Load two FIT or GPX files to compare metrics and routes side-by-side.
Compare loads two activity files and lines them up chart by chart — speed, heart rate, elevation, and pace — so you can see exactly where they diverge. Recorded the same ride on two devices, or want to measure two attempts on the same route? This shows the difference.
Both routes draw on a shared map, summary stats sit side by side, and the charts are synced. It accepts any mix of GPX and FIT, all in the browser with nothing uploaded.
Two recordings of the same ride from different devices, the same route ridden on two days, or a GPX against a FIT of the same activity. Compare overlays the routes and syncs the charts so differences in speed, heart rate, elevation, and pace are easy to spot.
Yes. Load any mix of .gpx and .fit — for example a Strava GPX export against the original Garmin FIT — and Compare normalises them so the charts and stats line up.
GPS sampling rate, satellite reception, barometric vs GPS elevation, and smoothing all differ between devices, so distance, elevation gain, and speed can vary. Compare makes those differences visible point by point.
No. Both files are parsed and compared in your browser; nothing is sent to a server.