<p>The volume and diversity of lunar data have grown rapidly, yet many repositories remain mission-centric or provide limited cartographic tools, which hinders integrated use and comparison. We present a web-based geospatial portal that consolidates heterogeneous open datasets in a single environment with a consistent lunar cartographic framework. Built with open web technologies, the system provides interactive access to topographic, geological, spectral and geophysical layers through a standard browser, preserving original spatial resolutions and providing basic layer information (source/origin, resolution (if available) and citation/link), with explicit links to primary repositories. Core capabilities include multi-layer visualization, combined raster–vector display, and a basic set of server-side tools for preliminary analysis (mask and coordinate-based clipping, contour generation and raster information). The portal is publicly accessible without registration and supports both research and education by lowering the entry barrier and making exploratory steps transparent (via explicit provenance) with respect to the catalog snapshot described in the manuscript. This work demonstrates a practical approach to integrating lunar datasets for browsing and initial analysis, offering an administrator-managed foundation that can be extended with additional data and functions as needs evolve.</p>