CheerpJ Applet Runner icon

CheerpJ Applet Runner

by Leaning Technologies Limited · cheerpj.com · Workflow & Planning
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Run Java applets without installing Java

Users
100K
0 in 30 days
Rating
4.6 / 5
+0.10 in 30 days
Ratings
286
+1 in 30 days
Store rank
#1,808
#1,580 among extensions
Version
2026.9
updated 9 Sep 2026

Users

monthly, 3 years
20K60K100KAug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 100,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
70178286Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 286 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About CheerpJ Applet Runner

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.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%+1+0.10
30 days0+0.0%+1+0.10
6 months0+0.0%+6+0.10
1 year0+0.0%+9+0.11

Version history

22 versions recorded
2026.926 Aug 2026
2026.62 Jun 2026
2026.514 May 2026
2026.311 Mar 2026
2025.1126 Nov 2025
2025.9.34 Oct 2025
2025.9.217 Sep 2025
2025.9.131 Aug 2025

Details

Category
Workflow & Planning
First seen
6 Feb 2020
Size
121.0 MB
Languages
en
Pricing
Free
Privacy policy
cheerpj.com
Support
github.com
Extension ID
bbmolahhldcbngedljfadjlognfaaein

Permissions and risk

Minimal riskimpact 0, likelihood 1
Permissions
scriptingactiveTabstoragedeclarativeNetRequestWithHostAccessalarms

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