How do I obtain the coordinates along GMaps direct

Question

I want to create an online map for a hiking trail, and I have been using my smartphone to collect coordinates from it.

I have many questions regarding what's good practice when it comes to making such tracks, but for starters: it would look much neater if I could edit the readings so that they are right on top any roads in Google Maps. How can I achieve this?
EDIT: I want to find the coordinates that will make a track along a road look exactly as if I'm using snapping/directions even when I'm not.

I've tried tools such as QLandkarte GT and Viking, and with the latter I was able to manually remove excess coordinates and move the remaining ones so that they're exactly on top of roads (inside Viking, using OpenStreetMap). However when I load the edited .kml-file in Google Maps, the roads seem to be in slightly different places and the result is hardly better than before editing.

I tried using the hack that exports GMaps directions as .gpx, thinking I could insert Google's own coordinates along the roads. But the exported file only had coordinates at the turning points with straight lines between these.

QLandkarte GT supposedly has a snap-to-road feature (see answer in link), but I haven't found it and I also don't know how to obtain a vector map of the area.

Then there's Google Earth which people seem to use for this, but again I can't find any track editing features (in the free version).

In short:
How do I edit my existing tracks so that they match roads in GMaps...
OR
How can I obtain new tracks representing roads in GMaps...

...so that the resulting track is as smooth as Google's own directions or other professional GPS-data, when displayed in GMaps?

Answer 1

It seems like it's possible to get these coordinates from Google Maps after all, exporting the directions polyline. I'm not sure how, it seems to involve adding the parameter output=dragdir to the link.

Anyway there's a tool called GPS Visualizer that can create a .kml-file with the wanted coordinates.

Edit: Will accept my own answer as long as it's the only one, but I would still like to know more.