No bvi installed? Give this a spin:

home | blog | Teh Internet | guest blog |rants | placeholder | political | projects | Gwen and Liam | Citadel patched | Tools | Scouts

- Careful Chrome users, this search box might be "Not secure"

Good tip for showing hex from within vi. Thanks YorkshireKev!
In case that goes away, just stream with xxd to display hex:

Off again with:
:%!xxd -r

If you are more of a GUI fan, and want to install one without many dependencies, give Jeex a try:
P.S. Thanks Great site for tips and tools.