HxEdit

SB Hexadecimal Editor is a tool that allows you to view or edit the raw contents of a file in the Windows environment. Editing files is simple, works like most text editors. You can use HxEdit to analyze files, patch ROM files for emulators.

Features: Hex and ASCII displays; Data Explorer to view decoded values; Works with large files; Two synchronous cursors in Hex and ASCII modes; Search ASCII or Hex strings; Count occurences of ASCII or Hex strings; Replace ASCII or Hex strings; Fast Replace All; Copy block to Windows Clipboard; Fill block with data; Wheel mouse support; Simple protect mode from saving changes if just testing; Bookmarks.