Garmin Connect will not allow me to create segments at the moment

This is a known issue currently being discussed, though the topic makes it a bit tricky to locate. - crea allenamenti - Garmin Connect Web - Mobile Apps & Web - Garmin Forums

I’ve already reported it to Garmin, but it might be a good idea for you to do the same - https://support.garmin.com.

seilogramp said:

I opened a case with Garmin Product Support using the chat option:

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seilogramp: Whenever I attempt to create a segment in Garmin Connect Web, I am unable to complete it because the page goes blank as soon as I set the segment length. This issue occurs regardless of the browser I use—Edge, Chrome, or Firefox. I have cleared the cache and cookies, tried a different computer, and used incognito mode, but the problem persists.

Steps to reproduce:

• Open a running activity
• Navigate to the segments tab
• Click on "Create Segment"
• Modify the "Segment Start/End" by moving the slider or using the arrows

The page instantly turns blank

Garmin Support: Ok, what well need you to do is take a video of you trying to create this segment for the running activity and upload it to this link. Sending a File, Folder, Photo, or Video to Garmin Product Support.

seilogramp: done

Garmin Support: We have successfully created and submitted the investigation on this issue. Our engineers will soon be able to take a look at this to see why it is happening and what we can do to resolve this. I will remain in contact with you via email based on any updates, information we need, or resolutions on this.

I have the same problem. Page just went blank. Keep me in loop fir the solution. Thank You. 

Me too, cycling or running activity. Suggests a systemic issue. Mac OS Sequoia 15.7.3, occurs with Safari or Chrome/Brave.

Same problem here.

macOS 26.2, I tried Safari, Firefox, and Chrome, all of them reproduced the problem described.

Same here. Tried Chrome and Safari with the same result on each. Brief search on the issue suggested a browser cache issue - I tried using the recommended corrective steps on the chrome browser with no effect. 

I'll assume Garmin is aware of it at this point, so fingers crossed!

Rozzy771 said:

I'll assume Garmin is aware of it at this point

I’ve opened a case as mentioned earlier, but if more customers submit tickets, it could help speed things up; otherwise, they might just see it as a one-off.

I sent an email to them too. 

I have contatacted Garmin support as well and they do everything they can to dismiss you. ask for explanation, then screenshot, then a video, while they also send you the manual for how to create segments. It's ridicoulous.

I have a solution that takes a bit of work:

- I download the gpx file of the activity from which I want to create a segment.
- I load it into https://gpx.studio/ (free, no accounts needed) 
- crop the activity to the segment and export it
- I asked gemini to write me a script to converts gpx to the format of the segments in garmin
- run the script with the cropped gpx, use the output in postman with the correct authorisation headers

you need to start from the gpx/tcx because the garmin system requires the coordinates to correspond to an activity of yours + you need the id of that activity when submitting your segment.

it's a bit of a hassle to set up but I created about 5 segments in a row this way yesterday relatively quickly. There are most probably more streamlined ways to do it but I didn't have the time to put into it. (you could make the python script send the json data directly for example)

this is the POST request that needs to be sent to garmin to save a segment:
POST https://connect.garmin.com/gc-api/segment-service/segment/

POST /gc-api/segment-service/segment/ HTTP/1.1
Host: connect.garmin.com
accept: */*
accept-language: nl-BE,nl;q=0.9,en-AU;q=0.8,en;q=0.7,nl-NL;q=0.6,en-US;q=0.5
connect-csrf-token: A TOKEN, can be found in the devtools of your browser (F12 when logged in on the garmin connect page)
content-type: application/json
origin: https://connect.garmin.com
priority: u=1, i
sec-ch-ua: "Not(A:Brand";v="8", "Chromium";v="144", "Google Chrome";v="144"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Windows"
sec-fetch-dest: empty
sec-fetch-mode: cors
sec-fetch-site: same-origin
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36
Cookie: PUT THE COOKIE OF YOUR CURRENT GARMIN CONNECTION HERE (F12 in the browser)
Content-Length: 41621

{
    "distance": 0.250,
    "name": "Segment name",
    "grade": 7.05,
    "surfaceTypePk": 2,
    "activityId": "ACTIVITY ID HERE (check your browser URL)",
    "activityTypePk": 1,
    "classificationPk": 11,
    "geoPoints": [
        {
            "latitude": 51.5496532158,
            "longitude": 3.3249681365,
            "elevation": 10,
            "distance": 0.0,
            "timestamp": 1770000000000
        },
        {
            "latitude": 51.5496532158,
            "longitude": 3.3249681365,
            "elevation": 10,
            "distance": 0.0,
            "timestamp": 1770000000000
        },
		....
    ]
}

to find the cookie and all that you can just save a segment in garmin connect from your complete activity while having devtools open (F12) and then look for this post request

you can use the json in this code fragment to ask Gemini (or another tool) to create you a python (or other language) script for conversion from gpx to that json format

I asked it "give me a python script that reads a .gpx file and outputs json in this format: [example of json format here]" but still had to provide a way to calculate the grade

Same I've opened one as well hopefully they'll et it sorted