FileAlyzer is a free utility which integrates into well into the the properties window of the Windows explorer and gives detailed information of any file. FileAlyzer allows a basic analysis of files by showing file properties and file contents in hex dump form and is able to interpret common file contents like resources structures like text, graphics, HTML, media etc.
FileAlyzer adds lots of tabs to the Windows property menu giving detailed information about the file before even opening it. Another good feature is that it can preview contents of compressed file like zip, rar etc.
It supports many other languages and the application is available for all version of Windows starting from Win 95 to Vista. If you do not want too many tabs in the property window, you can try out the Lite version which has less features compared to the full version.