fitstitch

Join two FIT files into one activity, or trim one

Stopped and saved your run or ride halfway by accident, or forgot to stop the watch at the end? Join the two activities back into one, as if you had paused instead of saving, or trim off what you didn’t mean to record. No data is lost.

1. Export the activities

On Garmin Connect, open each activity, then ⚙ → Export Original (you get a .zip). On Strava, open each activity, then ⋯ → Export Original. FIT files from other devices and apps (Suunto, Wahoo, Coros…) work too.

The phone apps can't export files: use the websites, on a computer or in your phone's browser (if it keeps opening the app, ask for the desktop site).

2. Add them here

Add two or more files to join them into one activity, or a single file to trim its start or end.

Private: your files are never uploaded or stored

4. Replace the parts

Delete the original parts first, wherever they were uploaded: Garmin Connect, Strava and most other apps reject an activity with the same start time as an existing one. Kudos, comments, photos and titles on the parts are lost. Then upload the stitched file to Garmin Connect (Import Data), Strava or any other app that accepts FIT files. If your apps sync with each other, uploading it to one may be enough.