What PDF versions do Appligent products support? April 30, 2013 / Judi / FAQ, FAQ Redax, FAQ StampPDF All Appligent products support PDF file versions 1.2, 1.3, 1.4, 1.5, 1.6, 1.7 and above. FAQ Redax OtherFAQ StampPDF OtherStampPDF InstallationStampPDF Support