Change impact analysis is a vital process for managing changes in complex systems. This becomes especially important in decentralized systems like those based on microservices. The paper presents a SAVAT tool designed to facilitate change impact analysis in microservice systems. SAVAT enables practitioners to interact with visual exploration of microservice systems, both from two architectural views (service and domain views), using the established notions of context maps and service dependency graphs, along with a novel notion of inter-microservice call graphs. Our tool can also automatically highlight changes in different versions of microservice systems and provide support to explore how the changes propagate through the system.