Online JavaScript to TypeScript Converter

Have a file? Upload

Additional Instructions

How to use this tool?

This free online AI code converter lets you convert code from JavaScript to TypeScript in a click of a button. To use this converter, take the following steps -

Type or paste your JavaScript code in the input box.
Click on the "Convert" button.
The converted TypeScript code will be displayed in the output box.

Examples

The following are examples of code conversion from JavaScript to TypeScript using this converter. Note that you may not always get the same code since it is generated by an AI language model which is not 100% deterministic and gets updated from time to time.

Example 1 - Is String Palindrome

Program that checks if a string is a palindrome or not.

JavaScript Code:

TypeScript Code:

Example 2 - Even or Odd

A well commented function to check if a number if odd or even.

JavaScript Code:

TypeScript Code:

Differences

The following are some key differences between JavaScript and TypeScript.

Characteristic	JavaScript	TypeScript
Syntax	JavaScript has a more flexible and forgiving syntax compared to TypeScript.	TypeScript has a stricter syntax compared to JavaScript, with the addition of type annotations.
Paradigm	JavaScript is a multi-paradigm language that supports both object-oriented and functional programming.	TypeScript is a superset of JavaScript and supports the same paradigms as JavaScript, with the addition of static typing.
Typing	JavaScript is a dynamically typed language, which means that types are determined at runtime.	TypeScript is a statically typed language, which means that types are determined at compile time.
Performance	JavaScript is generally slower than TypeScript due to its dynamic typing and lack of type checking.	TypeScript is generally faster than JavaScript due to its static typing and type checking.
Libraries and frameworks	JavaScript has a vast collection of libraries and frameworks, including React, Angular, and Vue.	TypeScript can use the same libraries and frameworks as JavaScript, with the added benefit of type checking and better IDE support.
Community and support	JavaScript has a large and active community with plenty of resources and support available.	TypeScript has a growing community with increasing support and resources available.
Learning curve	JavaScript has a relatively low learning curve due to its forgiving syntax and dynamic typing.	TypeScript has a steeper learning curve compared to JavaScript due to its stricter syntax and static typing.

Instant AI Code Converters
— No Setup Required

Convert your code between languages with AI-driven accuracy. Choose a converter and get started instantly.