GIS server and desktop GIS technology support scientific work at all levels, from data collections and processing to data management and data visualisation. Here we present how the development and publication of a scalable WebGIS supports the ESA DUE Globpermafrost (2016-2018) and the follow-on ESA CCI+ Permafrost I (2018-2021) and II (2022-2025). Within GlobPermafrost a wide range of experimental remote sensing products were processed: Landsat multispectral index trends, Arctic land cover, lake ice grounding, surface deformation, and rock glacier velocities. According to the ECVs required by the Global Climate Observing System (GCOS) the main products were global permafrost temperature, Active Layer Thickness and permafrost probability maps produced by a TTOP model forced by satellite derived surface temperature and snow. CCI+ Permafrost continued with enhanced modelling based on the community CryoGrid permafrost model producing mean annual ground temperature MAGT per depth down to 10 m, Active Layer Thickness (ALT), and Permafrost Probability and Extent (PEX) per pixel. To make resulting data products accessible via visualisation, several WebGIS projects e.g. ‘Arctic’ WebGIS visualising circum-artic products, as well as small-scale regional WebGIS projects like ‘Alps’, ‘Andes’ or ‘Central Asia’ that visualise e. g. higher spatial resolution products like rock glacier movements have been made publicly available using WebGIS technology within maps@awi (http://maps.awi.de), a highly scalable data visualisation unit within AWI’s data workflow framework O2A (from Observation to Archive). GIS services have been created and designed using ArcGIS Pro and finally published as Web Map Services (WMS), an internationally standardized format (Open Geospatial Consortium (OGC)), using ArcGIS Server. The project-specific data WMS as well as a resolution-specific background map WMS are embedded into a GIS viewer application based on Leaflet, an open-source JavaScript library. The CCI+ Permafrost Time Series WebGIS provides circumpolar MAGT, PEX, and ALT for 1997-2021 as a time slider visualization in annual resolution. Beside remote sensing and model-derived data products, the locations of the GCOS ground-monitoring networks of the permafrost community, the Global Terrestrial Network for Permafrost (GTN-P) managed by the International Permafrost Association (IPA) were add as feature layer. ESA CCI+ data products are DOI-registered and archived in the ESA CEDA data archive.