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Okular

Okular is a free cross-platform document viewer developed by the KDE community based on the Qt and KDE Frameworks libraries. It is distributed as part of the KDE Applications bundle. It replaced KPDF, its main predecessor, alongside KGhostView, KFax, KFaxview and KDVI in KDE 4. Its functionality can be embedded in other applications.

History, Art & Measurement

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Research this topic

Explore the main themes, entities and connections around Okular. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Developer
KDE
License
GPL-2.0-only or GPL-3.0-only
Operating system
Linux and Windows
Original author
Piotr Szymański
Release
2005; 21 years ago (2005)
Repository
invent.kde.org/graphics/okular

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

History

Okular for Windows

Features

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Okular

Nodes40
Edges39
Triples32
Avg. degree1.95
Density0.05
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Okular

Top relations

related to Features · 9
Okular → Alongside, Annotations, Jovie, Okular's, Other, PDF, Poppler, Qt, Qt Speech
related to history · 9
Okular → Code, December, Google Summer, In, Piotr Szymański, Qt, Season, Usability, When
related to Okular for Windows · 2
Okular → Microsoft Store As, Windows
Developer · 1
Okular → KDE
License · 1
Okular → GPL-2.0-only or GPL-3.0-only
Operating system · 1
Okular → Linux and Windows
Original author · 1
Okular → Piotr Szymański
Release · 1
Okular → 2005; 21 years ago (2005)
Repository · 1
Okular → invent.kde.org/graphics/okular
Stable release · 1
Okular → 26.04.0 / 9 April 2026; 4 months ago (9 April 2026)

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

kde pdf document file windows qt viewer version applications features website free since software text based part alongside formats also

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
OkularDeveloperKDE1.00infobox
OkularLicenseGPL-2.0-only or GPL-3.0-only1.00infobox
OkularOperating systemLinux and Windows1.00infobox
OkularOriginal authorPiotr Szymański1.00infobox
OkularRelease2005; 21 years ago (2005)1.00infobox
OkularRepositoryinvent.kde.org/graphics/okular1.00infobox
OkularStable release26.04.0 / 9 April 2026; 4 months ago (9 April 2026)1.00infobox
OkularTypeUniversal document viewer1.00infobox
OkularWebsiteokular.kde.org1.00infobox
OkularWritten inC++1.00infobox
Okularis afree cross-platform document viewer developed by the KDE community based on the Qt and KDE Frameworks libraries0.90text
Okularrelated to External linksOfficial0.60section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
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