Gmail Featured Image Preview for Grid View

Update: Google has retired Grid View

Preview and generate the markup for Gmail's Promotions Tab Featured Image .
See it live in your own Gmail account by emailing yourself a copy (requires Grid View being enabled).

Recommended 580x400, minimum 290x200, no animations

Uploaded images are deleted every few days
Select file...
For preview only
For preview only
For preview only (requires verified Google Plus page)
Simulated Preview
Featured Image
Subject line
Place this in the body of the email:

 Move the email to the Promotions tab if needed.