Looking for a hex comparison tool

[MDesigner]

I'm analyzing a particular file format, and it would be handy to have a tool to do a side-by-side comparison (in hex) and highlight the differences. This way, I can have a certain file.. make a copy, make changes (via an editor, or game, whatever), and then compare in hex and easily see what changed.

Anything like this? Thanks!

 

[kranky]

This looks like a good fit.

 

[MDesigner]

Thanks. It's 30-day trialware though... any freeware apps?

 

[kranky]

OK, what about this?

 

[Need4Speed]

ultraedit maybe?

 

[MDesigner]

UltraEdit, also not free..but the comparison tool on that one was bad. HexCmp rocks.. I guess I'll just have to pay for it