Research any topic before you write.
Find related topics. | Discover entities. | See connections. | Build a topical map.
Xpdf is a free and open-source PDF viewer and toolkit based on the Qt framework. Versions prior to 4.00 were written for the X Window System and Motif.
Functions, Exploit & Xpdf-utils
Explore the main themes, entities and connections around Xpdf. Start with the topic map, then use the sections below for research and deeper semantic analysis.
Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Browse the full topic structure. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
See the strongest relationship patterns around the current topic before diving into the raw triples.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
pdf system windows viewer also operating linux version programs x11 free open-source based versions window xpdf-utils drm amigaos amipdf ios
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Xpdf | Developers | Glyph & Cog | 1.00 | infobox |
| Xpdf | License | GPL-2.0-only or GPL-3.0-only or proprietary | 1.00 | infobox |
| Xpdf | Operating system | Linux, Windows, macOS, FreeBSD, OpenVMS | 1.00 | infobox |
| Xpdf | Release | December 12, 1995; 30 years ago (1995-12-12) | 1.00 | infobox |
| Xpdf | Stable release | 4.06 / 14 November 2025 | 1.00 | infobox |
| Xpdf | Type | PDF viewer | 1.00 | infobox |
| Xpdf | Website | xpdfreader.com | 1.00 | infobox |
| Xpdf | is a | free and open-source PDF viewer and toolkit based on the Qt framework | 0.90 | text |
| KPDF | instance of | Linux and Unix.Xpdf is also used as a back-end for other PDF readers frontends | 0.80 | text |
| GPDF | instance of | Linux and Unix.Xpdf is also used as a back-end for other PDF readers frontends | 0.80 | text |
| and its engine | instance of | Linux and Unix.Xpdf is also used as a back-end for other PDF readers frontends | 0.80 | text |
| without the X11 display components | instance of | Linux and Unix.Xpdf is also used as a back-end for other PDF readers frontends | 0.80 | text |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.