Trying to display/render Post Purchase Checkout Extension preview in embed app page

Shopify Apps

Topic summary

A developer is attempting to display a Post Purchase Checkout Extension preview within their custom Shopify app’s embedded admin page but cannot find documentation or clear resources on implementation.

Current Challenge:

  • No established method exists to render checkout extension previews inside embedded app pages
  • Testing and providing merchant previews is difficult without proper preview functionality

Community Response:

  • Another developer confirms experiencing the same limitation
  • Suggests Shopify should provide a development sandbox or dedicated preview mode for checkout extensions

Status: The discussion remains open with no solution identified. Participants are seeking workarounds or best practices from others who may have solved this implementation challenge.

Summarized with AI on October 29. AI used: claude-sonnet-4-5-20250929.
1

Hey folks,
I am working on adding a Post purchase checkout extension preview inside my custom app’s embedded admin page.
But I haven’t found any clear resources on how to render the preview within the app.
Anyone done this before or have suggestions?

2

I agree; I have been running into the same thing.

There isn’t any proper way to preview checkout extensions during development, which makes testing and merchant preview a bit frustrating.

It would be awesome if Shopify added some kind of dev sandbox or preview mode for this.

Has anyone figured out a better way yet?