Remove GPS spikes from a GPX
A single GPS fix that lands hundreds of metres off — in a tunnel, an urban canyon, or at a cold start — spikes your track and wrecks its max speed and distance. Drop the file and the health check finds those impossible jumps so you can delete them in one click.
Open the tool
Open the viewer and drop your file — the automatic health check flags any GPS jumps and offers a one-click, undoable Remove. Your file never leaves your device.
Open the GPX health checkHow to remove gps spikes from a gpx
- Open your file. Drop a GPX (or FIT, TCX, KML, KMZ) into the viewer — it's read locally, never uploaded.
- Read the health check. A “GPS jumps” finding lists the points that imply an impossible speed, with the peak value it saw.
- Remove & download. Click Remove to delete just those points and reconnect the track, then export the cleaned GPX. Undo is always there.
Formats & what's kept
- Input: GPX, FIT, TCX, KML, KMZ
- Output: GPX 1.1
- Preserved: Every real point, its elevation, timestamps and sensors, plus the multi-segment structure and waypoints. Distance and max speed are recomputed once the spikes are gone.
- Changed or dropped: Only the individual points that imply an impossible speed (over 250 km/h between fixes) — usually one or two. They were never real positions, so removing them straightens the line to your true path.
A real example
A tunnel dropped one fix 3 km away, so your commute shows a 300 km/h max and an extra 2 km. Removing that single point restores a 41 km/h max and the real distance — without touching the rest of the ride.
| Before | After |
|---|---|
| max 302 km/h · 63.4 km | max 41 km/h · 61.9 km |
Try it yourself with a free sample GPX file — the numbers above are illustrative of a typical case.
Privacy
This edit runs entirely in your browser using the W3C File API — your file is never uploaded, and your original is left untouched (the editor works on a copy). This tool makes no network requests at all to do its job; only route planning and snapping, which this tool doesn't perform, would ever send coordinates to a routing provider.
Frequently asked questions
What counts as a spike?
A point whose position implies an impossible ground speed — over 250 km/h between consecutive fixes. The threshold is deliberately far above any real activity, so genuine fast descents or drives are never flagged.
Does deleting a point leave a gap?
No. A spike is a wild detour out and straight back, so removing that point lets its neighbours join directly — which is the true path. Distance actually gets more accurate, not less.
Could it remove a legitimate fast section?
No. It removes only the individual out-of-range points, never a range, and the bar is set above anything a person can do on the ground, so real speed is safe.
Is it undoable and private?
Yes to both. Every removal is undoable, and the whole thing runs in your browser — your file is never uploaded and the original is left untouched.