Why Am I Seeing the Error “Stripe Checkout Is Not Able to Run in an iFrame”?

Overview

If you see the message below when trying to complete a purchase, Stripe Checkout is being blocked because it’s being launched from within an embedded page (an iframe) instead of a normal browser tab (a top-level window):

“Stripe Checkout is not able to run in an iFrame. Please redirect to Checkout at the top level.”

Stripe Checkout does not support running inside iframes. This is expected behavior enforced by Stripe for security and reliability.

What you may notice (symptoms)

• Clicking Buy / Upgrade / Checkout does nothing, or the page briefly flashes and returns.
• The issue reproduces across browsers (Chrome/Safari), including incognito/private mode.
• Clearing cookies/cache and disabling extensions does not help.
• The browser console shows: Stripe Checkout is not able to run in an iFrame. Please redirect to Checkout at the top level.

Why this happens

The most common scenario is opening the store or licensing flow through My OPSWAT Portal (MOP) (or another portal/container) that renders pages inside an iframe.

When the checkout flow is started inside an iframe, Stripe blocks it and shows the error above because Checkout must be opened via a top-level redirect.

Workaround (recommended)

Open the MD Cloud store directly in a new browser tab (outside of the portal/iframe), then start checkout again:

Direct link (MD Cloud store): Licensing | MetaDefender Cloud

Steps

1. Copy the link above.
2. Paste it into a new browser tab.
3. Re-initiate the purchase/checkout.

Expected result: Stripe Checkout opens as a full-page, top-level checkout and completes normally.