XY coordinates generator for images

[Nicolas_Feldman]

Hi everyone, so I found this XY generator for images online:
https://www.mobilefish.com/services/record_mouse_coordinates/record_mouse_coordinates.php

You can upload your image, then select the pixels you want, and it will generate an XY table like this:

I used that data for the XY column of the Background Image in my app, but the pins are not shown.

Can anyone tell me if XY coordinates generated are correct, can they be referenced to the pixel? Or do the coordinates always have to be georeferenced¿

Thanks!