00ebook

EPUB

Electronic Publication

EPUB is a ZIP of XHTML and CSS — a small website in a box. Text reflows to fit any screen and font size, which is exactly what a fixed-layout PDF cannot do. Every reader except Kindle takes it directly.

Extension: .epub
MIME type: application/epub+zip

01 Convert EPUB to something else

EPUB to PDF Follows the spine, so chapters come out in reading order.

02 Convert something else to EPUB

MOBI to EPUB The same reflowable text, in the format everything else reads.
AZW3 to EPUB Amazon’s newer format, in the one everything else takes.
PDF to EPUB Text that reflows to your screen instead of pretending to be paper.

03 Related formats

MOBI
AZW3
CBZ
CBR

Opening a .epub file

If you landed here because something handed you a .epub file and nothing on your machine will open it, converting it to a format you already have a reader for is usually faster than installing new software. Every conversion above runs in this browser — the file is not uploaded, so it works on a locked-down work machine and on a file you are not allowed to send anywhere.