This format can...
GPSBabel's HTML output generates a single HTML file of all of the waypoints in the input file. It supports a number of Groundspeak GPX extensions and filters out potentially harmful HTML from the input file while maintaining almost all of the source HTML formatting. This makes this format well suited for generating HTML to hand to programs like Plucker for putting in a PDA and especially so for "paperless caching" for Geocachers with pocket queries.
This format is similar to the text format.
The following command line reads a GPX file with Groundspeak extensions and writes an HTML file with encrypted hints that is rendered using a custom stylesheet:
gpsbabel -i gpx -f 12345.gpx -o html,stylesheet=green.css,encrypt -F 12345.html
Path to HTML style sheet.
Use this option to specify a CSS style sheet to be used with the resulting HTML file.
Encrypt hints using ROT13.
Use this option to encrypt hints from Groundspeak GPX files.
Include groundspeak logs if present.
Use this option to include Groundspeak cache logs in the created document.
Degrees output as 'ddd', 'dmm'(default) or 'dms'.
When GPSBabel writes coordinates, this option is consulted to see if it should write decimal degrees ('ddd') decimal minutes ('dmm') or degrees, minutes, seconds ('dms'). The default is 'dmm'.