Free online tools for fixing, editing and analyzing GPX files from sports trackers. Merge tracks, smooth GPS spikes, adjust timestamps, remove stops and reconstruct lost activities. Local processing — your data never leaves your browser.
// available tools
Fix incomplete GPX tracks by replicating missing segments from a reference route. Preserves heart rate, cadence and all extensions.
Launch toolMerge 1–20 GPX tracks into a single file. Auto-sort by time, preserve HR and all extensions, time gaps simulated as paused watch.
Launch toolRecalculate GPX activity times — set a new start, end, or shift the entire recording by an interval. Activity duration is preserved.
Launch toolDetect stops in your track (restaurants, breaks) and convert them to proper pauses — splitting segments with oscillating point removal.
Launch toolReconstruct a lost activity from a reference track — enter time and distance, the tool recalculates points preserving the speed profile.
Launch toolDetect and fix GPS spikes — jumped points are moved to interpolated positions. Preserves timestamps, HR and all data.
Launch toolFix noisy or missing elevation data using DEM sources. Smooth elevation profiles.
Crop a GPX track to a specified time or distance interval.
Fill in or fix missing heart rate records by interpolating from available data.
Split one long GPX activity into multiple smaller ones by stops or distance.
Missing a feature? Let us know — the most requested ideas will be implemented.
