This package provides functions and necessary JavaScript bindings to quickly transfer spatial data from R memory or remote URLs to the browser for use in interactive HTML widgets created with the htmlwidgets R package. Leverages GeoArrow (<https://geoarrow.org/>) data representation for data stored in local R memory which is generally faster than traditional GeoJSON by minimising the amount of copy, serialization and deserialization steps necessary for the data transfer. Furthermore, provides functionality and JavaScript bindings to consume GeoParquet (<https://geoparquet.org/>) files from remote URLs in the browser.