- Qt 6.6
- Changes to Qt Modules in Qt 6
- Qt 6.6.2 Reference Documentation

# Changes to Qt Modules in Qt 6

Qt 6 is a result of the conscious effort to make the framework more efficient and easy to use.

We try to maintain binary and source compatibility for all the public APIs in each release, but some changes were inevitable in an effort to make Qt a better framework. Below you can find a list of changes that may affect your application, and which can help you transitioning from Qt 5 to Qt 6.

For information about changes specific to a Qt 6 release, visit What's new in Qt 6.

Changes to Qt Bluetooth | Migrate QtBluetooth to Qt 6
Changes to Qt Charts | Migrate Qt Charts to Qt 6
Changes to Qt Concurrent | Improved to work with a variable number of arguments
Changes to Qt Core | Changes to containers, strings, serialization and I/O classes
Changes to Qt D-Bus | Minimal porting effort to be able to switch to Qt 6
Changes to Qt Extras Modules | Changes to Qt Mac Extras, Qt Windows Extras, and Qt X11 Extras.
Changes to Qt GUI | Kernel, Text, Painting, and Utility classes are modified
Changes to Qt Location | Migrate Qt Location to Qt 6
Changes to Qt Multimedia | Migrate Qt Multimedia to Qt 6
Changes to Qt NFC | Migrate Qt NFC to Qt 6
Changes to Qt Network | Migrate Qt Network to Qt 6
Changes to Qt OpenGL | QOpenGL classes migrated, QOpenGLWidget class has been moved to Qt OpenGL Widgets
Changes to Qt Positioning | Migrate Qt Positioning to Qt 6
Changes to Qt Print Support | General API consolidation
Changes to Qt QML | Migrate Qt QML to Qt 6
Changes to Qt Quick | Migrate Qt Quick to Qt 6
Changes to Qt Quick 3D | Migrate Qt Quick 3D to Qt 6
Changes to Qt Quick Controls | Migrate Qt Quick Controls to Qt 6
Changes to Qt Quick Labs Platform | Migrate Qt Quick Labs Platform to Qt 6
Changes to Qt Quick Test | Migrate Qt Quick Test to Qt 6
Changes to Qt Quick Timeline | Migrate Qt Quick Timeline to Qt 6
Changes to Qt Remote Objects | Migrate Qt Remote Objects to Qt 6
Changes to Qt SCXML | Migrate Qt SCXML to Qt 6
Changes to Qt SQL | Return type for boundValues() has been changed in QSqlQuery class
Changes to Qt SVG | Migrate Qt SVG to Qt 6
Changes to Qt Sensors | Migrate Qt Sensors to Qt 6
Changes to Qt SerialBus | Migrate Qt SerialBus to Qt 6
Changes to Qt SerialPort | Migrate Qt SerialPort to Qt 6
Changes to Qt State Machine | Migrate Qt State Machine to Qt 6
Changes to Qt Test | Touch-related functionality changes
Changes to Qt TextToSpeech | Migrate Qt TextToSpeech to Qt 6
Changes to Qt WebChannel | Migrate Qt WebChannel to Qt 6
Changes to Qt WebEngine | Migrate Qt WebEngine to Qt 6
Changes to Qt WebSockets | Migrate Qt WebSockets to Qt 6
Changes to Qt WebView | Migrate Qt WebView to Qt 6
Changes to Qt Widgets | Changes in Kernel classes, Widgets, ItemViews, and Utility Classes
Changes to Qt XML | Use QXmlStreamReader for reading XML files

## Related Topics

- Porting C++ Applications to Qt 6 using Clazy checks
- Changes to Supported Modules - status of Qt 5 modules in Qt 6.0
- Build System Changes in Qt 6