TypeScript 7.0.0

Online TypeScript Compiler & Editor

Name: myCompiler TypeScript
Author: myCompiler

myCompiler is a free online TypeScript compiler, editor and code runner that lets you write, run, and share TypeScript code directly in your browser. It works as your TypeScript playground, sandbox, fiddle, cloud compiler, and online REPL. No downloads, no installation needed. Just open the editor and start coding with syntax highlighting, autocomplete, and instant output.

Start coding in TypeScript How it works

27+ languages Used by 1M+ developers Free forever

main.ts

interface User {
  name: string;
  age: number;
}

const users: User[] = [
  { name: "Alice", age: 25 },
  { name: "Bob", age: 30 },
];

for (const u of users) {
  console.log(`${u.name}: ${u.age}`);
}

Output

Alice: 25 Bob: 30

How to run TypeScript code online

Three steps to go from idea to running TypeScript code in this online playground. No account required.

Write your code

Open the TypeScript editor and start writing. The smart editor gives you syntax highlighting, autocomplete, and error detection as you type.

Click Run

Hit the Run button or press +Enter to run your TypeScript code on secure, sandboxed cloud servers.

See results

Output appears instantly in the integrated terminal. Errors and exceptions show up with clear, helpful messages.

Everything you need to code in TypeScript

A complete online TypeScript IDE and coding playground in your browser. Write, run, and share code without any setup.

Zero setup required

Start coding in seconds with this browser-based TypeScript interpreter. No downloads, no installations, no environment configuration. Open your browser, go to myCompiler, and start writing TypeScript code immediately.

Works on any device with a web browser. Desktop, laptop, tablet, phone, Chromebook. There is nothing to install and nothing to configure.

Feature-rich code editor

Write TypeScript with a professional-grade code editor built into your browser. Syntax highlighting colors your code for readability, making keywords, strings, and functions easy to distinguish at a glance.

Intelligent autocomplete suggests methods and properties as you type, and real-time error detection catches mistakes before you run your code.

Multi-file projects

Create and manage multiple files in a single project. Use the file sidebar to organize your code into modules, then import them across files just like in a desktop IDE.

Build modular applications with proper project structure. Each file is editable, and you can switch between them instantly.

Run code instantly

Click the Run button or press +Enter to execute your TypeScript code instantly. This online code runner displays output immediately in the integrated terminal panel. Your code runs on secure, sandboxed cloud servers and results appear in seconds.

Error messages and tracebacks are displayed clearly, making it easy to find and fix issues. The terminal supports ANSI colors for rich output formatting.

Ready to try it? Write and run your first TypeScript program in seconds.

Open TypeScript editor

TypeScript on myCompiler

myCompiler runs TypeScript 7.0.0, always up to date with the latest stable release. You get a full browser-based IDE with syntax highlighting, intelligent code completion, multi-file project support, a built-in terminal for real-time output, and standard input (stdin) for interactive programs. Write, compile, run, and debug TypeScript code on any device. Desktop, laptop, tablet, phone, Chromebook. Zero downloads, zero configuration, and no sign-up required. Save your programs with a unique URL and share them with anyone. You can also embed a working TypeScript editor on your own website.

Use this online TypeScript playground as a quick code executor for testing snippets, a coding sandbox for learning, or a cloud compiler for coding interview preparation. The editor includes dark mode for comfortable coding, keyboard shortcuts for faster workflows, and clear error messages with line numbers so you can debug quickly. Students use it for homework and practice. Teachers use it to share working examples. Developers use it to prototype ideas. myCompiler is beginner-friendly, fast, and completely free. It works in any modern web browser.

Start coding in TypeScript

TypeScript code examples

Common TypeScript patterns you can try in the online compiler. Each example is ready to run.

Hello World in TypeScript

main.ts

console.log("Hello, World!");

Variables and Data Types in TypeScript

main.ts

const name: string = "Alice";
let age: number = 30;
const isStudent: boolean = true;
console.log(`${name} is ${age} years old`);

If-Else Conditionals in TypeScript

main.ts

const x: number = 10;
if (x > 0) {
  console.log("Positive");
} else if (x === 0) {
  console.log("Zero");
} else {
  console.log("Negative");
}

For and While Loops in TypeScript

main.ts

for (let i = 0; i < 5; i++) {
  console.log(`Count: ${i}`);
}

const fruits: string[] = ["apple", "banana", "cherry"];
for (const fruit of fruits) {
  console.log(fruit);
}

Functions in TypeScript

main.ts

function greet(name: string, greeting: string = "Hello"): string {
  return `${greeting}, ${name}!`;
}

console.log(greet("Alice"));
console.log(greet("Bob", "Hi"));

Arrays and Collections in TypeScript

main.ts

const fruits: string[] = ["apple", "banana", "cherry"];
fruits.push("date");
console.log(fruits[1]);

const person: { name: string; age: number } = { name: "Alice", age: 30 };
console.log(person.name);

Classes and Objects in TypeScript

main.ts

class Dog {
  constructor(public name: string, public breed: string) {}

  bark(): string {
    return `${this.name} says Woof!`;
  }
}

const dog = new Dog("Rex", "Labrador");
console.log(dog.bark());

Error Handling in TypeScript

main.ts

try {
  const result = JSON.parse("invalid json");
} catch (e) {
  console.log(`Error: ${(e as Error).message}`);
} finally {
  console.log("Done");
}

File I/O in TypeScript

main.ts

import * as fs from "fs";

// Write to file
fs.writeFileSync("output.txt", "Hello, File!");

// Read from file
const content = fs.readFileSync("output.txt", "utf8");
console.log(content);

Generics in TypeScript

main.ts

function identity<T>(value: T): T {
  return value;
}

function firstElement<T>(arr: T[]): T | undefined {
  return arr[0];
}

console.log(identity<string>("Hello TypeScript"));
console.log(identity<number>(42));
console.log(firstElement([10, 20, 30]));

Try these examples in the editor

How to take input in TypeScript online

myCompiler supports standard input (stdin) for TypeScript programs. Use TypeScript's standard input functions to read user input. Enter your input data in the stdin panel before running your program.

This works for both single-line and multi-line input. You can read strings and convert to numbers using the language's built-in I/O functions.

Try it yourself

main.ts stdin supported

const readline = require("readline");
const rl = readline.createInterface({
  input: process.stdin
});

const lines: string[] = [];
rl.on("line", (line: string) => lines.push(line));
rl.on("close", () => {
  console.log(`Hello ${lines[0]}!`);
  console.log(`You'll be ${+lines[1] + 1} next year.`);
});

stdin

Alice
25

Output

Hello Alice!
You'll be 26 next year.

No setup, no sign-up. Start writing TypeScript code right now.

Start coding now

Getting started with TypeScript online

You can start writing and running TypeScript code right now without installing anything. Type your code, and click Run. This free TypeScript code runner executes your program instantly and displays the output in the terminal panel below the editor. Open the TypeScript online editor, type your code, and click Run.

If you're new to TypeScript, use this online TypeScript playground to start with the basics like variables, data types, conditionals, and loops. The code examples above cover all the fundamentals you need to get started. Each example can be copied into the sandbox and run immediately. No setup, no configuration.

As you progress, try creating multi-file projects, using libraries, and sharing your programs with others via URL. Sign up for a free account to save your work and build a personal library of programs. myCompiler works as a full online TypeScript IDE right in your browser.

Who uses myCompiler

Whether you're learning to code, preparing for interviews, or prototyping ideas, myCompiler is built for you.

Students & Learners

Practice exercises, complete homework assignments, and experiment with code without installing anything on school or personal computers.

Teachers & Educators

Share code examples with students via unique URLs. Embed the compiler in course materials so students can run examples directly in the browser.

Interview Candidates

Practice coding interview problems, test algorithms, and verify solutions quickly during preparation for technical interviews.

Professional Developers

Quickly prototype ideas, test code snippets, or try out a library without setting up a local environment. Great for quick experiments.

Content Creators & Bloggers

Embed interactive examples in blog posts, tutorials, and documentation so readers can run code without leaving the page.

Teams & Collaborators

Share code snippets with colleagues via URLs. Others can view, run, and fork your code to build on your work.

myCompiler vs. local IDE

Why use an online TypeScript compiler instead of installing one locally?

Feature	myCompiler	Local IDE
Setup time	Instant	Minutes to hours
Installation	None required	TypeScript + IDE required
Device support	Any browser	Desktop only
Sharing code	One-click URL	Manual (file, git, etc.)
Languages	27+ in one place	One at a time
Cost	Free forever	Free to $$$
Works on Chromebook	Yes	Limited

What is TypeScript?

TypeScript is a strongly typed superset of JavaScript developed by Microsoft and first released in 2012. Designed by Anders Hejlsberg (also the designer of C# and Turbo Pascal), TypeScript adds optional static typing, interfaces, enums, generics, and decorators to JavaScript. Any valid JavaScript is valid TypeScript, you can adopt TypeScript incrementally.

TypeScript compiles to plain JavaScript, running in any browser or Node.js environment. Its type system catches entire categories of bugs at compile time, undefined is not a function, null pointer errors, and incorrect argument types, that would only surface at runtime in JavaScript. Major projects like VS Code, Angular, and Deno are written in TypeScript.

What is TypeScript used for?

TypeScript is used for large-scale frontend applications with Angular (which requires TypeScript), React with TypeScript, and Vue 3, Node.js backend services where type safety reduces bugs in APIs, full-stack frameworks like Next.js and NestJS, library development where strong typings improve the consumer experience, and any codebase where multiple developers collaborate and need clear interfaces.

TypeScript for beginners

TypeScript is best learned after having a solid foundation in JavaScript. Once you understand JavaScript's runtime behavior, TypeScript's type system helps you write more predictable code. The TypeScript compiler's error messages are educational, they explain exactly what type mismatch occurred and why. Use myCompiler's online TypeScript compiler to experiment with types, interfaces, generics, and decorators without configuring a tsconfig.json locally.

TypeScript vs other languages

Compared to JavaScript, TypeScript adds compile-time type safety that catches bugs earlier, at the cost of a compilation step and more verbose syntax for type annotations. Compared to Flow (Facebook's JavaScript type checker), TypeScript has won the ecosystem battle, virtually all major frameworks now have first-class TypeScript support. Compared to Java or C#, TypeScript's type system is structural (not nominal) and more flexible, but the JavaScript runtime underneath means some type information is erased at runtime.

Why use an online TypeScript compiler?

An online TypeScript compiler, also called a TypeScript playground or TS sandbox, lets you compile and run TypeScript code directly in your browser without installing Node.js, tsc, or configuring tsconfig.json. It is ideal for learning TypeScript types, experimenting with generics and utility types, testing decorators, and sharing TypeScript examples with type annotations intact.

myCompiler's online TypeScript IDE performs full type checking using the official tsc compiler. Type errors appear in the output panel with line numbers. The environment supports modern TypeScript features including conditional types, template literal types, and decorators. Save and share programs via URL, completely free.

Why is TypeScript so popular?

TypeScript's rise has been meteoric, in Stack Overflow's Developer Survey it has ranked as one of the most loved languages for years running. Its adoption accelerated when Angular made it the default language and when React's ecosystem added strong TypeScript support. The key driver is developer productivity at scale: TypeScript's IntelliSense, refactoring tools, and type checking make large JavaScript codebases significantly more maintainable.

TypeScript career opportunities

TypeScript skills are now expected for most frontend and Node.js roles. Job postings for React, Angular, Vue, and Node.js developers frequently list TypeScript as a required or preferred skill. Roles include frontend engineer, full-stack developer, TypeScript/Node.js backend engineer, and Angular developer. Adding TypeScript to JavaScript knowledge significantly increases your marketability.

Try TypeScript online Free · No sign-up needed

Keyboard shortcuts

Code faster with these keyboard shortcuts in the myCompiler editor.

Run code

+ Enter

Save program

+ S

Toggle comment

+ /

Indent line

Tab

Unindent line

Shift + Tab

Undo

+ Z

Select next occurrence

+ D

Find & replace

+ H

Embed the TypeScript compiler on your website

Add an interactive TypeScript compiler to your website, blog, or learning platform. Readers can write and run TypeScript code directly on your page without leaving it.

Perfect for technical tutorials, coding courses, documentation, and educational content. Save a program on myCompiler and use the embed link to add it to any webpage.

Embedded TypeScript compiler, editor and code runner

HTML

<iframe
src="https://www.mycompiler.io
    /embed/typescript"
width="100%"
height="400"
frameborder="0">
</iframe>

Why developers choose myCompiler

A full-featured online IDE for TypeScript and 27+ other programming languages.

27+ Languages

Python, JavaScript, Java, C++, Rust, Go, TypeScript, C#, and many more. All compilers and interpreters in one place. Switch languages instantly.

Dark & Light Mode

Switch between light and dark themes with one click. Code comfortably in any lighting condition, day or night.

Mobile Friendly

Fully responsive editor optimized for phones, tablets, and Chromebooks. Code on any device with a web browser. No app download needed.

Save & Share Code

Save programs to your account, share via unique URLs, and let others view, fork, and run your code. Great for collaboration and code reviews.

Tags & Organization

Organize your saved programs with tags and find them quickly with search and filters. Build a personal library of code snippets and solutions.

No Account Required

Start writing and running code immediately. No sign-up, no email, no credit card. Create a free account later only if you want to save your work.

Explore more programming languages

myCompiler supports 27+ languages. Switch between them anytime. All free, all in one place.

C++

Java

View all 27+ languages

Frequently asked questions

Common questions about using the online TypeScript compiler, playground, and code runner.

Yes! myCompiler is completely free for all supported languages including TypeScript. There are no subscriptions, no premium tiers, and no hidden costs. Every feature is available at no charge.

myCompiler keeps its TypeScript environment up to date. You can see the exact version on the language details section of this page. We regularly update all language runtimes to their latest stable versions.

Yes. myCompiler compiles TypeScript using the official TSC compiler, which performs full type checking. Type errors will be reported in the output panel along with line numbers.

Simply open the TypeScript editor, write or paste your code, and click the Run button. Your code will be executed on our servers and the output will appear in the terminal panel within seconds.

Yes. Click Save to store your program. You will receive a unique URL that you can share with anyone. Recipients can view, fork, and run your code.

Yes. myCompiler supports multi-file projects. You can create, rename, and delete files in the sidebar. This lets you organize your TypeScript code just like in a local IDE.

Yes. All code runs in isolated containers on our servers. Each execution gets its own sandboxed environment that is destroyed after completion. Your code cannot affect other users or our infrastructure.

Yes. myCompiler has a responsive design optimized for phones and tablets. You can write and run TypeScript code on the go. The mobile interface uses tabs for switching between the editor, output, and file panels.

Yes. Click the Input tab in the bottom panel, type or paste your input data, then click Run. Your program will read from the input you provided.

Execution is fast. Code runs on our optimized cloud infrastructure and output typically appears within seconds. Execution time depends on the complexity of your program.

Yes. myCompiler provides an embed feature. You can copy an iframe snippet and paste it into your website, blog, or documentation. Visitors can edit and run code directly on your page.

myCompiler supports common editor shortcuts including Run (Ctrl/Cmd+Enter), Save (Ctrl/Cmd+S), Find (Ctrl/Cmd+F), and more. See the keyboard shortcuts section on this page for the full list.

No. myCompiler requires an internet connection because code is compiled and executed on our cloud servers. The editor itself loads in your browser, but running code requires connectivity.

myCompiler offers a fast, free, zero-setup environment with a modern code editor, multi-file support, dark mode, and instant sharing. It is ideal for learning, prototyping, interviews, and sharing code examples.

Yes. myCompiler is great for practicing algorithms and coding problems. You can write TypeScript code, provide custom input, and test your solutions instantly. Save your work and come back to it anytime.

Use print statements or console output to trace your program's behavior. myCompiler shows all standard output and error messages in the terminal panel. Error messages include line numbers to help you locate issues.

Ready to write TypeScript code?

Open the free TypeScript playground and start coding immediately. No downloads, no account required.

Start coding in TypeScript

Free · No sign-up required · TypeScript 7.0.0