You can use the QML live preview to preview a QML file or the entire UI on the desktop, as well as on Android and embedded Linux devices. The changes you make to the UI are instantly visible to you in the preview.

In addition, you can use Qt Design Viewer to run applications in most widely-used web browsers on the desktop and in mobile devices This enables you to easily share your designs with reviewers who don't have Qt Design Studio.

Available under certain Qt licenses.
Find out more.