Browser extension

The JDoodle extension puts the editor in a panel beside whatever you are reading. Select a code snippet on a page, run it, and read the output without opening a new tab.

It works on any page: documentation, a blog post, a Stack Overflow answer, an email, or a reply from an AI assistant.

The extension is free. You need a JDoodle account to sign in to it, and that is free too.

What you can do with it

• Run a snippet where you found it. Select the code, right click, and choose Execute with JDoodle.
• Write in the panel. Type or paste code straight into it, the same as the editor on the site.
• Choose the language and version. Both are dropdowns in the panel.
• Keep your execution history. Every run is saved to your account while you are signed in.

How it compares to the site

The extension is for short pieces of code you meet while reading. It runs one snippet at a time.

Anything longer belongs in the IDE, which has projects, multiple files, libraries and sharing. The extension has none of those, by design.

What next

• Install the extension and sign in.
• Run code, both ways.