Jxlstokml -
The search term has gained traction because of a fundamental disconnect in modern software: spreadsheets and Geographic Information Systems (GIS) rarely speak the same language out of the box.
Since native KML cannot embed JXL data, you must first convert JXL to a compatible raster (like PNG or GeoTIFF), then wrap it in KML. JXLStoKML
While JXL (the Java library) is now aging—its last major release was circa 2009—the concept remains vibrant. Modern alternatives include: The search term has gained traction because of
A KML that references the JPEG version of your JXL. JXLStoKML