Crop and trim a GPX track
Remove the parts you don’t want — the drive to the start, a forgotten stop at the end, or anything outside a box you draw on the map.
Drag a file anywhere onto the editor, or .
Nothing is uploaded — editing happens in your browser. Reads .gpx, .tcx, .fit, .kml and .kmz.
Fix GPS errors
Your watch drifted or teleported? Remove spikes that jump away and snap back.
Reduce points
Fewer points = a smaller file that fits your device's course limit. Re-run anytime — it always starts from your full track, so you can go up or down.
Advanced: spacing & simplify
Edit points
Elevation
This file has no elevation data.
Opt-in: sends only the coordinates of points needing elevation to the terrain provider. Your file is not uploaded.
Re-upload as new
Strava & Garmin reject re-uploads as duplicates. Shift the time or randomize the file ID so it uploads as new.
Plan a route
Click the map to drop points. Below zoom 12 the first click zooms in so you can place accurately.
Export format
Map data © OpenStreetMap contributors. GPX Toolkit is not affiliated with Strava, Garmin, Coros, Suunto or Wahoo.
Trim the start and end
Select any point and use Cut before / Cut after to drop everything on one side of it. Great for chopping off the walk from the car park or the bit where you forgot to stop your watch.
Crop to a box
Turn on Crop to box and drag a rectangle on the map to keep only what’s inside it — handy for isolating one lap or one section of a longer file. There’s also a one-click Trim idle start/end for GPS that sat still before you got moving.
How to crop and trim a gpx track
- Open your GPX file.
- Click a point and choose Cut before or Cut after — or use Crop to box and drag a rectangle.
- Fine-tune with drag/delete if needed.
- Download the cropped GPX.
FAQ
Can I trim just the beginning where my watch was searching for GPS?
Yes — “Trim idle start/end” automatically drops the stationary points at both ends, or use Cut before at the point where you actually started moving.