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Online JavaScript Compiler

Write, compile, and run JavaScript instantly in your browser.

Free online JavaScript editor with AI coding assistant, real-time error detection, and ES2024 support. Our JS compiler runs your code instantly — no setup required.

Start Free

No credit card required · Free to use

or download desktop client forMac, Windows, Linux

11M+

Developers

23M+

Projects Created

2016

Since

TRUSTED BY *

* registered email accounts from associated companies

Run JavaScript Online Instantly

PlayCode lets you run JavaScript online without any setup. Just open your browser, paste your code, and execute it instantly. Our online JS editor supports ES2024, TypeScript, and JSX — the fastest way to test JavaScript code online.

Free JavaScript Editor with Live Preview

Our online JavaScript editor shows results as you type. Write JS code and see the output instantly in the live preview. The JS editor highlights syntax errors in real-time, supports npm packages, and works on any device. No downloads needed — just a free online JS editor in your browser.

JavaScript Compiler with AI Assistant

Unlike basic online compilers, PlayCode includes an AI coding assistant. Get help writing code, fixing bugs, and learning JavaScript. Our JS compiler combines real-time compilation with AI-powered suggestions — the modern way to code online.

Why Use an Online JavaScript Compiler?

An online JavaScript compiler lets you test code without installing Node.js or build tools. PlayCode's JS online environment runs in your browser, supports npm packages, and compiles code instantly. Perfect for quick tests, debugging, learning, and sharing JavaScript examples.

Get on Board

Quick Start from a Template. Start instantly using pre-made templates. Over 2 million NPM packages available from the start. React, Vue, Lodash, RxJs, p5.js, Three.js and more.

See Result as You Type. Experience the fastest coding experience ever with PlayCode. Instantly observe the results as you type.

Debug in Console. Enhance your speed and debugging skills rapidly using PlayCode's efficient platform.

Live collaboration is built-in. Conduct coding interviews or create together with others from anywhere in the world, on any device.

          
            // Task 1: Sum of All Elements in an Array
// Example:
console.log(sumArray([1, 2, 3, 4])); // 10

          
            // Hmm... Let me try
function sumArray(arr) {
    return arr.reduce((acc, curr) => acc + curr, 0);
}

// That's a really elegant solution!

Deploy and Share your Project. Make your projects live with just one click. With zero setup and custom domains, sharing your web apps with the world has never been simpler.

.playcode.io

Features

Code Autocomplete. Enhance your coding speed and efficiency with smart code autocomplete feature. Avoid checking the documentation frequently.

Bug Finder. PlayCode can identify and display all errors, providing assistance to fix them. Write, run code, correct any errors quickly.

The Most Flexible Layout.

Arrange panels as you like.

Upload Assets. Images, videos, sounds, shaders and others.

Color Themes.

Feels great in any environment.

Ready to use
JavaScript Playground

No need to configure your own IDE preset, start immediately.

Start coding

Code seamlessly from any device

Jumping from your Mac to your iPad to your iPhone is no problem. Web editor is optimized for all devices.

What our users value

Easy to use

Fast

Best for learners

The best way to run JavaScript online.

I've tried many tools to run JavaScript online, and PlayCode is by far the fastest. Just open the browser and start coding — no setup, no downloads. Running JS online has never been this smooth. Perfect for quick tests and prototyping.

- David Chen

Try PlayCode Playground for free

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Try out PlayCode Coding Courses

Learn HTML, CSS, JavaScript and React easily through our interactive PlayCode Courses. Take a leap in your learning journey and upgrade your skills today.

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