CheerpJ Applet Runner

CheerpJ Applet Runner

Run Java applets without installing Java

What is CheerpJ Applet Runner?
The 'CheerpJ Applet Runner' is a chrome extension that easily enables the running of legacy Java Applets on modern browsers without the need for a Java plugin or a local Java installation. It converts the Java Applet to WebAssembly and JavaScript securely and privately. Developed by Leaning Technologies, its use is free for non-commercial purposes on public-network applets.
Merlin
Stats
Users: 100,000+
Rating: 4.53 (243)
Version: 10.6 (Last updated: 2023-02-09)
Creation date: 2020-02-06
Risk impact: Very low risk impact
Risk likelihood: Low risk likelihood
Manifest version: 3
Permissions:
  • scripting
  • activeTab
Size: 81.51M
Stats date:

Other platforms

Not available on Firefox
CheerpJ Applet Runner
CheerpJ Applet Runner (v10.6)
3.60 (16) 35,958+
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Merlin
Summary

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 local installation of Java.

Using The CheerpJ Applet Runner is simple. Install the extension, visit your Applet-based website, and enable the extension by clicking on its icon on the upper right corner of your browser!

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 professional Java to HTML5 compiler. More information on CheerpJ are available at https://leaningtech.com/cheerpj/

This software is free to use for non-commercial 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 [email protected].

User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Allows old Java applets to run in modern browsers
  • Easy to use and effective
  • Great for accessing old appliances with Java interfaces
Cons
  • Some applets do not work
  • Need to explicitly enable CheerpJ for each page with an applet
  • Issues with running lwjgl applets
Most mentioned
  • Some Java Applet works and others don't
  • Report sent to resolve problems
  • Works well with old appliances and interfaces
  • Does not work with certain specific applets
Recent reviews
I use this Plugin to program our HPE Switches and some other Network devices and it is working great!
by NewZo NewZo, 2024-04-23

Nice but some of the applets I want don't work (maybe because they use opengl?)
by Sky Sky, 2024-04-04

lort
by Rasmus Hermansen Rasmus Hermansen, 2023-01-17
View all user reviews
Safety
Risk impact

CheerpJ Applet Runner is safe to use. It does not request any sensitive permissions.

Risk likelihood

CheerpJ Applet Runner has earned a fairly good reputation and likely can be trusted.

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Screenshots
Promo images
CheerpJ Applet Runner small promo image
Small promo image
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