HexEdit

HexEdit screenshots

HexEdit 3.3 is a simple but feature full hex editor to modify binary files
Start Window
HexEdit 3.3 : Start Window

Alternative downloads

CI Hex Viewer
View and edit low-level data from your disk, files or partitions.
1.3
FREE
Hex Insight
Professional hex and structure editor for viewing and editing binary files.
1.1
Free Hex Editor
HHD Software Hex Editor is a powerful hex and binary code data editing program.
FREE