The SWF file (short for Shockwave Flash) is a vector graphics file format originally created by Macromedia (which, since 2005, is part of Adobe Systems). SWF files can be created by the Adobe Flash program although there are other applications that also allow it, including free tools such as MTASC or SWFTools.
SWFs are usually executed on the browser through a plugin called Adobe Flash Player, although they can also be adapted to run autonomously. We could define it, roughly, as a vector format although it also supports bitmaps, with animation possibilities, and also supports programming using the actionscript language. These SWF files are usually small enough to be published on the World Wide Web in the form of animations or applets with various functions and degrees of interactivity. But if we also want to play them in offline mode, we can do it with the help of a player like Sencesa Flash Player.
If you are simply looking for a simple flash file player without any extra ornaments or complicated tools, then Sencesa Flash Player 2.0 is a good alternative because it is a simple, manageable, small and practical SWF flash file player with the basic options you should have a player: volume control, searches, size to watch the flash movie, preview of the file to be played just by selecting it in the browser, etc.
You can free download Sencesa Flash Player 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.