Download free DiffPDF 6.0.6 on our website. The most popular versions of this tool that our community members download are 5.6, 5.3 and 5.2. Notice that it can be launched on the following OSs: Windows XP/7 32-bit. It refers to Productivity, according to its main purpose. The copyright holder of this tool is Qtrac Ltd. Our antivirus system always scans the downloadable files for spyware. It scanned it and reported that it is clean to use. It is a tool which is commonly known as diffpdf.exe.