| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| Plans published | 1 | 1 |
| Spec score · PDF Readers | 8.3 (#9) | 7.2 (#20) |
| Annotations | Annotation mode adds inline and popup notes, highlighting, underlining and text. | Free text annotations are printed by default in version 51.0. |
| Latest release | The page announces Okular 26.08, released on 20 August 2026. | The page lists version 51.0, released on September 12, 2026. |
| License | Okular is released under the GPLv2+ and its source code is available in KDE's GitLab repository. | The app-specific content on the GNOME page is licensed GPL-2.0-or-later. |
