If you have ever built a custom tool, automation, or add-on using Google Apps Script and shared it with colleagues or clients, you have likely encountered a frustrating pop-up message.

: If the application isn't one you've developed and you're seeing this notice, it might be related to an organizational setting or a specific app configuration. Reach out to the app's developer or your Google Workspace administrator for assistance.

The banner acts as a safety warning for unverified developers. To lift it, you must identify your "app."

while (files.hasNext()) var file = files.next(); // Check if it is the correct file before deleting // Note: .setTrashed(true) moves it to the Trash bin file.setTrashed(true); // Logger.log('Moved to trash: ' + file.getId());

Open or create the web page where you want the tool positioned. From the right-hand utility panel, select .

This is not a long-term fix. Google may flag apps that use test mode for production purposes, and you cannot exceed 100 users.

Create a dedicated cloud project within the Google Cloud Console.

Paste your published production web app link inside the field.

When users visit your custom site, the banner disappears entirely. Method 2: Embed Within Google Sites

The most common way to hide the banner without spending money is to embed your Apps Script web app into another website using an How it works:

Ensure you are using the /exec URL and not the /dev URL, as the development mode always shows debugging headers.

Navigate directly to your Google Apps Script web app URL ( /exec ).