ebook Format
EPUB File Format
Electronic Publication is the global open standard format for digital books. Built upon HTML, CSS, and XML, EPUB reflows text dynamically to fit any display size.
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Technical Specifications
| Extensions | .epub |
| MIME Types | application/epub+zip |
| Category | eBook |
| Engine Tier | tier2-wasm |
| Magic Bytes / Sniffing | 0x50 0x4B 0x03 0x04 |
| Opens With | Apple Books, Kobo, Kindle (via Send-to-Kindle), Calibre |
| Good For | Digital book reading on phones, tablets, and e-ink readers. |
| Not Recommended For | Fixed-layout technical manuals requiring rigid page geometry. |