NVU is a small cross-A HTML editor designed in the open source code language W3C by platform visual (WYSIWYG). Mozilla Composer is the source code behind it. Thanks to this, the editor has grown more versatile and intuitive, while becoming close to other commercial "brothers", FrontPage and Dreamweaver in terms of functionality at the moment.
NVU allows easily and simply to any beginner unfamiliar with HTML, in a visual mode to create a qualitative site or the separate pages answering to all modern web standards. It is possible to use direct editing mode if needed by more advanced users. Moreover, NVU has more tools in addition to its core technology. There is this tool called Site Manager, which makes it possible to manage pages not only on a remote server, but to also edit them straight on and edit them directly, such as preview styles, color syntax highlighting and spell check options with this app. The extension interface for NVU supports connecting other topics. It also has the ability to greatly expand functionality by implementing special extensions for Mozilla Firefox that enable users to change the editor's functionality.
Various settings can be used for the tabbed interface, like a preview browser, a wizard to create often visited elements and other features. In addition, there are several disadvantages, such as the lack of features such as syntax highlighting. Furthermore, there is no documentation available for this program.
Along with Microsoft Windows, Linux and Mac OS X support are also available for the program. There is also a Portable version available. A developer does not currently support the editor. KompoZer's HTML editor, which used the utility's source code, was released in 2006. Nvu has often been referred to as his successor.