Okular

The Universal Document Viewer

Multi-platform, fast and packed with features, Okular allows you to read PDF documents, comics and EPub books, browse images, visualize Markdown documents, and much more.

Screenshot of Okular
Illustration from David Revoy CC-BY-SA-4.0
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Support for Many Formats

Okular supports many formats, including PDF, EPub, DjVU and MD for documents; JPEG, PNG, GIF, Tiff, WebP for images; CBR and CBZ for comics; and many, many more.

See Format Compatibility table

Advanced User Interface


Okular has a wide range of features that lets you easily manage your documents.


A screenshot from Okular showing its annotation mode.

Annotate your PDFs


With Okular's 'Annotation mode', you can easily add inline and popup notes, highlight and underline text, or even add your own text.



Select and View any Text


With Okular's 'Selection mode', you can copy and paste almost anything from your documents to elsewhere. And, for those times the text you want to read is too small, you can use the 'Magnifier mode'.

Okular's 'Selection mode', with text, area and table selection options.
Okular's 'Text Magnifier' feature.

Okular's 'Content panel' auto renders a table of contents for a document.
Okular's 'Thumbnails panel' shows a thumbnail for each page of a document.

Your Content, at a Glance


Navigating your content is easier than ever. With Okular's 'Thumbnails panel', you can browse graphically the part of the document you were looking for. With the 'Content panel', find the chapter you need in all supported documents.


First-class Signature Support


You can view and verify digital signatures embedded in PDFs, check if they are still valid, and detect any modifications since the moment the document was signed. You can even sign PDFs yourself!

Okular showing a signed PDF.

Free Software

Okular is released under the GPLv2+, and is thus fully Free Software. Find the source code including guidance how to contribute in the Okular repository on KDE’s GitLab. Okular also fully respects your privacy, see all details in the KDE Software Privacy Policy.

Logo for the PDF freedom initiative

Latest News

Thursday, 12 August 2021

Okular 21.08 released

The 21.08 version of Okular has been released. This release contains various minor fixes and features all over. You can check the full changelog at https://kde.org/announcements/changelogs/gear/21.08.0/#okular. Okular 21.08 is a recommended update for everyone using Okular.
Thursday, 22 April 2021

Okular 21.04 released

The 21.04 version of Okular has been released. This release introduces Digital Signing of PDF files and various minor fixes and features all over. You can check the full changelog at https://kde.org/announcements/changelogs/releases/21.04.0/#okular. Okular 21.04 is a recommended update for everyone using Okular.
Thursday, 10 December 2020

Okular 20.12 released

The 20.12 version of Okular has been released. This release introduces various minor fixes and features all over. You can check the full changelog at https://kde.org/announcements/changelog-releases.php?version=20.12.0#okular. Okular 20.12 is a recommended update for everyone using Okular.
Thursday, 13 August 2020

Okular 1.11 released

The 1.11 version of Okular has been released. This release introduces a new annotation user interface and various minor fixes and features all over. You can check the full changelog at https://kde.org/announcements/changelog-releases.php?version=20.08.0#okular. Okular 1.11 is a recommended update for everyone using Okular.
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