GpxFix - Strava activity repair and GPX export tool

At this time, we only support the indoor track at Bislett Stadium in Oslo, Norway. Contact us if you want us to add another indoor track.

This feature will attempt to restore missing portions of your workout by checking whether you likely entered an indoor track and completed a significant part of the session without GPS coverage. We do this by detecting whether you passed a known indoor track and then experienced a prolonged loss of GPS signal while heart-rate data continued to be recorded. Using reference GPS data from known indoor tracks, we interpolate your movement along the track to reconstruct the missing segment.

Please note that some sport watches automatically switch between indoor and outdoor tracking and these devices may provide more accurate estimates of total distance and pace.

This feature fills gaps in your track, such as caused by forgetting to resume your watch after pausing it. Any gap between 30 seconds and 10 minutes will be detected and filled with interpolated track points based on your position, elevation and heart rate at the start and end of the gap.

Use the time slider to find a track point index near the gap you want to fill. Leave blank to fix all detected gaps. The entered value only needs to be within 20 track points of the actual gap position.

Select reference file such as race organizers GPX file
We will automatically try to repair your GPS data by comparing your track points with that of the reference file. When we find missing segments or track points with coordinates completely off we will use the reference file to recreate your track. If you choose to extend a cut-short activity, we will append the rest of the route from the reference file. We will automatically try to extend your activity by checking if the reference track continues where your original track stopped. We will also try to extrapolate and predict your HR and speed based on the elevation profile and data from your existing track. This is useful if your sports watch battery ran empty and you want to recover the rest of your activity. This will of course never be accurate but usually better than just having a cut-short activity.