• No local Java installation
  • No applet source-code changes
  • Chrome and Edge support
Install the extension

From installation to running your applet

Once you enable the extension, it runs the page’s applets with the CheerpJ runtime, directly in the browser.

  1. Install the extension. Add CheerpJ Applet Runner to Chrome or Microsoft Edge.
  2. Open your application. Visit the existing webpage containing the Java Applet you need to access.
  3. Run it in the browser. Click the extension’s icon and enable the Applet Runner in its popup. It starts CheerpJ and loads the applet without a local Java installation.

Keep using the Java applications you already have

Restore access to existing Java Applets without maintaining an old browser environment on every desktop.

  • No Java Desktop. Run Java Applets without installing and maintaining a local JRE on each user device.
  • Modern browsers. Access existing applets through Google Chrome and Microsoft Edge.
  • No source-code changes. Continue using existing Java Applets without rebuilding them as HTML or JavaScript applications.
  • Runs in the browser. CheerpJ runs the applet inside the browser without relying on a legacy Java browser plugin.

Which licence applies to you?

Install the extension to evaluate it, then choose the licence that matches how and where the applet is used.

Personal use or technical evaluation

For non-business personal use with publicly accessible applets, or for testing Applet Runner before purchase.

  • Personal non-business use
  • Publicly accessible applets
  • Technical evaluation

Install the extension

Business use on up to 20 desktops

For individuals and small teams who need to access a business, internal or organisation-owned Java Applet.

  • Business and commercial use
  • Internal applications
  • Licensed per desktop, monthly

View Desktop licence

Managed enterprise deployment

For organisations with more than 20 desktops, or that need central deployment, self-hosting, support or custom configuration.

  • Chrome and Edge policy deployment
  • Self-hosted extension packages
  • An optional support agreement

Get started

Before you install

Do I need Java installed on my computer?

No. CheerpJ Applet Runner does not require a local Java installation or a legacy Java browser plugin.

Which browsers are supported?

Applet Runner supports Google Chrome and Microsoft Edge.

Do I need to modify the existing applet?

Applet Runner is designed to load existing Java Applets without requiring source-code changes or a rewrite to HTML or JavaScript.

Can my organisation deploy it centrally?

Yes. Enterprise licensing supports managed browser deployment, self-hosted extension packages and custom configurations. Contact the CheerpJ team to discuss your requirements.

Where can I find the documentation?

See the CheerpJ Applet Runner documentation for installation and configuration guidance.

Ready to open your Java Applet?

Add CheerpJ Applet Runner to Chrome or Edge and return to the application you need to access.

Install the extension

Need central deployment or self-hosting? Speak to the enterprise team.