IPConvert

IPConvert will take a standard IPv4 IP address, in the standard dot notation format, and display it as an IPv6 IP address, showing it in four different formats. This is useful for quick conversions and for getting used to the up-and-coming IPv6 IP address format. You can also easily copy the results of the conversion to the clipboard for pasting into another program.

IPConvert is FREEWARE. It contains absolutely no adware, spyware, virii, or trojans.

It is packaged as an MSI (Microsoft Installer) for easy installation and un-installation.