There are no Divinity-specific hex editors (though
iZakaroN's SaveEditor is basically a specific purpose, limited function hex editor). Using a hex editor to edit the data.000 file is similar to using a text editor to write a letter. In binary files, rather than having the familiar characters and numbers, data is in the hex format, so consists of the numbers 0-9 and letters A-F. The data is in pairs of digits, so the values can go up to FF, or 255 in decimal format.
HHD HexEditor
