Text2Phonetics is a very handy site if you like to use phonemic script with your students. It can take a lot of the hard work out of transcribing text to phonetic symbols. You just paste in a short piece of text, click a button, and it does it for you.
You can then copy and paste the text into websites or documents, like the text below which I copied from Wikipedia. Here you can see how well it transcribes.
Download Text2Phonetics here