> Which hex editor shows a line of hex with the corresponding ASCII under the > line of hex ?
I suspect that it shouldn't be too hard to get something working if you start from nhexl-mode in Emacs: E.g. from XXXX XXXX XXXX XXXX XXXX XXXX XXXX XXXX abcdefghabcdefgh you can go to XXXX XXXX XXXX XXXX XXXX XXXX XXXX XXXX abcdefghabcdefgh by simply adding an LF char. Then you can drop the separating spaces (e.g. by setting nhexl-group-size appropriately): XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX abcdefghabcdefgh and finally add an overlay-with-after-string to every char to spread the text XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX a b c d e f g h a b c d e f g h > shed is the closest so far with the hex in a column down the page and the > corresponding ASCII etc next to it. Not sure what you mean, but this sounds like "the standard" approach, as used in Emacs's original hexl-mode and my nhexl-mode replacement (similar to the output of `od -t xz`). Stefan