🏃 GPX Lane Snapper

Drop a GPX file from a run on a 400 m track. Line the track up with the satellite image, pick your lane, and every GPS point moves onto that lane. Time, heart rate and cadence stay exactly as recorded. Runs entirely in your browser: your GPX is never uploaded.

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📂 Drop a GPX file on the map or use Open GPX · processed entirely in your browser

Raw GPS Corrected lane Green handle moves the track, red handle rotates it.

Step through

GPX file

Open GPX Check on Google Maps

Lane Lane 1 · 400.0 m

Track position -

Long straights bearing (compass, 0-179°)

Auto-fit lines the track up with the GPS points, which may sit a few metres off. Then drag it onto the real track in the satellite image.

Steps of 0.5 m and 0.5°

Overlay opacity 45% Show raw GPS points

Smoothing 15 s Even pace within each lap (recommended for noisy GPS) Round the distance to whole laps Flatten elevation in the export

Track size (non-standard tracks)

Straight length (m) Curve radius at the kerb (m) Lane width (m)

Export

Saves a .gpx you can upload to Garmin Connect or Strava.

Lap splits

Lap	Split	Pace /km	Elapsed

Pace over time

30-second rolling pace. Faster is higher.

Raw GPS Corrected