ProDiff is a software program designed to highlight the differences between versions of Application development source code. ProDiff improves on standard diff tools by parsing and pretty printing source code files before comparing the individual sections of the program or source code files. This approach removes many of the false positives created when files are reorganised but not syntactically changed. ProDiff displays the results of the parsed/pretty printed source code compared sections and displays them in a logical manner making the changes between the versions easier to locate and understand.