Other features include SQL database access, XML parsing, JSON parsing, thread management and network support. With Qt Quick, rapid application development for mobile devices became possible, while logic can still be written with native code as well to achieve the best possible performance. Qt also provides Qt Quick, that includes a declarative scripting language called QML that allows using JavaScript to provide the logic. Qt supports various compilers, including the GCC C++ compiler, the Visual Studio suite, PHP via an extension for PHP5, and has extensive internationalization support. An example of such a non-GUI program using Qt is the Cutelyst web framework. Non-GUI programs can also be developed, such as command-line tools and consoles for servers.

Most GUI programs created with Qt have a native-looking interface, in which case Qt is classified as a widget toolkit. Qt is used for developing graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and mobile or embedded platforms.

Qt is available under both commercial licenses and open-source GPL 2.0, GPL 3.0, and LGPL 3.0 licenses. Qt is currently being developed by The Qt Company, a publicly listed company, and the Qt Project under open-source governance, involving individual developers and organizations working to advance Qt. Qt (pronounced 'cute' or as an initialism) is free and open-source cross-platform software for creating graphical user interfaces as well as cross-platform applications that run on various software and hardware platforms such as Linux, Windows, macOS, Android or embedded systems with little or no change in the underlying codebase while still being a native application with native capabilities and speed.

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