All Modules¶

A list of all modules in Qt 6.

Qt consists of essential modules, add-on modules, and tools.

Qt Essentials¶

Qt Essentials define the foundation of Qt on all platforms. They are available on all supported development platforms and on the tested target platforms. Except the testing modules, which will remain source compatible, these modules will remain source and binary compatible throughout Qt 6.

Essential modules are general and useful for a majority of Qt applications. A module that is used for a special purpose is considered an add-on module even if it is available on all supported platforms.

Qt Core

Core non-graphical classes used by other modules.

Qt D-Bus

Classes for inter-process communication over the D-Bus protocol.

Qt GUI

Base classes for graphical user interface (GUI) components.

Qt Network

Classes to make network programming easier and more portable.

Qt Qml

Classes for QML and JavaScript languages.

Qt Quick

A declarative framework for building highly dynamic applications with custom UIs.

Qt Quick Controls

Lightweight QML types for creating performant user interfaces for desktop, embedded, and mobile devices.

Qt Quick Dialogs

Types for creating and interacting with system dialogs from a Qt Quick application.

Qt Quick Layouts

Layouts are items that are used to arrange Qt Quick 2 based items in the user interface.

Qt Quick Test

A unit test framework for QML applications, where the test cases are written as JavaScript functions.

Qt Test

Classes for unit testing Qt applications and libraries.

Qt Widgets

Classes to extend Qt GUI with C++ widgets.

Note

The binary compatibility guarantee does not apply to Qt Test and Qt Quick Test modules. However, they will remain source compatible.

Qt Add-Ons¶

Qt Add-On modules bring additional value for specific purposes. These modules may only be available on some development platform. Many add-on modules are either feature-complete and exist for backwards compatibility, or are only applicable to certain platforms. Each add-on module specifies its compatibility promise separately.

The Qt installers include the option of downloading the add-ons. For more information, visit the Getting Started with Qt page.

Active Qt

Classes for applications which use ActiveX and COM (Windows only).

Qt Bluetooth

Provides access to Bluetooth hardware.

Qt CoAP

Implements the client side of CoAP defined by RFC 7252.

Qt Concurrent

Classes for writing multi-threaded programs without using low-level threading primitives.

Qt Graphs

Provides functionality for visualizing data in 3D as bar, scatter, and surface graphs, as well as 2D in area, bar, donut, line, pie, scatter, and spline graphs.

Qt GRPC

Provides an ability to generate Qt-based classes from protobuf specifications used to communicate with gRPC® services.

Qt Help

Classes for integrating documentation into applications.

Qt HTTP Server

A framework for embedding an HTTP server into a Qt application.

Qt Image Formats

Plugins for additional image formats: TIFF, MNG, TGA, WBMP.

Qt Lottie Animation

A QML API for rendering graphics and animations in JSON format, exported by the Bodymovin plugin for Adobe® After Effects.

Qt MQTT

Provides an implementation of the MQTT protocol specification.

Qt Multimedia

A rich set of QML types and C++ classes to handle multimedia content. Also includes APIs to handle camera access.

Qt Network Authorization

Provides support for OAuth-based authorization to online services.

Qt NFC

Provides access to Near-Field communication (NFC) hardware. On desktop platforms NDEF access is only supported for Type 4 tags.

Qt OPC UA

Protocol for data modeling and exchange of data in industrial applications.

Qt OpenGL

C++ classes that make it easy to use OpenGL in Qt applications. A separate library (Qt OpenGL Widgets) provides a widget for rendering OpenGL graphics.

Qt Positioning

Provides access to position, satellite info and area monitoring classes.

Qt Print Support

Classes to make printing easier and more portable.

Qt Protobuf

Provides an ability to generate Qt-based classes from protobuf specifications.

Qt Quick 3D

Provides a high-level API for creating 3D content or UIs based on Qt Quick.

Qt Quick 3D Physics

Qt Quick 3D Physics provides a high-level QML module adding physical simulation capabilities to Qt Quick 3D.

Qt Quick Widgets

Provides a C++ widget class for displaying a Qt Quick user interface.

Qt Quick Effects

Provides QML types for applying one or more simple graphical effects to Qt Quick items.

Qt Quick Particles

Provides QML types for particle effects.

Qt Quick Timeline

Enables keyframe-based animations and parameterization.

Qt Remote Objects

Provides an easy to use mechanism for sharing a QObject’s API (Properties/Signals/Slots) between processes or devices.

Qt SCXML

Provides classes and tools for creating state machines from SCXML files and embedding them in applications.

Qt Sensors

Provides access to sensor hardware on Android, iOS, and Windows platforms.

Qt Serial Bus

Provides access to serial industrial bus interfaces. Currently, the module supports the CAN bus and Modbus protocols.

Qt Serial Port

Provides classes to interact with hardware and virtual serial ports.

Qt Shader Tools

Provides tools for the cross-platform Qt shader pipeline. These enable processing graphics and compute shaders to make them usable for Qt Quick and other components in the Qt ecosystem.

Qt Spatial Audio

Provides support for spatial audio. Create sound scenes in 3D space containing different sound sources and room related properties such as reverb.

Qt SQL

Classes for database integration using SQL.

Qt State Machine

Provides classes for creating and executing state graphs.

Qt SVG

Classes for displaying the contents of SVG files. Supports a subset of the SVG 1.2 Tiny standard. A separate library (Qt SVG Widgets) provides support for rendering SVG files in a widget UI.

Qt TextToSpeech

Provides support for synthesizing speech from text and playing it as audio output.

Qt UI Tools

Classes for loading QWidget based forms created in Qt Widgets Designer dynamically, at runtime.

Qt Virtual Keyboard

A framework for implementing different input methods as well as a QML virtual keyboard. Supports localized keyboard layouts and custom visual themes.

Qt Wayland Compositor

Provides a framework to develop a Wayland compositor on Linux and Boot to Qt targets.

Qt WebChannel

Provides access to QObject or QML objects from HTML clients for seamless integration of Qt applications with HTML/JavaScript clients.

Qt WebSockets

Provides WebSocket communication compliant with RFC 6455.

Qt WebView

Displays web content in a QML application by using APIs native to the platform, without the need to include a full web browser stack.

Qt XML

Handling of XML in a Document Object Model (DOM) API.

Qt 5 Compatibility APIs: Graphical Effects

Qt Graphical Effects module from Qt 5 provided for compatibility.

Qt 5 Core Compatibility APIs

Qt Core APIs that were in Qt 5 but not Qt 6.

Qt Add-Ons in Technical Preview¶

The following add-ons are still in development, but are available as technology previews:

Qt Location

Provides QML and C++ interfaces to create location-aware applications.

Qt Extension Modules¶

Qt Extension Modules bring additional functionality to Qt. They may be part of a given Qt release, but can deviate from the other Qt modules in terms of release schedule, platform support, the binaries Qt provides, commercial support, or compatibility promises. You can find specific details in the module documentation for each Extension Module.

Qt WebEngine

Classes and functions for embedding web content in applications using the Chromium browser project.

Qt PDF

Classes and functions for rendering PDF documents on desktop platforms.

Where to Go from Here¶

We invite you to explore the rest of Qt. We prepared overviews which help you decide which APIs to use and our examples demonstrate how to use our API.

Qt Overviews - list of topics about application development

Examples and Tutorials - code samples and tutorials

Qt Reference Pages - a listing of C++ and QML APIs

Changes to Supported Modules - status of Qt 5 modules in Qt 6.0

Qt Core	Core non-graphical classes used by other modules.
Qt D-Bus	Classes for inter-process communication over the D-Bus protocol.
Qt GUI	Base classes for graphical user interface (GUI) components.
Qt Network	Classes to make network programming easier and more portable.
Qt Qml	Classes for QML and JavaScript languages.
Qt Quick	A declarative framework for building highly dynamic applications with custom UIs.
Qt Quick Controls	Lightweight QML types for creating performant user interfaces for desktop, embedded, and mobile devices.
Qt Quick Dialogs	Types for creating and interacting with system dialogs from a Qt Quick application.
Qt Quick Layouts	Layouts are items that are used to arrange Qt Quick 2 based items in the user interface.
Qt Quick Test	A unit test framework for QML applications, where the test cases are written as JavaScript functions.
Qt Test	Classes for unit testing Qt applications and libraries.
Qt Widgets	Classes to extend Qt GUI with C++ widgets.

Active Qt	Classes for applications which use ActiveX and COM (Windows only).
Qt Bluetooth	Provides access to Bluetooth hardware.
Qt CoAP	Implements the client side of CoAP defined by RFC 7252.
Qt Concurrent	Classes for writing multi-threaded programs without using low-level threading primitives.
Qt Graphs	Provides functionality for visualizing data in 3D as bar, scatter, and surface graphs, as well as 2D in area, bar, donut, line, pie, scatter, and spline graphs.
Qt GRPC	Provides an ability to generate Qt-based classes from protobuf specifications used to communicate with gRPC® services.
Qt Help	Classes for integrating documentation into applications.
Qt HTTP Server	A framework for embedding an HTTP server into a Qt application.
Qt Image Formats	Plugins for additional image formats: TIFF, MNG, TGA, WBMP.
Qt Lottie Animation	A QML API for rendering graphics and animations in JSON format, exported by the Bodymovin plugin for Adobe® After Effects.
Qt MQTT	Provides an implementation of the MQTT protocol specification.
Qt Multimedia	A rich set of QML types and C++ classes to handle multimedia content. Also includes APIs to handle camera access.
Qt Network Authorization	Provides support for OAuth-based authorization to online services.
Qt NFC	Provides access to Near-Field communication (NFC) hardware. On desktop platforms NDEF access is only supported for Type 4 tags.
Qt OPC UA	Protocol for data modeling and exchange of data in industrial applications.
Qt OpenGL	C++ classes that make it easy to use OpenGL in Qt applications. A separate library (Qt OpenGL Widgets) provides a widget for rendering OpenGL graphics.
Qt Positioning	Provides access to position, satellite info and area monitoring classes.
Qt Print Support	Classes to make printing easier and more portable.
Qt Protobuf	Provides an ability to generate Qt-based classes from protobuf specifications.
Qt Quick 3D	Provides a high-level API for creating 3D content or UIs based on Qt Quick.
Qt Quick 3D Physics	Qt Quick 3D Physics provides a high-level QML module adding physical simulation capabilities to Qt Quick 3D.
Qt Quick Widgets	Provides a C++ widget class for displaying a Qt Quick user interface.
Qt Quick Effects	Provides QML types for applying one or more simple graphical effects to Qt Quick items.
Qt Quick Particles	Provides QML types for particle effects.
Qt Quick Timeline	Enables keyframe-based animations and parameterization.
Qt Remote Objects	Provides an easy to use mechanism for sharing a QObject’s API (Properties/Signals/Slots) between processes or devices.
Qt SCXML	Provides classes and tools for creating state machines from SCXML files and embedding them in applications.
Qt Sensors	Provides access to sensor hardware on Android, iOS, and Windows platforms.
Qt Serial Bus	Provides access to serial industrial bus interfaces. Currently, the module supports the CAN bus and Modbus protocols.
Qt Serial Port	Provides classes to interact with hardware and virtual serial ports.
Qt Shader Tools	Provides tools for the cross-platform Qt shader pipeline. These enable processing graphics and compute shaders to make them usable for Qt Quick and other components in the Qt ecosystem.
Qt Spatial Audio	Provides support for spatial audio. Create sound scenes in 3D space containing different sound sources and room related properties such as reverb.
Qt SQL	Classes for database integration using SQL.
Qt State Machine	Provides classes for creating and executing state graphs.
Qt SVG	Classes for displaying the contents of SVG files. Supports a subset of the SVG 1.2 Tiny standard. A separate library (Qt SVG Widgets) provides support for rendering SVG files in a widget UI.
Qt TextToSpeech	Provides support for synthesizing speech from text and playing it as audio output.
Qt UI Tools	Classes for loading QWidget based forms created in Qt Widgets Designer dynamically, at runtime.
Qt Virtual Keyboard	A framework for implementing different input methods as well as a QML virtual keyboard. Supports localized keyboard layouts and custom visual themes.
Qt Wayland Compositor	Provides a framework to develop a Wayland compositor on Linux and Boot to Qt targets.
Qt WebChannel	Provides access to QObject or QML objects from HTML clients for seamless integration of Qt applications with HTML/JavaScript clients.
Qt WebSockets	Provides WebSocket communication compliant with RFC 6455.
Qt WebView	Displays web content in a QML application by using APIs native to the platform, without the need to include a full web browser stack.
Qt XML	Handling of XML in a Document Object Model (DOM) API.
Qt 5 Compatibility APIs: Graphical Effects	Qt Graphical Effects module from Qt 5 provided for compatibility.
Qt 5 Core Compatibility APIs	Qt Core APIs that were in Qt 5 but not Qt 6.

Qt WebEngine	Classes and functions for embedding web content in applications using the Chromium browser project.
Qt PDF	Classes and functions for rendering PDF documents on desktop platforms.