img2swf is a server application that converts a range of image formats to swf at runtime making it possible to dynamically load them into Flash via loadMovie.

Since the introduction of Flash MX it's been possible to load jpg's dynamically from a server into a Flash movie at runtime. However, it has only been possible to load either swf files or "non-progressive" jpg's.

Simply by appending the URL of the img2swf server application to the front of an image URL it is possible to load the following formats directly into Flash from anywhere on the web;
* gif (both static, animated** and transparent)
* png (with transparency)
* jpg (both progressive and non-progressive)
* bmp
* tiff
* ico