GPX Merge Tool

Combine multiple .gpx files into one activity in your browser.
Files are sorted by time, checked for continuations, and merged privately on your device.

or drag and drop

Select a GPX file, then add more one at a time

1. Upload

Select or drag a .gpx file, then add more one at a time

2. Check

Files are sorted by time and checked for continuations

3. Download

Download one merged GPX and use it in GpxOverlay app

Create video overlays with your GPXUpload your merged GPX and activity video to GpxOverlay to add speed, elevation, heart rate, power, and route map overlays.

Go to GpxOverlay app

About GPX Merge Tool

The GPX Merge Tool lets you combine multiple GPX files into a single activity directly in your browser. Upload two or more files from a long ride, hike, or run that was split across devices or recording sessions, and the tool will sort them by time, check whether the tracks continue naturally, and produce one downloadable GPX file.

Perfect for cycling, running, hiking, ski touring, and any sport where activities get exported in parts. The tool shows combined stats — total distance, duration, elevation gain, and which sensor data (heart rate, power, cadence, temperature) is present — before you download.

All processing happens locally in your browser. Your GPX files are never uploaded to any server, so your activity data stays private. If files do not line up (for example, a large GPS jump between segments), you will see a clear warning but can still download the merged file if you choose.

Use the merged GPX in Strava, Garmin Connect, Komoot, or create a video overlay with the GpxOverlay app.

Why merge GPX files?

One activity from multiple recordings

Long rides, hikes, and runs are sometimes saved as separate GPX files when you pause recording, switch devices, or export from different apps. Merging them into one file makes it easier to upload to Strava, analyze your full effort, or create a single video overlay.

Smart ordering and validation

The tool automatically sorts files by start time and checks whether each segment continues from the previous one. You see distance and time gaps between files before downloading, so you can spot accidental mixes of unrelated activities.

Private and instant

Everything runs in your browser. No upload, no account, no waiting. Your GPS and sensor data never leave your device.