It was developed by the International Digital Publishing Forum (IDPF) as a vendor-independent format based on XML and HTML.
Readers can change font sizes, typefaces, and background colors without breaking the document's layout. 🔍 Understanding the Identifier
Text automatically adjusts to fit the screen size of any device (smartphone, tablet, or e-reader).
Large digital libraries use these alphanumeric codes to organize thousands of titles and prevent file name collisions.
EPUB is the preferred format for nearly every major digital reading platform: .EPUB Files - What They Are & How to Open .EPUB - Adobe