How do I change a pdf file into a jpeg?

I have a photograph that is a pdf file, but would like to change it into a jpeg. Is this possible?How do I change a pdf file into a jpeg?
Here's a link to a simple program - http://jcay.org/php/software-and-servers



You can do some more research. Google ';pdf jpg conversion';.How do I change a pdf file into a jpeg?
Adobe Photoshop can do this, but if you don't want to spend any money...

Irfanview can do this as well.

Download here:

http://irfanview.com/