Okular Historical background Okular is the successor of kpdf, the PDF viewer in KDE 3. kpdf was refactored and extended in a Google Summer of Code project to support not only viewing PDF but also other types of document, e.g. PostScript files, images and many more. This file is part of the KDE documentation. Documentation copyright © 1996-2020 The KDE developers. Generated on Mon Jul 6 2020 22:35:33 by doxygen 1.8.11 written by Dimitri van Heesch, © 1997-2006 KDE's Doxygen guidelines are available online.