Readdle's PDF Converter will do just that. It takes pretty much any file on your iPad and turns it into a PDF. There are a few hard-to-use web services that will do this for you, but PDF Converter takes care of everything on the iPad itself. This is both more secure, and way more convenient.
There are lots of ways to get documents into the converter. The main one is to use the “Open with” command in other applications (like Dropbox, Mail or MobileMe). Supported document types can then be sent to the app, where you can do the actual conversion. The app will open Word, Excel, Powerpoint, Pages, Numbers, Keynote, TXT, HTML, JPG and PNG files. Once converted to PDF, you can store them in the app itself or open them in your favorite PDF reader.
You can also convert any image saved in your Photos app, or even put together a PDF containing the contact details of single or multiple entries in your contacts list.
But the biggest feature is the conversion of web pages. When you find a page you want to convert — an online form, say, or a flight boarding pass — just tap the URL bar and add “PDF” (without quotes) in front of the “HTTP” prefix. Hit return and the page opens up in PDF Converter, ready for action.
This is great. I use it like this: In my Spanish classes, I take a snap of the whiteboard with the iPad camera (or my actual camera, if I want to actually read anything). I then convert to PDF and open in the PDF Highlighter app. From there, I can add highlights and notes on top.
PDF Converter costs $7. Available now.
PDF Converter [Readdle]
source: Gadget Lab