures, object interfaces, array types, union types, generics, type inference, class definitions, and module exports — covering the most common JavaScript-to-TypeScript migration patterns.
Can I convert large JavaScript files?
Yes. JS2TS handles files of any size. For very large codebases, you can paste sections of code and convert them incrementally.
Does JS2TS store my code?
No. Conversions are processed in real time and your code is never stored or logged on our servers.