Check out the latest documentation.


The 51Degrees Node.js detector is designed to be quick to deploy for even low skill developers, and provide fast, accurate and consistent results for both real time device detection within web sites and offline analysis. All the source code and 51Degrees free Lite data is licenced under the Mozilla Public Licence version 2.

The Detection solution can be installed via NPM. Source code is available for download from the github.

The following pages explain where to download official distributions, initial deployment, obtaining updates to device data before covering more advanced features such as troubleshooting and automatic data updates.