CheerpJ Applet Runner

Run Java applets without installing Java

▶

CheerpJ Applet Runner - Run Java Applets Easily

"CheerpJ Applet Runner" is a Chrome extension that allows users to run legacy Java Applets in modern browsers without needing a Java installation. It converts applets to WebAssembly and JavaScript on the fly, providing a seamless experience that is fully client-side, secure, and private. Developed by Leaning Technologies, it is suitable for non-business use on public networks, ensuring that all data remains within your browser. For internal or business use, licensing options are available.

Download

Extension stats

By: https://cheerpj.com

Users: 100,000+

Rating: 4.52

(268)

Version: 2025.3 (Last updated: 2025-03-06)

Creation date: 2020-02-06

Permissions:

scripting
activeTab
storage
declarativeNetRequestWithHostAccess

Size: 128.97M

Email: in*****@leaningtech.com

URLs: Website ,Privacy policy

Full description: See detailed description

Ranking

# 1,772 ▲ 90

Other rankings

#9825 in Workflow & Planning ▲ 100

#119 in plugin keyword 27 ▲ 43

#132 in install keyword 22 ▲ 44

#185 in chrome browser keyword 12 ▲ 86

#210 in details keyword 14 ▲ 76

Upgrade to see more rankings

Other platforms

Not available on Android

Not available on Firefox

CheerpJ Applet Runner (v2024.10)

32,425+ 3.70

(18)

User reviews

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 Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.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 usage of Java applets in modern browsers
Resolves issues with legacy devices that require applet interfaces
Effective performance for many Java applets
Simplicity and effectiveness in handling applets
Restores access to previously inaccessible Java-based applications

Cons

Does not work on all applet-based websites
Performance can be slow at times
Some applets, especially those using OpenGL, may not function correctly
Issues when opening second windows from original applets
Inconsistent behavior with certain Java applets

Most mentioned

Functionality with legacy Java applet websites
Performance issues
Compatibility problems with specific applets
Restore access to Java applications

User reviews

sa ne marche même moi qui pensé avoir un bon applet...

nicolas fagot, 2025-02-25

Muito prático!

Marcelo Alcantara, 2025-02-06

Excellent!

Geo Man, 2025-02-02

View all user reviews

Extension safety

Risk impact

CheerpJ Applet Runner does not require any sensitive permissions.

Risk impact analysis details

Low Request access to the following domains:

Risk likelihood

We don't have sufficient data to confidently determine the risk likelihood of CheerpJ Applet Runner. Use it at your own risk.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
Good **** ********* *** **** **** *******

Upgrade to see full risk analysis details