CheerpJ for defence

CheerpJ runs Java engineering and mission-support software in the browser, from a runtime hosted on your own network, including air-gapped networks. The applications stay as they are, and Java comes off the desktops that use them.

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Defence and aerospace organisations we work with

The Java applications CheerpJ runs in defence

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 Forms, Oracle E-Business Suite and the Agile PLM Java Client, as well as other vendors’ applications and the ones your own developers built.

Applets

Mission-support and logistics tools built as applets run in modern browsers on approved desktops.

Java Web Start applications

Engineering and planning clients launched through Java Web Start open from a browser tab.

Desktop applications

Swing and AWT engineering tools, including those built for Java 17 and 21, run in any approved browser.

Java libraries

Analysis and conversion code written in Java can be called from JavaScript in your own web tools.

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

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.

Licences activated offline

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

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.

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.

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Talk to us

Tell us what you can about the application, such as its Java version and user interface toolkit, 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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