Software Alternatives & Reviews

CheerpJ VS OpenSilver

Compare CheerpJ VS OpenSilver and see what are their differences

CheerpJ logo CheerpJ

The complete Java runtime for modern browsers. CheerpJ is the only solution that can run any large-scale, unmodified Java applications, applets, or libraries in the browser. No downloads or plugins are required.

OpenSilver logo OpenSilver

Open-source re-implementation of Silverlight on modern browsers using WebAssembly.
Not present

Run Java Applications on Modern Browsers

CheerpJ allows organizations to modernise their Java applications by making them usable from modern browsers, without needing a local JVM installation.

It has extensive compatibility with Java 8*, including file access, networking, clipboard, and many other system features. It is compatible with Java Swing, Oracle Forms, Oracle EBS, and any other framework or library. Other Java versions can be supported according to your needs.

*Tested on Oracle Forms, EBS, Swing, AWT and numerous frameworks and libraries.

Legacy Applications

CheerpJ allows organizations to preserve access to legacy Java applications (Applets, JNLPs, and stand-alone applications) by running them on the browser, without requiring a local JVM installation.

It is compatible with Java Swing, Oracle Forms, EBS, and other third-party frameworks.

With CheerpJ, you can remove the requirement for IE and Java on the client, and upgrade the accessibility and security of your application.

Modernise your Java Application to HTML5

With CheerpJ Organisations with products based on Java can migrate applications to HTML5 or the cloud with minimal or no effort, making them accessible from modern browsers, without a local Java installation.

CheerpJ allows a fully automated, full or partial migration of an existing Java client to a browser-based web application.

Integrate Java libraries into your web application

CheerpJ allows web developers to integrate Java libraries and components in native web applications.

CheerpJ is a browser-side JVM replacement in WebAssembly and supports seamless interoperability with HTML5/JavaScript.

  • OpenSilver Landing page
    Landing page //
    2022-11-18

CheerpJ videos

CheerpJ Demo

OpenSilver videos

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Category Popularity

0-100% (relative to CheerpJ and OpenSilver)
Software Development
100 100%
0% 0
Online Services
40 40%
60% 60
Product Presentation
0 0%
100% 100
Cloud Storage
100 100%
0% 0

User comments

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Social recommendations and mentions

CheerpJ might be a bit more popular than OpenSilver. We know about 14 links to it since March 2021 and only 11 links to OpenSilver. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

CheerpJ mentions (14)

  • I found one of my first programs (Java,2011) on the Wayback Machine and it runs
    If you want to run your applet today, try CherpJ: https://cheerpj.com/ This should be able to run absolutely any Java in the browser. - Source: Hacker News / 4 days ago
  • Phet: Interactive Simulators for Science and Math
    Many of the simulations on this site are Java web applets, kept running thanks to CheerpJ (https://leaningtech.com/cheerpj/). - Source: Hacker News / 7 months ago
  • WCGI: WebAssembly and CGI
    And now you can run a wasm jvm: https://leaningtech.com/cheerpj/ (there are others, too). - Source: Hacker News / about 1 year ago
  • Coffee beans are becoming extinct
    Eh, they should all compile to wasm anyway... Https://leaningtech.com/cheerpj/. Source: about 1 year ago
  • Has anyone tried playing on Android?
    Also, I tried using https://leaningtech.com/cheerpj/ to create a web version of ROTP, but it was quite slow and nobody seemed interested. Source: over 1 year ago
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OpenSilver mentions (11)

  • Revisiting WASM for F#
    I would also say that IF blazor worked on a browser plugin like silverlight did, today that's not the case it is built on the webassembly standard which and it is being adopted in the browsers which means once it gets on the web, it is unlikely to ever go out again. Even if Microsoft themselves leave Blazor today, it can still work, the burden of creating a fork and keeping blazor alive will certainly be big but... - Source: dev.to / 5 months ago
  • Seeking Advice on Product Positioning for new .NET-based SDK/Framework
    Under the Hood: Technically, XR# integrates Three.js, A-Frame.js, and the Microsoft .NET to WASM compiler (like in Blazor). It’s built on our decade-long experience with OpenSilver, a contemporary Silverlight alternative. Source: 8 months ago
  • WASI: A New Kind of System Interface
    Nah, I appreciate the wonderfull work of those WebAssembly people that allowed me to have Java applets, Flash and Silverligh running again in the browser. https://leaningtech.com/cheerpj/ https://leaningtech.com/cheerpx-for-flash/ https://opensilver.net/ Thanks for making the revenge of plugins a reality. - Source: Hacker News / about 2 years ago
  • 20 Years of .NET
    Now there is a company making Silverlight work on top of WebAssembly. https://opensilver.net/. - Source: Hacker News / about 2 years ago
  • Prime Video Uses WebAssembly
    It will definitly be the new common, by killing Flash et all without comparable tooling, while at the same time offering WASM, it was only a matter of time until we had the revenge of plugins. Basically 10 years wasting time to come full circle. https://leaningtech.com/cheerpj https://leaningtech.com/cheerpx-for-flash/ https://opensilver.net/ All of the three major ones are now back, but it is ok, WASM is great! - Source: Hacker News / over 2 years ago
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What are some alternatives?

When comparing CheerpJ and OpenSilver, you can also consider the following products

CheerpX for Flash - its adobe flash player in webassembly

Flash Player 2021 - Want to fix "This plugin is not supported" and "Adobe Flash Player is blocked" error messages? This extension will remove those messages and allow you to play Flash in any website with a single click.

ZK Framework - A highly productive open source Java framework for building amazing enterprise web and mobile applications.

Ruffle - An open source Flash player

Puter - Puter is a cloud operating system. Store, open, and edit your files from anywhere at any time in the cloud.

SuperNova Player - SuperNova Player allows systems to play .SWF files in a standalone player launched from any browser.