I have had a look through the plugins as well as searched the forum for Notepad++ and have not seen a solution to editing data as hex in Notepad++.
I am after the same kind of functionality that UltraEdit offers (see the screenshot below) where you can edit the document either directly or via entering new hex characters.
ベストアンサー1
There is an old plugin called HEX Editor here.
According to this question on Super User it does not work on newer versions of Notepad++ and might have some stability issues, but it still could be useful depending on your needs.