TrackSplice

Merge two recordings of the same ride

You rode with two devices at once — a Garmin for GPS and heart rate, an eBike app for motor power and battery. Each file is incomplete, and uploading both creates a duplicate.

Merge takes one file as the base timeline and fills in fields from the other, matched by time.

How it works

  1. Load both files and pick which one is the base.
  2. Choose, per field, which file it comes from. Coverage per file is shown so you can see who recorded what.
  3. If the device clocks differ, set an offset or let auto-sync find it.
  4. Download one FIT file and upload it to Strava or Garmin Connect.

Your files are processed in your browser and are never uploaded.

Open Merge in TrackSplice