FP3 is a development file used for storing user’s custom settings. FP3 format can be implemented in various applications and environments. FP3 files are typically used in business applications which make use of databases or larger data sets.

FP3 files are created by FileMaker Pro software application. The program automatically opens FP3 files when FileMaker server service is started. FileMaker license cost depends on the number of unique users that will have access to the application.