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Ruffle
Flash Player 2021
SuperNova Player
Newgrounds Player
CheerpX for Flash
OpenSilver
Gnash
The Lightspark project

Which is more popular?
Based on our record, Lightspark seems to be more popular. It has been mentioned 9 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | githubtree.mgks.dev | lightspark.github.io |
| Pricing | — | |
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What each product offers, as listed by its team.


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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 Lightspark yet.
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using GitHubTree and Lightspark. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking GitHubTree since Mar 2025.
Not the first attempted Flash reimplementation[1,2,3]. The GNU one didn’t work all that well back in the day as far as I remember, but then Flash was a moving target at the time. [1]: https://www.gnu.org/software/gnash/ [2]:... - Source: Hacker News / over 3 years ago
A true emulator would be something like Ruffle or Lightspark. Ruffle I know doesn't work well with Walfas last time I checked. I don't know about Lightspark. Source: about 4 years ago
Lightspark, a browser plugin written in C++. It's a work in progress, not every flash content will work. Modern mainstream browsers don't support running it within a page, so flash content needs to be run in a standalone lightspark app,... Source: about 4 years ago
When comparing GitHubTree and Lightspark, you can also consider the following products.

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GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
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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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Enter user/repo and see the project visually
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SuperNova Player allows systems to play .SWF files in a standalone player launched from any browser.
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