.PIZ File Extension
File TypeZipped File
This file is saved in a zipped format. You can view the contents by unzipping it with a file decompression program.
Compressed .ZIP archive that has been renamed with the extension reversed; sometimes used for sending zipped email attachments so that email server filters don't block the message; also used to hide the file type or to prevent opening.
To open a PIZ file, rename the ".piz" extension to ".zip" and open it with any Zip decompression utility.