windows - Command-line utility to convert GPX into KML?

I use Cycle.travel to draw cycling routes. However, the Android application I use on my smartphone only supports KML.

As an alternative to GPSVisualizer, I tried the command-line utility GPSBabel, but, besides turning a compact 5K GPX into a much bigger 80K KML, the route is displayed as a long series of waypoints instead of a simple line:

Does someone know of an alternative command-line utility to GPSBabel?

Here's a sample from the source GPX file and the KML generated by GPSBabel:

GPX

ACTIVE LOG



…

KML from GpsBabel

…
    
      2.252120
      48.785320
      15131.199708
    
    

    
…
…

Distance 9.8 mi 
]]>

        
          Points
          

            ACTIVE LOG-0
            
            



Longitude: 2.316100 
Latitude: 48.815690 
Heading: 2.0 
…
        

          Path
          #lineStyle
          
            1
            
2.316100,48.815690
2.315900,48.815790
…
2.189150,48.754560
2.188140,48.755100