From Canadian Mind Products
Encoding Recogniser will help you determine what encoding was used to write a file by displaying the file in hex or and decoded characters in any of the encodings supported by Java.
This program runs under any OS, (e.g. Win2K/XP/Vista/OSX/Linux/Solaris/Vista64/AIX...) so long as you have Java version 1.5 or later installed.
To install, Extract the zip download with WinZip (or similar unzip utility) into any directory you please, often C: -- ticking off the (user
folder names) option.
To run as an application, type:
java -jar E:commindprodencodingrecognizerencodingrecogniser.jar
adjusting as necessary to account for where the jar file is.