JavaScript Console - Online JS Playground

Code Editor

Console Output

Click "Run Code" to see output here...

Tips

Use console.log() to output values
All standard JavaScript features are supported
Code runs in a sandboxed environment
Press Ctrl+Enter or click "Run Code" to execute

What is JavaScript Console?

Need to test JavaScript code quickly without setting up a project? JavaScript Console is an interactive online playground where you can write and run JavaScript code instantly. Perfect for testing snippets, learning JavaScript, or debugging code on the fly.

According to MDN Web Docs, the console is one of the most powerful tools for JavaScript development. Our console supports all standard JavaScript features including ES6+ syntax, async/await, and modern JavaScript APIs. Everything runs in a sandboxed environment for safety.

The best part? Everything runs in your browser. Your code never touches our servers – it executes locally in your browser. It's fast, free, and private.

What Makes This Tool Different

Full JavaScript Support

Supports all standard JavaScript features including ES6+, async/await, promises, and modern APIs. Write any JavaScript code you need.

Real Console Output

See output from console.log(), console.error(), and other console methods. Just like a real browser console.

Sandboxed Environment

Code runs in a safe sandboxed environment. Test code without worrying about breaking anything or security issues.

Keyboard Shortcuts

Press Ctrl+Enter to run code quickly. Fast workflow for testing multiple code variations.

Sample Code

Load sample JavaScript code to get started quickly. Perfect for learning or as a starting point for your code.

Instant Execution

Code runs instantly when you click "Run Code". No compilation, no waiting – immediate results.

How It Works

Write Your Code

Type your JavaScript code in the editor on the left. You can use console.log() to output values, or click "Sample" to load example code.

Run Your Code

Click "Run Code" or press Ctrl+Enter to execute your JavaScript. The code runs in a sandboxed environment and output appears in the console panel.

View Output

See the output from console.log() and other console methods in the console output panel. Clear the output anytime to start fresh.

When You'd Actually Use This

Learning JavaScript

Learn JavaScript by testing code snippets. Experiment with different syntax and see results instantly. Perfect for beginners and experienced developers.

Quick Testing

Test JavaScript code snippets quickly without creating a full project. Perfect for debugging or verifying code logic before adding to your project.

Prototyping

Prototype JavaScript ideas quickly. Test algorithms, data structures, or API calls without setting up a development environment.

Code Examples

Share JavaScript code examples with others. Run code to demonstrate concepts or show how something works.

Common Questions

Is my code stored?

Nope. Everything happens right in your browser. Your code never leaves your computer – we don't even see it.

What JavaScript features are supported?

We support all standard JavaScript features including ES6+, async/await, promises, classes, arrow functions, and modern JavaScript APIs. Most modern JavaScript code will work.

Can I use external libraries?

Currently, we support standard JavaScript only. External libraries aren't loaded, but you can test core JavaScript functionality and APIs.

Is it safe to run code?

Yes! Code runs in a sandboxed environment. It can't access your file system or make network requests. Safe for testing any JavaScript code.

How do I see output?

Use console.log() to output values. All console methods (console.log, console.error, console.warn, etc.) work and display in the output panel.

Can I clear the output?

Yes! Click "Clear Output" to clear the console output. Perfect for running multiple tests without old output cluttering the view.

Other JavaScript Tools You Might Need

Testing is just one JavaScript task. Here are other tools that work well together:

Need to learn more about JavaScript? Check out MDN JavaScript Guide or JavaScript.info.