
CodePen
replit
JSFiddle
GitHub
StackBlitz
VS Code
JS Bin
Online playground for React

Flash Player 2021
SuperNova Player
X (Twitter)
Newgrounds Player
CheerpX for Flash
Ruffle
Gnash
Open-source re-implementation of Silverlight on modern browsers using WebAssembly.

Which is more popular?
Based on our record, CodeSandbox seems to be a lot more popular than OpenSilver. While we know about 313 links to CodeSandbox, we've tracked only 13 mentions of OpenSilver.
Website, pricing, platforms and company facts side by side.
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| Website | codesandbox.io | opensilver.net |
| Pricing | — | |
| Company | Startup from The Netherlands · 1 - 9 employees · 2017 | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of OpenSilver yet.
Walkthroughs and reviews on video.
A browser IDE that's actually GOOD? (CodeSandbox.io Review!)
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodeSandbox and OpenSilver. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codesandbox is an online code editor and prototyping tool that makes creating and sharing web apps faster. Codesandbox: Online code editor and ide for rapid web development.
CodeSandbox can be thought of as a much more powerful and complete take on JSFiddle. True to its name, CodeSandbox provides a complete code editor experience and a sandboxed environment for front-end development.
We have no reviews of OpenSilver yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


To begin, you can start creating your own react app using the command line or can directly go to CodeSandbox if you want to skip using the command line which is faster. CodeSandbox is an online code editor and prototype tool that speeds... - Source: dev.to / 4 months ago
To begin, you can create a react app using the command line or any code editor (e.g., VSCode). You can also try using CodeSandbox as an online code editor that is simple to use and allows you to deploy your code. - Source: dev.to / 4 months ago
If you are in a rush to open unknown repos, use GitHub Codespaces or codesandbox with Copilot or another AI integration to analyze the repo for malicious intent and to run it in a safe environment. - Source: dev.to / 10 months ago
- XAML autocompletion, AI error fixing, split editor views The visual designer is the differentiator: 100+ drag-and-drop controls for building UIs. But the NuGet and sharing features work even if you ignore the designer entirely and just... - Source: Hacker News / 7 months ago
Beside already mentioned, there is OpenSilver[1]. Supports Silvelight and WPF. Renders to DOM+WASM. They are also planning support for MAUI. [1] https://opensilver.net/. - Source: Hacker News / 10 months ago
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... - Source: dev.to / over 2 years ago
When comparing CodeSandbox and OpenSilver, you can also consider the following products.


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.
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Code, create, andlearn together. Use our free, collaborative, in-browser IDE to code in 50+ languages — without spending a second on setup.
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SuperNova Player allows systems to play .SWF files in a standalone player launched from any browser.
Compare SuperNova Player to CodeSandbox or OpenSilver:

Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Compare JSFiddle to CodeSandbox or OpenSilver:

Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Compare X (Twitter) to CodeSandbox or OpenSilver: