: You can download a single desktop executable for Windows, macOS, or Linux that requires no installation.
: It aims for high compatibility with modern Flash APIs (covering about 83% as of recent reports) and can run as a fallback when Ruffle struggles with complex logic. Source : lightspark/lightspark on GitHub. 3. FlashArch SWF Player swf player github portable
For niche use cases, these GitHub projects provide additional portable options: JPEXS Free Flash Decompiler - GitHub : You can download a single desktop executable