Merge FIT sensor fields
Head unit has GPS, watch has HR. Copy selected channels by time.
Files stay on this device
1Select a file
2Fields to copy
3Run
Select a file first.
Your file is processed in your browser and never uploaded.
What this format is
Two devices, one activity: a head unit with GPS and a watch with HR. This copies selected fields by timestamp.
How to get the file
- From Garmin Connect
- 1. Export both original FIT files. Drop GPS file first, HR file second.
- From Strava
- 1. Upload the merged FIT as a new activity.
What is kept and what is lost
| Kept | Lost or missing |
|---|---|
| Base file structure plus donated sensors | Records in the donor that do not line up within 5 seconds |
Questions
Which file is the base?
The first file in the list is the ride. The second donates the sensors you tick. Match window is five seconds.
What if timestamps do not line up?
Donor records more than five seconds off are skipped. The base file structure stays.
Can I copy more than heart rate?
Yes. Power, cadence, GPS and elevation are on the same checklist.