HxD is a freeware editor supporting disk, memory, and file hex editing, as well as a secure file deletion tool (called a “file shredder” by HxD). HxD’s webpage states the app works on every Windows OS ...

Hexty, an iOS (iPad and iPhone) app provides a simple user interface to understanding hexadecimal to binary number conversion by representing the bits as check buttons. It is useful for programming ...

I've been using Hex Fiend, and while pretty good and FOSS, it still lacks in some of the above (especially in UI). Looked at Synalyze It! and while it looks pretty much perfect with some nifty syntax ...

Get a hex editor that allows you to view a file in binary? That would be the most obvious solution. There are scores of freeware and shareware hex editors out there.