Sobre os arquivos EPUB
eBook EPUB
Padrão universal aberto de ebook (2007). Reflowable — adapta texto a qualquer tela. Suportado em Apple Books, Google Play Books, Kobo, qualquer leitor não-Kindle.
Família
eBooks
Extensão
.epub
Tipo MIME
application/epub+zip
Pode ser usado como
COMO NASCEU O
FORMATO EPUB.
EPUB — Electronic Publication — is the open ebook standard defined by the International Digital Publishing Forum (IDPF) in September 2007. It replaced the earlier Open eBook Publication Structure (OEBPS) with a ZIP container holding XHTML content, CSS styling, and a spine file describing reading order. In 2017 the IDPF merged into the W3C, which now maintains EPUB as an open web standard.
Every non-Amazon ebook reader on the planet uses EPUB: Apple Books, Google Play Books, Kobo, Nook, Adobe Digital Editions, and every library lending app (OverDrive, Libby). Publishers create books in EPUB3 (the current version) and then re-wrap them for Kindle’s AZW3 for Amazon distribution. The format is extensible, accessible, and completely patent-free.
CURIOSIDADES E
FATOS INTERESSANTES.
An EPUB file is literally a ZIP archive — rename to .zip and browse the XHTML chapters and CSS.
Every EPUB must contain a META-INF/container.xml pointing to the spine — the only fixed file in the spec.
EPUB 3 added audio, video, MathML, SVG, and JavaScript support — closer to a mini-website than a book.
Project Gutenberg distributes over 70 000 free public-domain books as EPUB.
The W3C now maintains EPUB since absorbing IDPF in 2017; the standard is evolving with Web Publications.
VANTAGENS E
LIMITAÇÕES.
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.
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.
Tamanhos típicos de arquivo
Novel (300 pages, text only)
200-800 KB
Illustrated reference book
5-30 MB
Fixed-layout children's book
30-100 MB
Especificações técnicas
- 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
CONVERTER A PARTIR DE
EPUB
CONVERTER PARA
EPUB
Casos de uso comuns
Digital books, e-reader content, self-publishing, online libraries.
Formatos relacionados
Comparativos populares
EPUB vs PDF
Diferenças, tamanho de arquivo e quando escolher cada formato.
EPUB vs DOCX
Diferenças, tamanho de arquivo e quando escolher cada formato.
EPUB vs MOBI
Diferenças, tamanho de arquivo e quando escolher cada formato.
EPUB vs TXT
Diferenças, tamanho de arquivo e quando escolher cada formato.
EPUB vs MD
Diferenças, tamanho de arquivo e quando escolher cada formato.
EPUB vs HTML
Diferenças, tamanho de arquivo e quando escolher cada formato.
Conversões populares de EPUB
Os destinos mais procurados ao converter arquivos EPUB.
Perguntas frequentes sobre EPUB
Perguntas frequentes
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 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 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.