Create Highly-Zoomable Images – Zoom.it
You'll remember Deep Zoom, a format which lets you explore an image easily no matter what size it is.
Zoom.it is a free service by Microsoft which enables us to view and share high-resolution imagery using the Deep Zoom.
It can be used by simply pasting the URL of the image to the form on the website or via the API provided.
The service returns a shortened URL of the zoomable image for sharing easily and embed link for inserting into web pages.