The manuscript was digitized by the National Library of Sweden. You can view the high-resolution scans of every page (including the famous Devil illustration) for free.
The origin story of the Codex Gigas is as fascinating as the book itself. According to medieval legend:
: High-quality digital images of every page are hosted by the Library of Congress .
It is written on vellum made from the skins of an estimated 160 donkeys or calves. The Dark Legend of the Devil's Bible
Available in academic English translations online. 3. Academic Commentaries and Guides