The deployment of distributed ledger technologies (DLT) and, more specifically, blockchain, has promised to transform supply chain management. However, there has been relatively little investigation of how visualization of blockchain data may impact supply chain decision making. SimChain is a web application for the simulation of a small supply chain with or without the integration of blockchain technologies. Blockchain offers potential opportunities to improve supply chain decision making, and SimChain is designed to support empirical examinations of such benefits through the visualization of blockchain data. Most remarkably, SimChain allows the administrator to configure environmental variables to simulate event-based interruptions to the supply chain. SimChain is built using the Django framework for web deployment, and Python scripts and MySQL for data simulation. SimChain is highly configurable, allowing administrators to configure nearly 50 different supply chain settings.