A very simple FileHandler which allows to directly edit the binary data of arbitrary files.
It opens the file for direct read and write access and displays a hex dump of the currently visible data. Scrolling in the GUI will immediately locate the corresponding section of the underlying file and display its contents at that position. Editing a byte in the GUI will write the changed value to disk as soon as the value is committed (e.g. the editing control loses its keyboard focus, which happens by pressing Tab or Enter while editing).
There exists no possibility for any form of undo or discarding changes!
Please note that most (binary) files can very easily get corrupted by editing them with this tool. This is for experienced users which know exactly what they are doing.