JavaScript Online Compiler (Node‑style)

index.js
Output

Run JavaScript Online — Free Compiler

Type JavaScript and see output right away. No downloads, no accounts—just write code and press Run. Great for learning, quick checks, or sharing small ideas.

What you get

  • Instant console output
  • Light/dark themes
  • Mobile‑friendly layout
  • Code saved in your browser

How it works

Write code in the left panel and press Run. Output appears on the right. On mobile, use the tabs to switch between editor and output.

FAQs

Do I need to install anything?

No. It runs directly in your browser.

Where do results appear?

Check the Output panel for console logs.

Can I switch themes?

Yes—switch between light and dark.

Can I continue later?

Yes—your code stays saved locally.