: If you are using a standard @gmail.com account, you will still see the banner unless you use the iframe method mentioned above. 4. Browser-Side Hiding (For Personal Use)

The most common and effective way to hide the banner from your users is to embed your Google Apps Script (GAS) URL within another webpage using an tag.

: Use a basic iframe structure: .

: Tools like Custom JavaScript for Websites allow you to run a script that sets the banner's display to "none".

: Ensure you set HtmlService.XFrameOptionsMode.ALLOWALL in your script's doGet() function to allow it to be framed by external sites. 2. Deploy Within a Google Site

If you don't want to manage external hosting, embedding the web app directly into a can often suppress the warning for users within your organization or those viewing the site. This is because Google considers its own ecosystem a "safe" container for the script. 3. Use a Google Workspace Account

: Host a simple HTML file on a free platform like GitHub Pages or your own website.

If you only want to remove the banner for yourself or a small team, you can use browser extensions to hide the CSS element of the banner.

: This removes the banner without any extra coding or embedding.