Nielsen SDK Inspector is a Chrome extension designed for visualizing API calls made to the Nielsen Browser SDK. The primary purpose of this tool is to provide insights into the SDK's operations, facilitating the identification of bugs and issues that may arise during integration. As a beta product, it aims to enhance user experience through feedback and feature requests.

The extension offers an intuitive interface that allows users to drag and position the inspector window on the webpage, as well as resize it by adjusting its borders. It memorizes the window's location on a domain-specific basis for future sessions. Additionally, the stream within the extension autoscrolls to the bottom when the user is at the bottom of the window, with the option to stop autoscrolling by scrolling up slightly.