First, it’s crucial to understand what this message actually is. The exact text you're likely seeing is:

Google will show the warning to non-test users, but test users see a normal prompt.

or a custom CSS injector to set the warning element's display to CSS Selector #warning display: none !important; GitHub Pages site to host the iframe for your application? AI responses may include mistakes. Learn more

Choose the tab and paste your Apps Script Web App execution URL. Scale the container box to fill the screen layout.

The banner "This application was created by a Google Apps Script user" is a designed by Google to warn users that the application has not been verified by Google and may be untrustworthy . Direct Solutions

This comprehensive guide will explain why this message appears, provide solutions to mitigate it, and offer workarounds to hide it entirely. Why Does This Warning Message Appear?

However, depending on your technical skills and how you intend to share the app, there are three primary workarounds. Method 1: Embedding the Web App in an Iframe