Inspect and edit any file, main memory, disk, or disk image.
HxD Hex Editor Portable focuses on a simple and task-oriented operation; as such functions were streamlined to hide differences that are purely technical. It offers features such as searching and replacing, exporting, checksums/digests, insertion of byte patterns, a file shredder, concatenation or splitting of files, and statistics. It features insertion of byte patterns; modified data is highlighted, exporting of data to several formats, view data in Ansi, DOS, EBCDIC and Macintosh character sets, and ficker free display and fast drawing.
Don't let the fact that it's a few years old fool you. I've tried a lot of different hex editors and this one comes out on top of the freeware editions.
Cons
None as far as I'm concerned.
Summary
If you're in search of a great hex editor, then you have nothing to lose by trying this great piece of freeware.