Freeware
Calibre and its plug-ins from the
DRM Tools Archive can be used to remove DRM protection from from Adobe Digital Editions ePub files with no quality loss. DRM removal plug-ins for Calibre remove the epub files drm header, no change on the files. After removing DRM from ePub files, you can use DRM-free ebooks on any reader you have including
Kindle,
iPod,
iPhone,
iPad,
Sony Reader,
Kobo Reader, Android,
Nook etc.
p.s. Note that chinese spammers promote commercial tools for removing DRM protection. These software sellers have illegally used the code of open source programs. Don't buy free software, do not sponsor scammers. Better donate to real developers.