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Lightspark
Developer	Alessandro Pignotti
Stable release	0.9.0[1] / February 16, 2025 (2025-02-16)
Written in	C++
Operating system	Linux, FreeBSD, Windows
Platform	IA-32, x86-64
Size	21 MiB (Win32), 22.8 MiB (Win64)
Available in	English
Type	Multimedia
License	LGPLv3
Website	lightspark.github.io
Repository	github.com/lightspark/lightspark

Lightspark is a free and open-source Adobe Flash (SWF) player released under the terms of the GNU Lesser General Public License (LGPL) version 3.

Lightspark supports most of ActionScript 3.0 and has an NPAPI plug-in.^[2] Though it has some support for it, it will fall back on Gnash, a free SWF player, on ActionScript 1.0 and 2.0 (AVM1) code.

Lightspark supports OpenGL-based rendering and uses OpenGL shaders (GLSL). The player is compatible with H.264 Flash Videos such as those on YouTube.

The Lightspark player is completely portable.^[3] It has been successfully built on Ubuntu 11.04 (Natty Narwhal) on PowerPC, x86, ARM and AMD64 architectures.^[4] Lightspark has a Win32 branch for Microsoft Visual Studio^[5] and introduced a Mozilla-compatible plug-in for Windows in version 0.5.3.

• Mozilla Shumway
• Ruffle

• Willis, Nathan (2012-11-21). "Gnash, Lightspark, and Shumway". LWN.net. Archived from the original on 2013-03-30. Retrieved 2014-06-13.

• Official website
• Developer's blog
• lightspark on GitHub
• Lightspark at Launchpad
• Lightspark on SourceForge