In computing, bit twiddler may refer to: A piece of source code that does bit twiddling, which may mean: Doing bit manipulation; Interacting with computer hardware, especially when using a bit-banging technique; Reading or writing binary file formats; or Being unnecessarily complex, perhaps due to premature optimization A programmer who writes bit twiddlers, as described above A hacker, an enthusiast or a programmer with profound understanding of the fundamentals of computer operation A hex editor, a software application that allows the manipulation of binary computer files