Item logo image for CheerpJ JNLP Runner

CheerpJ JNLP Runner

3.0(

8 ratings

)
ExtensionTools6,000 users
Item media 4 (screenshot) for CheerpJ JNLP Runner
Item media 1 (screenshot) for CheerpJ JNLP Runner
Item media 2 (screenshot) for CheerpJ JNLP Runner
Item media 3 (screenshot) for CheerpJ JNLP Runner
Item media 4 (screenshot) for CheerpJ JNLP Runner
Item media 1 (screenshot) for CheerpJ JNLP Runner
Item media 1 (screenshot) for CheerpJ JNLP Runner
Item media 2 (screenshot) for CheerpJ JNLP Runner
Item media 3 (screenshot) for CheerpJ JNLP Runner
Item media 4 (screenshot) for CheerpJ JNLP Runner

Overview

Run Java Web Start Applications without Java

CheerpJ JNLP Runner - Run Java Web Start applications without installing Java 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

Details

  • Version
    2026.8
  • Updated
    July 31, 2026
  • Features
    Offers in-app purchases
  • Offered by
    Leaning Technologies Ltd
  • Size
    121MiB
  • Languages
    English
  • Developer
    Leaning Technologies Limited
    3rd Floor, 207 Regent Street London W1B 3HH GB
    Email
    info@leaningtech.com
    Phone
    +44 7754 845539
  • Trader
    This developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.
  • D-U-N-S
    218604744

Privacy

Manage extensions and learn how they're being used in your organization

CheerpJ JNLP Runner has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

CheerpJ JNLP Runner handles the following:

Personally identifiable information

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, visit the developer's support site

Google apps