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Konqueror logo
Konqueror 4.11.5 as a web browser
Basic data

developer KDE
Publishing year October 14, 1996
Current  version 07/19/80
( July 20, 2019 )
operating system Unix derivatives ( GNU / Linux and others), Windows and embedded systems
programming language C ++
category Web browser and file manager etc.
License GNU GPL ( Free Software )
German speaking Yes
konqueror.org (English)

Konqueror is the free web browser of the K Desktop Environment ( KDE for short ). It can also be used as a file manager , FTP client or file viewer .


origin of the name

The name Konqueror is based on a mind game based on the names of previous generations of browsers: First there was the " Navigator " from Netscape, then the " Explorer " alias Internet Explorer from Microsoft and now the "Conqueror" - Konqueror.

The English word is spelled correctly Conqueror . A K instead of similar sounds has become the hallmark of KDE programs, for example also for the document viewer Okular or the digital photo management digiKam .

Konqueror as a web browser

Konqueror uses KHTML as a rendering engine , the split-off WebKit of which is also used in Apple's Safari web browser and, in the form of the WebKit-split Blink, in Google's Chrome and Opera from version 15. Thanks QtWebKit (since Qt 4.4 ) or QtWebEngine (since Qt 5.4 ) Konqueror but can range from the WebKit or Blink-porting Qt to use as rendering engine. Even with KHTML, Konqueror is an HTML 4.01 and HTML 5 compliant web browser with support for JavaScript (ECMA-262) and CSS2 & CSS3 ( Cascading Style Sheets ) as well as bidirectional fonts such as Arabic.

It supports the secure operation of Java mini programs ( applets ), Netscape plugins for Flash , RealAudio and Real Video as well as SSL for secure connections. The advanced functions include the automatic completion of URIs , the automatic completion of forms, the use of a spelling checker with free choice of language, the ability to import bookmarks from other browsers and the tab navigation familiar from other browsers .

Component structure (KParts)

Konqueror provides an interface through which numerous KDE programs can be embedded as components ( KParts ) using KDE's KParts technology . These components then provide the actual functionality.

Konqueror 3.5.1 as a file manager

In this way the Konqueror provides a file manager for the K Desktop Environment (KDE) with functions for file management. These range u. a. from simple cut / copy and paste operations to advanced searches of the file and directory structure . This is possible both in the network and locally. Directory contents can be displayed in a variety of ways in text and icon display modes. This includes thumbnail previews of file contents. File and directory properties can be easily examined and changed, and programs can be started with a click of the left mouse button.

Konqueror's internal start page refers to the various functions

Since KDE 4 (in some distributions - for example Kubuntu - also earlier) Konqueror has been replaced as the standard file manager by Dolphin , which is specially optimized for file management and is used by Konqueror as a component (KPart) for the file management functions.

KParts can also be used to integrate WebKit for displaying ( rendering ) HTML and SVG files, which improves support for (newer) web standards.

Konqueror is also a full-fledged FTP client, can easily handle Windows shares (provided Samba is installed in the system) and exchange files with a remote computer using the Secure Shell . He can also automatically access CVS repositories with his Cervisia module .

An excellent feature of Konqueror is the ability to divide each window or sub-window two or more times horizontally or vertically. Any content fits into any area. For example, files can be moved between different machines using "drag and drop" or texts and images can be copied from websites.

An SVG file, rendered in Konqueror

The Konqueror is a universal file viewer that can display images and other documents of various file formats using a KPart integrated viewer without having to start another program first . This is also achieved by embedding components (KParts) provided by other programs; KView for viewing images, kdvi for viewing DVI files, Kghostview for viewing PostScript documents and various KOffice applications for their respective document types. There is also the option of integrating OpenOffice.org as an engine for document viewing, as some distributions do not use Koffice by default. From version 3.2 of KDE, KSVG also has an integrated viewer for SVG files.


Konqueror can be adapted in many ways to meet user requirements. This affects the general style, the font and symbol sizes, the selection of symbols displayed in the menu bar, the number and space of the toolbars and the definition of new keyboard shortcuts. The various setting profiles can be saved so that they can be accessed quickly when required.


passing Acid2 test

The KHTML engine of Konqueror passes the Acid2 browser test from version 3.5 onwards. In the Acid3 browser test, Konqueror version 4.14.2 achieved the full points, but the words " YOU SHOULD NOT SEE THIS AT ALL " can be seen in the upper left corner.

KIO slaves

The KIO slave for access to connected digital cameras during operation (address prefix camera:/)

Many other resources besides HTTP can be accessed via certain pseudo addresses using integrated KIO slaves . In addition to specifying the protocol, the following other abbreviations can be entered as address prefixes in Konqueror's address line or KDE's file dialog: http://

Access to installed programs (offers the same options as the K menu)
Access to the APT cache
enables reading ( ripping ) and playing of audio CDs
shows an overview page generated from all bookmarks
Access to digital cameras
the "normal" file manager for accessing directories on the local computer
SSH client
FTP client ( wget )
Web browser
Web browser ( secure connection )
enables access to IMAP servers
enables encrypted access to IMAP servers
InfoPage browser
Browsing through directories shared in the LAN
provides access to an LDAP server (bsp .: ldap://, o=MeinLDAP)
enables access to an LDAP server ( secure connection )
Man page browser
(up to KDE 3.2 devices:/) shows all hard disks , partitions and integrated external storage media available on the local system such as USB sticks , USB hard disks and various other removable media
enables access to POP 3 servers
enables secure access to POP 3 servers
Remote access to MS Windows systems via the Remote Desktop Protocol
browse all shared resources (locally and in the network)
to configure the system (offers the same options as the KDE control center )
(up to KDE 3.2 slp:/) SLP client
SSH FTP (sub-system of SSH, further development of SCP)
browse through directories released via SMB
Access to Subversion - repositories
Overview of the system and connected drives (modern view for workstation)
Access to the trash can
WebDAV client
WebDAV client ( secure connection )

This list can be expanded with further additional packages, for example for ftps://orpackage://


Another feature are the web shortcuts with which a search engine query can be started directly from the address bar. In addition to some preset commands, you can also create your own search commands.


Konqueror was introduced in KDE in version 2, which was released on October 23, 2000. Konqueror replaced the KDE file manager (KFM) as the standard file manager. In KDE 4 (released August 18, 2006), Konqueror was replaced by Dolphin as the default file manager . Konqueror continues to offer file manager functionality by integrating Dolphin as a KPart .

Web links

Commons : Konqueror  - collection of images, videos and audio files

Individual evidence

  1. cgit.kde.org .
  2. The KDE Windows Project ( Memento from January 27, 2016 in the Internet Archive ) (English) - last message on May 3, 2013; last accessed on February 1, 2016
  3. The Konqueror open source project on Open Hub: Languages Page . In: Open Hub . (accessed on July 14, 2018).
  4. Konqueror as a web browser - on the Ubuntuusers Wiki; accessed on February 1, 2016.
  5. Canon Digital IXUS: IXUS and Linux - section on page 153; Helmut Neumann , 2nd revised edition, 2008
  6. KDE 2.0 Release Announcement (English) - KDE.org , October 23, 2000.