1 From the store
Install from the store
Install the extensions from the Chrome Web Store or Edge Add-ons. They run in Chrome, Edge and other Chromium browsers.
CheerpJ extensions
Two browser extensions, one for Java applets and one for Java Web Start applications. You run the application in the browser tab, from the pages you already use, and the application and its server stay as they are.
Check how your application launches
The CheerpJ browser extensions have 170,000+ users together. They run Java 8 applications with their Swing and AWT interfaces, and support networking, files and the clipboard through the browser.
-
Embedded in a web page
If your application runs inside a web page, through an <applet> tag, you need the extension for applets. It runs the applet in place, on the page where it’s always been, entirely in the browser, with nothing on a server.
-
Downloaded as a .jnlp file, or through Java Web Start
If you load your application by downloading a .jnlp file, or through Java Web Start, you need the extension for Java Web Start. It runs the application in the browser, in place of the Java Web Start client that Oracle removed from Java 11, and has been tested on Oracle E-Business Suite, Oracle Forms and hundreds of custom Java client applications.
-
As a desktop application
If your Java application runs natively, launching as a desktop application, you need CheerpJ on your own web server.
Installing the extensions
For Java Web Start
Chrome Web Store Edge Add-ons Read more about running Java Web Start applications
Licensing
Free for personal use and technical evaluation. Desktop licences cover business use, bought online for up to 20 desktops. Enterprise licences, for larger deployments, need no licence server: contact sales.
For your security review
The browser sandbox
The application runs inside the browser’s sandbox, as a web page does, and reaches files and the network through browser APIs.
Files move by upload and download
Users upload files with a button in CheerpJ’s title bar, and files from the application arrive as browser downloads.
No server contact for Enterprise
Enterprise deployments don’t contact any server at all: the licence is set by policy and activates offline, and the self-hosted version runs on your own network.
Java leaves staff computers
With applets and Java Web Start applications in the browser, desktop administrators can take Java 8 off staff computers.
Deploying the extensions
Case study ~75% fewer Java-related vulnerabilities in its Rapid7 scores
CF Fertilisers runs Oracle E-Business Suite 12.1.3, which launched as an applet in IE mode on Java 8u311. It removed Java from all user computers at its UK and US sites, deploying CheerpJ through Group Policy and Intune from a custom store we host. Users reported faster logins.
Rated 4.6 out of 5 on the Chrome Web Store
4.6
Read the reviews on the Chrome Web Store
★★★★★★★★★★ 286 ratings
A superb extension with great customer support! We have an large, extensive applet that displays automated weather reports from commercial aircraft-- that is used by weather services world-wide. You can see it at https://amdar.noaa.gov/demo_java/. Thanks to CheerpJ we can now run it again in a browser (chrome). The CheerpJ version is FAST -- able to display 800,000+ wind barbs in just a couple of seconds. In addition, the developers were able to quickly update the app to allow some obscure…
1 of 100
Get started
Talk to us
Tell us how your applications launch and how many people use them, and we’ll help you plan a deployment.
Talk to usTry the extensions
The CheerpJ browser extensions let you try your applications in Chrome or Edge.
Get the browser extensions