GPX Viewer Online — Track Map, Editor and Converter

Google Maps itself does not open track files — Google My Maps does: create a map there and press “Import” in a layer. Open your file here, pick “Google My Maps” and download: the track is saved as KML with at most 2,000 points, so the import does not stall on a long recording. The finished map then opens in the Google Maps app under You → Maps.

Open the KML or KMZ file, pick “GPX — track” (or “GPX — route” if the file is going to a navigator) and download. If the KML points carried time, as a Google Earth export does, it carries over into the GPX. A KML from Google My Maps sometimes holds only a link to a map on the web and not a single point — such a file has to be exported again without the network link, and the tool says so.

Press “Draw a route”, zoom the map to the place and click — those are the route points; drag a point to move it, double-click removes it, and “Close the loop” makes a round trip. Elevation comes in from terrain data, and the summary shows the time it takes on foot and by bike. For a navigator, save as “GPX — route” so it lays the road between the points itself; for apps, save as “GPX — track”.

Every app smooths altitude its own way. A watch with a barometer measures altitude precisely, and its total is close to ours (about 5 % apart on real recordings). A phone or a watch without a barometer records GPS altitude, which jumps by meters, and apps either filter it hard or replace it with terrain data, as Strava does for such devices. If the numbers for your file come with a note about GPS, press “Take elevation from terrain” to get a figure comparable to Strava’s corrected one.

A climb starts at a low point and continues until the road drops back by more than 10 m (up to 40 m on a long pass). Flat approaches at either end are trimmed off, and a climb counts from 300 m long with at least 20 m of gain and a 3 % average grade. The category follows Strava’s rule: length in meters times average grade in percent; Cat 4 from 8,000, hors catégorie from 80,000. Alpe d’Huez (13.7 km at 8.1 %) is hors catégorie.

Pick “Garmin watch / bike computer (course)” and download the FIT file. Connect the device over USB and copy the file into its NewFiles folder, or import it into Garmin Connect under Courses and send it to the device. If the track has no time, the course gets an even timeline for the virtual partner. The same file also opens on Wahoo and Hammerhead devices.

Strava accepts an activity only if its points carry time, and a route from a planner has none. Press “Add time” under the warning by the Download button: the timeline follows the grade — on foot or by bike, at the flat speed you set — and the file can then be saved for Strava. If you only need the route, import it into Strava as a route, not as an activity.

Press “Video” under the Download button and pick the format — 16:9 for YouTube, 9:16 for Stories and Reels, or square — a length from 10 to 60 seconds, and a dark or light map. The preview shows exactly what goes into the file: a fly-in to the start, the route with the numbers counting up and the elevation profile, the whole route at the end. The MP4 is put together right in your browser.

Drop the zip archive as it is; there is no need to unpack it. The tool reads only the archive’s index and the activities you pick, so even a multi-gigabyte export opens quickly. Strava activities come with their names from activities.csv; the ones you pick can be opened on the map or saved in one format at once as an archive or into a folder, and the heat map draws every activity at once.

A plain KML line stores coordinates only. Heart rate, cadence and power need a time on every point: pick “KML with time” (it keeps them for Google Earth) or GPX, FIT, TCX. Before you download, the tool always says what the chosen format will drop.

Use “Hide where you live” on the Edit tab: the tool removes the part of the track within the chosen radius of the start and the finish. A fixed circle gives its center away, so the cut edge gets a random extra distance. You can also remove times, heart rate and the device name. Check both ends of the track on the map before saving.

A stretch counts as moving if the track advances at 0.5 m/s (1.8 km/h) or faster over ten seconds; a gap of more than a minute between points counts as a stop. On watch recordings with auto-pause this matches the watch timer within about 1.5 %.