FLA is a file extension associated with Adobe Flash technology. FLA files store sets of information used by Flash animations.FLA files contain scripts and libraries, as well as graphics, audio, and text resources.

It is worth mentioning that FLA files are only project files used in development context and need to be compiled into a SW files. The compilation can be made using Adobe Flash or Adobe Animate CC tools. FLA files can store projects for banners, simple animations, movies, or websites.