how can I rotate a picture taken with my iphone?

I already had this problem before, and I have no idea how to solve it - I took this picture with my iphone. It rotates the picture automatically on the phone, but when I try to upload it to the website it's not rotated. When I try to rotate it again before uploading it doesn't work either. 

Picture of how can I rotate a picture taken with my iphone?
nemalim (author) 5 years ago
another try - I rotated it to the other side and saved it again. not sure why but this time it worked!
Thanks for your help
nemalim (author) 5 years ago
trying again - as you recommended
nemalim (author) 5 years ago
thanks for your answer.
that's what I did. I use a mac, and when I get the file on the computer it's already rotated (=looks ok). If I try rotating again it will appear rotated when I upload it.
Kiteman5 years ago
Email it to yourself, then use your file management software to rotate it, then save & upload to the site.