What is a NW file?
An .NW file is a Node-Webkit App Package. Developers use it with the NW.js framework to build desktop software using web technologies like HTML and JavaScript. This framework project was originally created at the Intel Open Source Technology Center. Under the surface, an .NW file is a standard ZIP archive that stores the application code and resources.
How to open NW files?
To run the actual application, developers use the NW.js runtime environment. If you only need to inspect the files inside the package, you can rename the file extension from .NW to .ZIP. Then, you can open it with archive tools like 7-Zip or the built-in extraction tools in Windows and macOS.
Inspecting files online
If you are not sure what your file contains, viewer.online/nw analyzes .NW files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Summary
Because .NW files use the known ZIP format, viewer.online/nw can safely open and display them online, eliminating compatibility problems.