PNG

I am trying to make a calendar out of my designs but certain sites won't find the files as they are PNG, why is this and can i change it somehow please? Thank you

Emma, PNG files can be converted to JPG although there will be a differences with quality I would think. Just Google the three words for guide, you can even do it on line. Hope this helps. Make sure to use the "save as" and choose the type of file you want too.

Thank you