How do I make a .xcf image upload on an image hosting site?

[Locket]

With GIMP on a mac, it saves an image as an .xcf. Sometimes, it uploads, sometimes it doesn't. I really want to post something and don't want to re-do it. Can I make it upload?

 

[Money Hunter]

Don't save it as xcf. Save it as .png

File ---> Export As... ---> Filename.png

 

[Locket]

Don't save it as xcf. Save it as .png

File ---> Export As... ---> Filename.png

I can't it says you can only save it as a .xcf

 

[Money Hunter]

I can't it says you can only save it as a .xcf

Don't do Save as do Export As