KSFL is a library and command-line tool for reading and writing various structured binary file formats, including: Mac OS resources (.rsrc), Palm OS resource database (.prc), Windows Portable Executable (.exe, .dll, etc.), DFF File Format (.dff) (versions 1.0, 2.0.1, 3.0), IFF, RIFF, MIDI, PNG, ICNS, and HyperCard stacks.

KSFL is currently available for Java. Other languages are planned for future development.