Deploy your script as a and copy the "Current web app URL" (the URL ending in /exec ).
: For internal tools where you control the browser, you can use extensions like GAS WebApp Warning Remover (Firefox) or Custom JavaScript for Websites (Chrome) to inject CSS that sets display: none on the banner's HTML ID (usually GCP Project Association : Associating your Apps Script with a standard Google Cloud (GCP) project
Even deep scoping may still trigger the warning if Google classifies them as sensitive. Check Google’s scope classification table. Deploy your script as a and copy the
When you deploy a Google Apps Script project as a , Google shows a security/permission screen before the app runs. One of the lines often displayed is:
This is not a long-term fix. Google may flag apps that use test mode for production purposes, and you cannot exceed 100 users. When you deploy a Google Apps Script project
Click . The browser will now dynamically strip the notice from your view every time the script triggers. Architectural Comparison of Workarounds Banner Removed? Difficulty Setup Cost External Iframe Embedding Yes Client-facing products and SAAS apps Free (GitHub Pages) Google Sites Integration Yes Low-code customer forms or client portfolios Workspace Domain Restriction Yes Internal company dashboards and operational tools Requires Google Workspace plan CSS Content Blockers Yes (Local Only) Solo developers during active testing phases Technical Summary
One Tuesday, Elias snapped. He didn't just want the banner gone; he wanted the it creates friction
For end-users, this message is alarming. It suggests the app is unsafe or unverified. For developers, it creates friction, reduces adoption, and damages trust. The natural question is:
If you only need the banner gone for your own view (e.g., on a public display or TV), you can use browser extensions like "Custom JavaScript for websites" to inject CSS and hide the element. CSS to hide #warning display: none; Google Groups Why the Banner is There Security & Transparency
Modify your Apps Script code to process incoming requests and return clean JSON payloads: javascript