Rehex – Reverse Engineers' Hex Editor
I strongly recommend checking out 010 Editor [1].<p>It's very powerful, lets you display in multiple different formats (not just 1/2/4/8 bytes, but interlaced formats and byte-arrays) and has the most amazing templating / scripting engine I've seen for this type of tool.<p>The only caveat is that it isn't free, but if this is something you do for a living (as I do) it's an indispensable tool for exploring file formats and other binary data sources.<p>[1]: <a href="https://www.sweetscape.com/010editor/" rel="nofollow">https://www.sweetscape.com/010editor/</a>