What Is an SWF File?
These animation files have a history of being used for online games played within a web internet tool.
Adobe hasofficially discontinued Flash, meaning it’s no longer being developed or supported.

Other web technologies, such as HTML5 video support and CSS3 animations, have largely replaced SWF.
SWF is short forSmall Web Formatbut is also sometimes called aShockwave Flashfile.
That said, you might have luck usingXilisoft SWF Converter.
For an embedded SWF file, right-smack the page containing the file and selectView page source.