is a control (UI component) that allows developers to embed fully interactive, paginated reports into Windows Forms (desktop) and ASP.NET Web Forms applications. It serves as the rendering engine for Microsoft Reporting Services (SSRS) reports, enabling applications to display, export, and print reports without requiring a direct connection to a full SQL Server Reporting Services server.
Microsoft Report Viewer offers a robust feature set that competes with paid third-party libraries: microsoft report viewer