Remove This Application Was Created By A Google Apps Script User -

Click directly on the light blue banner container to target its structural CSS class.

to migrate a project away from Apps Script, or should we refine the narrative arc of the story?

What (like submitting forms or reading sheets) does your script perform? Click directly on the light blue banner container

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

Once verified and published as an add-on, your code executes natively inside Gmail, Calendar, or Drive sidebars, bypassing web app layout banners entirely. Summary of Deployment Options Banner Status Best Used For Requirements Visible ⚠️ Rapid debugging or developer testing Free Google Account HTML IFrame Embedding Hidden 🟢 Public MVPs, contact forms, client tools External host (e.g., GitHub Pages) Workspace Domain Lock Hidden 🟢 Internal enterprise tools & dashboards Google Workspace account Marketplace Add-on Hidden 🟢 Commercial SaaS distribution GCP Verification Process Local Workaround for Developers: Browser Extensions Ensure you are using the /exec URL and

If you have ever built a web app using Google Apps Script (GAS), you have likely encountered the persistent gray banner at the top of the page that reads:

Use code with caution.

Google Apps Script is designed for quick internal tools. For client-facing applications, developers often migrate their logic to or Firebase Hosting .

Using a service like or a simple Node.js/Express server, you can fetch the HTML content from your Google Apps Script, strip out the Google-injected header tags, and serve the cleaned HTML on your own custom domain. Pros: Complete removal of the banner; professional URL. Google Apps Script is designed for quick internal tools

The short answer is . The banner is injected by Google's infrastructure outside your script's control. Even with Google Workspace (formerly G Suite) paid accounts, there's no official setting to disable this warning banner entirely. According to Google's Issue Tracker, this is a known behavior that Google hasn't provided a solution for.

The short answer is that the "This application was created by a Google Apps Script user" banner from a native Google Apps Script web app [1, 2]. Google deliberately hardcodes this warning banner at the top of the screen as a mandatory security feature to prevent phishing and protect users [1, 2].