All the essential Qt tools for all stages of Software Development Lifecycle: planning, design, development, testing, and deployment.

Qt为软件开发全周期各阶段提供全套必备工具：规划、设计、开发、测试与部署。

The Future of Digital Experiences Welcome to the documentation pages for Qt, the cross-platform software development framework.

Qt's support for different Windows platforms is extensive and mature. To download and install Qt for Windows, follow the instructions on the Getting Started with Qt page.

You can use Qt Online Installer and Qt Maintenance Tool via a graphical user interface or a command line interface. The command line interface enables installing and uninstalling without …

Note: This is an archive of historical versions, which may contain known errors and security vulnerabilities.

The Qt Widgets Module provides a set of UI elements to create classic desktop-style user interfaces. See the User Interfaces overview for more information on using widgets.

Note: This is an archive of historical versions, which may contain known errors and security vulnerabilities.

If the selected font does not contain a certain character, Qt automatically chooses a similar-looking fallback font that contains the character. By default this is done on a character-by …

Qt's support for different Linux platforms is extensive and mature. To download and install Qt for Linux, follow the instructions on the Getting Started with Qt page.