Turn a MOBI ebook into an EPUB for any e-reader - here in this tab, with nothing uploaded.
A book bought years ago in an old Kindle format is still yours. It is converted here, in your browser, and never uploaded.
The text and its formatting, images, the table of contents, the title, the author and the cover.
Only if they have no DRM. Copy-protected books are encrypted, and removing that is not something this site does. Books from Project Gutenberg, Standard Ebooks, Humble Bundle and most indie stores are DRM-free.