Pick a climb, a sprint or a descent and you get the elevation gain, pace, gradient and speed of that segment alone. Most tools only give you the average for the whole outing.
I wanted my numbers for one specific part of my run, say the climb over the last two kilometres, rather than the average for my three-hour outing.
I couldn't find an online analyser that let me isolate an arbitrary portion of a GPX track. They all showed the totals, or Strava segments drawn by other runners, but never the portion I cared about on my outing.
In the end I coded the reader I was looking for myself. Anyone can use it, with no account and no upload.
Same GPX file, read differently.
These are the same measures as in GPXchunk, but calculated over the whole four-hour outing. The climb gets lost in the flat return leg and the sprint in the warm-up, and you can't isolate the portion you're interested in.
The same measures, recalculated for the segment you pick. Drag two handles on the profile or type the kilometre bounds, and the thirteen numbers update for that segment.
Thirteen measures calculated point by point from your GPX file. The map, the elevation profile and the selected segment stay in sync.
Drag two handles on the profile, click two points on the map or type the kilometre bounds. The thirteen measures recalculate live for the isolated segment. I haven't found this feature in any other online GPX reader.
Segment analysisThe terrain of the route, plotted from the altitude of each point. Click anywhere on the curve and the matching marker moves to that spot on the map.
The calculation uses a ±1 m threshold to filter out GPS noise, so small altimeter wobbles don't inflate the total. The result is close to what Strava or Garmin Connect show. The same D+ is used for km-effort, a difficulty index that combines distance and climb.
On the selected segment: pace in min/mi, speed in mph, climbing speed in ft/h and average and max heart rate in bpm, from timestamped data. Distance is calculated with the haversine formula rather than a linear approximation.
The gradient is smoothed over a rolling 50 m window to absorb altitude noise, which gives a figure closer to what you feel in your legs.
Open map tiles, the track on top and two movable markers at the ends of the segment. You can zoom, pan and open popups.
A .gpx file exported from Garmin, Strava, Komoot, Suunto, Coros, Wahoo, Apple Watch, Polar and so on. The file stays in your browser and isn't sent anywhere.
Drag the two profile handles, click on the map or type the kilometre bounds. The selection stays in sync across all three views.
The measures update live for the segment alone: distance, time, D+, D−, speed, pace, max altitude, min altitude, net gradient, V.A.M., average HR, max HR and km-effort.
The tool works for any sport that records a GPS track. A trail runner might isolate a climb, a road cyclist a final sprint, a hiker a col crossing.
Your GPX file is never sent to a server. Reading the file, calculating distance and elevation, and drawing the map all happen in your browser tab. Your track doesn't leave your device, and that comes from how the tool is built, not from a promise.
The project is free and funded by Google AdSense slots. AdSense sets its own advertising cookies, framed by a consent banner.
When you close the tab, the file goes with it.
<trkpt>, <ele> and <time> tags are read for the track; <wpt> (named waypoints) appear as icons on the map with their name and description. Exports from Garmin Connect, Strava, Komoot, Suunto App, Coros, Wahoo SYSTM and Apple Workout work as they are.Drop a GPX file and isolate the portion you care about. You don't need to sign up.
Open the analyser →