  Graphical User Interface (GUI) provides visual bridges between software apps
and end users. However, due to the compatibility of software or hardware, UI
display issues such as text overlap, blurred screen, image missing always occur
during GUI rendering on different devices. Because these UI display issues can
be found directly by human eyes, in this paper, we implement an online UI
display issue detection tool OwlEyes-Online, which provides a simple and
easy-to-use platform for users to realize the automatic detection and
localization of UI display issues. The OwlEyes-Online can automatically run the
app and get its screenshots and XML files, and then detect the existence of
issues by analyzing the screenshots. In addition, OwlEyes-Online can also find
the detailed area of the issue in the given screenshots to further remind
developers. Finally, OwlEyes-Online will automatically generate test reports
with UI display issues detected in app screenshots and send them to users. The
OwlEyes-Online was evaluated and proved to be able to accurately detect UI
display issues. Tool Link: http://www.owleyes.online:7476 Github Link:
https://github.com/franklinbill/owleyes Demo Video Link:
https://youtu.be/002nHZBxtCY
