// Import GoJS library import * as go from 'gojs'; // Apply your license key globally go.Diagram.licenseKey = "YOUR_VALID_LICENSE_KEY_STING_HERE"; // Initialize your diagram normally const myDiagram = new go.Diagram("myDiagramDiv", // diagram properties ); Use code with caution. Critical Rules for License Key Placement
Removing the watermark is just one perk. A paid license also provides:
Remove the watermark by writing this line: gojs remove watermark
GoJS, developed by Northwoods Software, offers a fully functional evaluation version. To distinguish unlicensed usage, the library displays a small watermark — usually "Evaluation" or "© Northwoods Software" — on diagrams rendered in a browser. This watermark is not a bug or an oversight; it is an intentional mechanism that protects the software creator's rights while allowing developers to test functionality before purchase.
go.licenseKey = "YOUR_LICENSE_KEY_HERE"; var myDiagram = new go.Diagram("myDiagramDiv", ... ); Use code with caution. // Import GoJS library import * as go
However, if you have ever used the unlicensed version of GoJS in a development environment—or accidentally deployed a trial version to production—you have seen it: the dreaded . This semi-transparent overlay typically reads "Trial Version" or "GoJS Evaluation" and sits stubbornly on top of your beautiful diagrams.
In 2022, a German startup used a hacked GoJS watermark remover. Northwoods detected it via their automatic telemetry. The startup ended up paying €4,500 in back-licenses + legal fees to avoid a court order. To distinguish unlicensed usage, the library displays a
: Obtain a commercial license from the Northwoods Software pricing page . Options range from individual licenses ($3,995) to team licenses.
If you are a software developer, data visualization engineer, or product manager, you have likely encountered GoJS. It is arguably the most powerful JavaScript library for interactive diagrams, flowcharts, and organizational charts. However, if you are using the unlicensed version, you have also encountered the infamous : a small (but persistent) text stamp that reads “ Evaluation ” or displays a copyright notice in the corner of every diagram.
The key only works for the domain it was issued for. localhost often requires its own specific setup or a universal key.