Okular

Okular showing a PDF in KDE 4
Developer(s)	The Okular Team
Stable release	0.9.4 / 2009-12-01; 25 days ago
Platform	Cross-platform
Type	Universal document viewer
License	GNU General Public License
Website	okular.kde.org

Okular is the document viewer for KDE 4 (although it does not require the full KDE desktop). It is based on KPDF and it replaced KPDF, KGhostView, KFax, KFaxview, KDVI in KDE 4. Its functionality can be easily embedded in other applications.

Okular was started for the Google Summer of Code of 2005; Piotr Szymanski was the accepted student^[1][2].

Okular was identified as a success story of the 2007 Season of Usability^[3]. In this season the Okular toolbar mockup was created based on an analysis of other popular document viewers and a usage survey.

Okular has additional features, including commenting on pdf documents, highlighting and drawing lines, geometric shapes, adding textboxes, and stamps.^{[citation needed]}. It allows to select a part of the document and save it as text, or in an image format.

It supports the following file formats^[4]:

• Portable Document Format (PDF) with the Poppler backend
• PostScript with the libgs backend (Okular 0.6/KDE 4.0) / libspectre backend (Okular >= 0.7/KDE >= 4.1)
• Tagged Image File Format (TIFF) with the libTIFF backend
• Microsoft Compiled HTML Help (CHM) with the libCHM backend
• DjVu with the DjVuLibre backend
• Device independent file format (DVI)
• XML Paper Specification (XPS)
• OpenDocument format (ODF)
• FictionBook
• ComicBook
• Plucker
• EPUB
• Mobipocket
• Various image formats.

[edit] See also

Free software portal

• List of PDF software
• Evince - the counterpart PDF viewer for GNOME.

[edit] References