Hi all 
I’m Conor, and I’m the Product Manager for HubSpot’s Email Editor.
I’m happy to announce that the ability to export email designs to PDF and HTML is now available in Public Beta. You can also opt-in to the Public BETA by navigating to our product update from the product updates page via Settings → Product Updates.
Looking forward to any and all feedback on this new feature which you can submit via the “Give Feedback” button next to the product update once enabled in your account.