Cannot upload a fit activity to Garmin Connect Web

Deicon 4 days ago

Hi,

I've tried to upload the .fit file of my activity to Garmin Connect, it says: "The system did not accept one of the files. Ask the support department for help."

Could you please help me with this?

Thank you in advance.

Jakub

Top Replies

4078779 3 days ago in reply to Deicon +1

Try uploading it with Microsoft Edge, this works for me now.
I'm using Firefox and this stopped working for me since this week.

All Replies

0 seilogramp 4 days ago

You can try to repair the file using 3rd-party tools, such as FIT File Viewer or FIT File Tools. Both of these run in the browser and require no additional software. If you're still unable to import the activity into Garmin Connect, attach the file to this thread. We can take a look to see if it is repairable.

Zip the file, then in a reply post Insert >> Image/video/file >> click Upload >> browse for file >> OK.
Or upload the fit file to a reputable file sharing service, such as OneDrive, Google Drive, Dropbox, make the file public, then paste a link to the file in your post.

0 Deicon 3 days ago in reply to seilogramp

2025-08-07-05-55-08.zip

@seilogramp: Many thanks for your reply. I've tried both (FIT File Viewer and FIT File Tools), both seems to be OK. But still not possible to upload my fit file via Garmin Connect Web.

Thanks for your help.

0 4078779 3 days ago in reply to Deicon

Try uploading it with Microsoft Edge, this works for me now.
I'm using Firefox and this stopped working for me since this week.

0 seilogramp 3 days ago in reply to Deicon

Deicon said:
still not possible to upload my fit file via Garmin Connect Web.

Your fit file is not an activity, it's a course. Is that what you expected? I can import this as a course without any issues.

Go to Garmin Connect Web > Training & Planning > Courses https://connect.garmin.com/modern/courses
Click on Import > Browse for your unzipped fit file then select it.
Click on Get Started, select the desired parameters, then save.

0 Deicon 3 days ago in reply to seilogramp

Hi, it should be an activity. It is actually 2 activities (from 2 different edges) merged i lnto one.

Thanks

0 Deicon 3 days ago in reply to 4078779

Hello, thank you for your reply.

I tried that, but unfortunately without success.

0 seilogramp 3 days ago in reply to Deicon

Deicon said:
It is actually 2 activities (from 2 different edges) merged i lnto one.

Deicon, could you post the 2 non-merged individual FIT files? Merging fit files does not always work correctly.

Alternatively, you can convert the fit file you have to a GPX file then import it as an activity (I used Garmin Basecamp to test). However, it will be missing most of the metrics you expect from an activity. I tested in Chrome and Edge. Firefox and Safari currently having issues as many have reported here - Problems uploading .fit file - Garmin Connect Web - Mobile Apps & Web - Garmin Forums

0 1907012 2 days ago in reply to Deicon

I have the same issue here… please help

0 seilogramp 2 days ago in reply to 1907012

1907012 said:
I have the same issue here

What exactly? Did you try to merge 2 activities, like Deicon did? If so, attach them here so we can see what is going on and try to help you.

0 1907012 2 days ago in reply to seilogramp

I accidentally deleted the file in my garmin connect, then I redownload again from my zWift activity and converted to fit file via fit file tools web, import the file to garmin connect but no response at all… the file size is only 372kb only