CheerpJ Applet Runner

Leaning Technologies

(18)

‪30,000+‬ Users
Productivity
Leaning Technologies

(18)

‪30,000+‬ Users
Productivity

This extension cannot be installed as it is not compatible with your browser version Incompatible with your browser

Description

CheerpJ Applet Runner - Run Java applets without installing Java

With the CheerpJ Applet Runner extension, you can run legacy Java Applets on modern browsers without a Java plugin or a Java installation.

Using the CheerpJ Applet Runner is simple. Just install and pin the extension. Next, visit your Applet-based website, click the extension icon in the upper-right corner of your browser, and then press the 'Enable' button in the popup. Once enabled, the extension is activated for the current domain, and Applets will start automatically if they are present.

This extension works by 'converting' the Java Applet to WebAssembly and JavaScript on the fly. It is private and secure, runs fully client-side (i.e. it does not contact any server), and does not collect any data or analytics at all. All your data, as well as your application are kept within the boundaries of your browser.

This extension, developed by Leaning Technologies, is based on CheerpJ, a JVM/JRE replacement for modern browsers. More information on CheerpJ are available at https://www.cheerpj.com.

This software is free to use for non-business purposes on public-network Applets. For any other use, such as internal network applets, or if you are a company or public-sector organisation and would like to license CheerpJ, please get in touch with sales@leaningtech.com.

User reviews

R

Apr 7, 2024
Doesn't work at all. Acts like it's going to start the applet, but never actually does.

Jerry

Aug 27, 2023
Constantly hangs, have to reload the page and applet to regain control.

Bill

Dec 22, 2022
I wish we didn't have to click on the icon for every page we open. For the life of me I cannot understand why it has other options in the "Can open and change (etc)" yet only the "On click" can be chosen from those options. Other options are grayed out. Kind of defeats the purpose for having options in the first place. Nice to be able to view applets again, for sure, but this click stuff is a nuisance.
Details
Version 2025.4Updated March 24, 2025Report abuse
Details
Version 2025.4Updated March 24, 2025Report abuse