The SWF file format delivers vector graphics, text, video, and sound over the Internet and is supported by Adobe® Flash® Player and Adobe AIR™ software. Flash Player already reaches over 98% of Internet-enabled desktops and more than half a billion handsets and mobile devices.
The SWF file format is designed to be an efficient binary delivery format, not a format for exchanging graphics between graphics editors.
The SWF file format is available as an open specification to create products and technology that implement the specification. SWF 9 introduces the ActionScript™ 3.0 language and virtual machine.
Download the SWF file format specification (PDF, 1.9 MB)