Qt Reference Pages

All Classes: If you know the name of the class you want, find it here.

All Classes by Module: A list of all C++ API components in Qt 5

All Modules: A list of all modules in Qt 5.

All Namespaces: A Qt namespace contains enum types, functions, and sometimes classes.

All QML Basic Types: A list of QML basic types in this Qt release.

All QML Modules: A list of all QML modules in Qt 5.

All QML Types: A list of QML types in this Qt release.

Annotated Class List: If you don't know the name of the class you want, but you know what the class should do, you might try looking here.

Groups Of Related Classes: If you know what kind of class you want (GUI, painting, I.O, etc), look here.

Inheritance Hierarchy: The C++ class inheritance hierarchy for all classes in the Qt API.

Obsolete Classes: Classes and members marked obsolete that should not be used in new code.

Obsolete QML Types: A list of obsolete QML types that should not be used in new code.

<QFloat16>: The <QFloat16> header file provides 16-bit floating point support.

<QtAlgorithms>: The <QtAlgorithms> header includes the generic, template-based algorithms.

<QtEndian>: The <QtEndian> header provides functions to convert between little and big endian representations of numbers.

<QtGlobal>: The <QtGlobal> header file includes the fundamental global declarations. It is included by most other Qt header files.

<QtMath>: The <QtMath> header file provides various math functions.

All Functions: All documented Qt functions listed alphabetically with a link to where each one is declared.

The QML Reference

Qt Creator

Qt Linguist

Qt Assistant

Qt Designer

qmake

qdoc

Build with CMake

Qt for Device Creation

Qt Quick WebGL: A platform plugin that enables streaming or Qt Quick user interfaces using WebGL™.

Qt for Android: Provides information about Android support in Qt.

Qt for Embedded Linux: Provides information about Embedded Linux support in Qt.

Qt for INTEGRITY: Platform support for INTEGRITY.

Qt for Linux/X11: Platform support for Linux/X11.

Qt for QNX: Platform support for QNX. Platform and Compiler Notes

Qt for UWP: Running Qt applications on devices supporting the Universal Windows Platform (UWP).

Qt for VxWorks: Platform support for VxWorks.

Qt for WebAssembly: Runs Qt applications in a secure sandbox in the browser.

Qt for Windows: Platform support for Windows.

Qt for iOS: Provides insight into Qt's iOS port and how to use it.

Qt for macOS: Platform support for macOS.