This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Assuming that you are asking about converting an HTML page to PDF, then no, iText does not support this. iText is used through its API - it does not have any converters built in that can read other file formats.