Preview (convert) Zebra ZPL output to image

I am creating a utility that allows our production floor the ability to adjust the printing of labels without getting into the actual code. This is easy enough to do (simply provide a way to adjust input parameters).
What would be really neat is if I could show them exactly what their changes do to the finished label (in real time) without them having to do a sample print. I am basically looking for a way to render the ZPL code into a viewable image so that they see on the screen what will be printed.
Anyone have any experience with this? I suppose I could create a full "compiler" of sorts that takes the ZPL code and converts it into an image (just like the actual printer does), but that seems like a LOT of effort. I'm hoping there's a utility out there that does something like this already.
Thanks!

Labelary offers a RESTful API for generating images/PDFs of ZPL. You'll need to allow for an external network connection, and you're relying on their uptime rather than just your own, but you should be able to add a Web Service to your project that sends off your ZPL and then receives the image. Alternatively, you could embed a browser window to preview the label content.
There are a couple of other possibilities - if you're using a networked Zebra printer you should be able to preview through the web management system. Alternatively, you could try finding a third party piece of software and point it at a temporary file with your label settings.
Edit - link, doh:
http://labelary.com/
CLD

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Moderator Message: Please use code tags when pasting code snippets. Also paste relevant portions of the code
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