Package and Distribute

This document guides you how to package and distribute NW.js based app.

Quick Start

You can use following tools to automatically package your NW.js based app for distribution.

Or your can build your app manually with the instructions below.

Prepare Your App

Before packaging, you should prepare all necessary files on hands. Check out following checklist to make sure you didn’t miss anything:


Do not assume your node_modules that target one platform work as is in all platforms. For instance node-email-templates has specific Windows & Mac OS Xnpm install commands. Besides, it requires python to install properly, which is not installed by default on Windows.
As a rule of thumb npm install your package.json on each platform you target to ensure everything works as expected.

Filename and Path

On most Linux and some Mac OS X, the file system is case sensitive. That means test.js and Test.js are different files. Make sure the paths and filenames used in your app have the right case. Otherwise your app may look bad or crash on those file systems.

Long Path on Windows

The length of path used in your app may exceed the maximum length (260 characters) on Windows. That will cause various build failures. This usually happens during installing dependencies with npm install using older version of NPM (<3.0). Please build your app in the root directory, like C:\build\, to avoid this issue as much as possible.

Prepare NW.js

You have to redistribute NW.js with your app to get your app running. NW.js provided multiple build flavors for different requirements and package size. Choose the proper build flavor for your product or build it from source code.

All files in the downloaded package should be redistributed with your product, except tools in SDK flavor including nwjc, payload and chromedriver.

Package Your App

There two options to pack your app: plain files or zip file.

On Windows and Linux, you can put the files of your app in the same folder of NW.js binaries and then ship them to your users. Make sure nw (or nw.exe) is in the same folder as package.json. Or you can put the files of your app in a folder named package.nw in the same folder as nw (or nw.exe).

On Mac, put the files of your app into a folder named app.nw in and done.

It’s the recommended way to pack your app.

Package Option 2. Zip File

You can package all the files into a zip file and rename it as package.nw. And put it along with NW.js binaries for Windows and Linux. For Mac, name it app.nw and put it in

Start Slow with Big Package or Too Many Files

At starting time, NW.js will unzip the package into temp folder and load it from there. So it will start slower if your package is big or contains too many files.

On Windows and Linux, you can even hide the zip file by appending the zip file to the end of nw or nw.exe.
You can run following command on Windows to achieve this:

copy /b nw.exe+package.nw app.exe

or following command on Linux:
cat nw package.nw > app && chmod +x app 

Platform Specific Steps


Icon for nw.exe can be replaced with tools like Resource Hacker, nw-builder and node-winresourcer.

You can create a installer to deploy all necessary files onto end user’s system. You can use Windows Installer, NSIS or Inno Setup.


On Linux, you need to create proper .desktop file.

To create a self-extractable installer script, you can use scripts like shar or makeself.

To distribute your app through the package management system, like apt, yum, pacman etc, please follow their official documents to create the packages.

Mac OS X

On Mac OS X, you need to modify following files to have your own icon and bundle id:

To rename the application, the following files should be modified:
* Contents/Info.plist - CFBundleDisplayName
* Contents/Resources/en.lproj/InfoPlist.strings - CFBundleDisplayName
* Contents/MacOS/nwjs - rename the file to the value of CFBundleExecutable if you changed it
* package.json – add a string field product_string (e.g. foobar); the helper application will be shown as ‘foobar Helper’. (since v0.24.4)
* Contents/Frameworks/nwjs Framework.framework/Versions/n.n.n.n/nwjs - rename the directory to ‘foobar’, and also the three other helpers
* Contents/Frameworks/nwjs Framework.framework/Versions/n.n.n.n/nwjs - change CFBundleDisplayName, and also the three other helpers

You should sign your Mac app, or the user won’t launch the app if Gatekeeper is turned on. See Support for Mac App Store for details.


See wiki of NW.js for more tools of packaging your app.