EPUB vs XHTML
Um comparativo detalhado de EPUB eBook e XHTML Document — tamanho de arquivo, qualidade, compatibilidade e qual escolher de acordo com seu fluxo de trabalho.
EPUB eBook
eBooksEPUB is the open standard for reflowable digital books. It adapts text to any screen size and is supported by most e-readers except Kindle. EPUB 3 adds support for multimedia and interactivity.
Sobre os arquivos EPUBXHTML Document
Documents & TextXHTML is XML-compliant HTML for strict document processing.
Sobre os arquivos XHTMLComparativo de vantagens
EPUB Vantagens
- Open standard — no vendor lock-in, no DRM required.
- Reflowable text — adapts to any screen size, font size, or orientation.
- Rich typography via CSS, embedded fonts, and SVG.
- Accessibility-first: native support for screen readers, adjustable text, and alt-text.
- Universal across every non-Kindle ebook reader and library app.
XHTML Vantagens
- Rigorous XML syntax — can be parsed with any XML tool.
- Native EPUB and DocBook support.
- Enforces clean markup — no sloppy error recovery.
- Namespaces allow mixing SVG, MathML, and XHTML in one document.
Limitações
EPUB Limitações
- Kindle does not support EPUB natively (Amazon wants you to convert to AZW3).
- Fixed-layout EPUBs (for children's books, comics) are awkward to author.
- Rendering quality varies between apps — some CSS works everywhere, some does not.
- Adobe DRM (ADEPT) or Apple FairPlay are optional layers that complicate portability.
XHTML Limitações
- Browsers reject XHTML with strict MIME on any markup error — harsh failure mode.
- Authoring is more tedious than HTML5.
- Not served by ~99% of the web.
- Largely superseded by HTML5.
Especificações técnicas
| Especificação | EPUB | XHTML |
|---|---|---|
| MIME type | application/epub+zip | — |
| Extension | .epub | — |
| Container | ZIP archive | — |
| Markup | XHTML 1.1 (EPUB 2); HTML5 (EPUB 3) | — |
| Standards | IDPF/W3C EPUB 2.0.1, 3.0, 3.2, 3.3 | XHTML 1.0 (2000), XHTML 1.1 (2001) |
| MIME types | — | application/xhtml+xml, text/html |
| Extensions | — | .xhtml, .xht, .xml |
| Encoding | — | UTF-8 (required with XML prolog) |
| Used in | — | EPUB, DocBook, some government sites |
Tamanhos típicos de arquivo
EPUB
- Novel (300 pages, text only) 200-800 KB
- Illustrated reference book 5-30 MB
- Fixed-layout children's book 30-100 MB
XHTML
- EPUB chapter 5-50 KB
- DocBook reference page 10-100 KB
Pronto para converter?
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Perguntas frequentes
EPUB (Electronic Publication) is the open standard eBook format maintained by the W3C. It supports reflowable text that adapts to screen size, embedded fonts, images, and interactive content, making it the most widely supported eBook format globally.
EPUB (Electronic Publication) is the abrir padrão eBook formato maintained pelo W3C. It suporta reflowable text that adapts to screen size, embedded fonts, images, e interactive content, making it the most widely suportado eBook formato globally.
EPUB files open in Apple Books, Google Play Books, Calibre (free), Kobo eReaders, and Adobe Digital Editions. Note that Amazon Kindle does not natively support EPUB, so conversion to MOBI or AZW3 is needed.
EPUB arquivos abrir in Apple Books, Google reproduzir Books, Calibre (free), Kobo eReaders, e Adobe Digital Editions. Note that Amazon Kindle does not natively support EPUB, so conversion to MOBI ou AZW3 is needed.
Use EPUB for reading on phones and eReaders since it reflows text to fit any screen. Use PDF for documents with fixed layouts like textbooks with precise formatting, scanned pages, or documents intended for printing.
Use EPUB para reading on phones e eReaders since it reflows text to fit any screen. usar PDF para documents com fixed layouts like textbooks com precise formatoting, scanned pages, ou documents intended para printing.