Context ThumbView - Version 1.5 Context ThumbView is a Windows Explorer context menu extension that provides image preview just in the right-click menu. It supports most of popular image file formats, including BMP, GIF, JPEG, PNG, TIFF and is very handy for quick image viewing. Context ThumbView is invoked by right-clicking on an image file. It allows to save thumbnails, send them by email or copy to the Clipboard.