Object is flipped after upload

This is my first time delving into 3dmodeling and such, so I am quite new at this.
I recently finished my first model, this model received an error by the program. And that might be needed, but when the model is viewed on the site it’s flipped over.
I have checked a lot of different ways of viewing the obj. file and this website is the only one that flips it
I have no idea or clue what to do. Either I have done something to make the program believe the file is best made this way or this issue is out of my hands…

Model%20flipped

Hello,

Different axes are used as a bottom plane in different software. Thus, the model can be flipped in the preview, but the orientation of the model in 3D file will not be changed. However our production specialists will choose the best possible one within the build of the 3D printer.

Best regards,
Tetiana
Customer Support Engineer