CheerpJ JNLP Runner icon

CheerpJ JNLP Runner

by Leaning Technologies Limited · Tools
Manifest V3 in_app
View in Chrome Web Store Data as of 15 Oct 2026

Run Java Web Start Applications without Java

Users
6,000
0 in 30 days
Rating
3.0 / 5
unchanged in 30 days
Ratings
8
0 in 30 days
Store rank
#13K
#11K among extensions
Version
2026.9
updated 9 Sep 2026

Users

monthly, 3 years
03,0006,000Mar 2024Jul 2025Oct 2026
Latest, 15 Oct 2026: 6,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
048Mar 2024Jul 2025Oct 2026
Latest, 15 Oct 2026: 8 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 JNLP Runner

Run Java Web Start applications without installing Java with CheerpJ JNLP Runner. With the CheerpJ JNLP Runner extension, you can run Java Web Start (JWS) applications on modern browsers without a local Java Desktop installation. JNLP files are XML files that are used to run legacy Java Applications over the network, using the Java Web Start launcher, which usually comes with some distributions of Java. This browser extension, based on the CheerpJ technology, is designed to replace the local Java Desktop installation, and run Java Web Start applications within the browser, without a Java installation. The extension is designed to be simple and easy to use. Once installed, navigate to the website hosting the JNLP file and click it to download as you normally would, the JNLPRunner extension will automatically detect and launch the Java application directly in the browser, no extra steps needed. A side panel will appear on the left side of the screen, giving you quick access to settings, file uploads, and license management. You can also upload or drop a local JNLP file into the extension popup to launch it directly, in case the extension fails to detect the download. The extension 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 is available at https://cheerpj.com

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months+1,000+20.0%+1−0.29
1 year+2,000+50.0%+40.00

Version history

15 versions recorded
2026.926 Aug 2026
2026.831 Jul 2026
2026.62 Jun 2026
2026.516 May 2026
2025.1221 Dec 2025
2025.929 Aug 2025
2025.728 Jun 2025
2025.4.19 Apr 2025

Details

Category
Tools
First seen
12 Mar 2024
Size
121.0 MB
Languages
en
Pricing
in_app
Privacy policy
cheerpj.com
Support
github.com
Extension ID
achnhggjjhnadfapkmgallnbmemdojdi

Permissions and risk

Moderate riskimpact 1, likelihood 3
Permissions
downloadsstorage

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