CheerpJ for e-commerce and retail

CheerpJ runs retail Java applications in the browser, from store and warehouse systems to head-office tools. The applications stay as they are, and store and office PCs need only a browser.

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Retailers we work with

The Java applications CheerpJ runs in retail

CheerpJ is a complete Java runtime, built from OpenJDK and compiled to WebAssembly. It runs your compiled applications as they are, including third-party and obfuscated code, on Java 8, 11, 17 and 21, with Java 25 in preview.

That includes Oracle applications with Java clients, such as Oracle Retail Price Management, Oracle Retail Store Inventory Management and Oracle E-Business Suite, as well as other vendors’ applications and the ones your own developers built.

Applets

Head-office and supplier tools built as applets run in modern browsers again.

Java Web Start applications

Store inventory and back-office clients launched through Java Web Start open from a browser tab.

Desktop applications

Swing and AWT applications for merchandising, buying and finance run in the browser as they are.

Java libraries

Pricing and promotion code written in Java can be called from JavaScript in your web applications.

What works in the browser

Files

Users upload files to the application, and files it saves arrive as browser downloads.

Printing

The application prints through the browser.

Copy and paste

Copy and paste work inside the application, and with other applications when you turn it on.

Networking

HTTP requests go through the browser. TCP and UDP connections go through Tailscale, with the control server on your own network.

Windows and keyboard

Applications keep their multiple windows, and their keyboard shortcuts pass through the browser.

Audio

Applications play sound through the browser.

For your security review

The browser sandbox

The application runs inside the browser’s sandbox, under the same security model as your other web applications, and reaches files and the network only through browser APIs and their permissions.

Hosted on your own servers

CheerpJ is a set of static files you host on your own web servers, including on segregated and air-gapped networks.

Updates from one place

You update CheerpJ and the application on your servers, and staff get the new version the next time they open it.

Licences activated offline

The browser extensions take a licence token that activates offline, so a deployment can stay entirely inside your network.

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Tell us about the application, where it runs and who uses it, and we’ll help you plan an evaluation.

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Try the extensions

The CheerpJ browser extensions let you try your applications in Chrome or Edge.

Get the browser extensions

Build with Java for the browser.

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