EPUB

EPUB is the open standard for e-books, defined by the IDPF (now merged into the W3C). An EPUB file is a ZIP archive containing HTML5 content files, CSS stylesheets, images, and a metadata manifest. Its reflowable layout adapts text to the reader's screen size and font preferences, distinguishing it from fixed-layout formats like PDF. EPUB 3, released in 2011, added support for audio, video, and JavaScript interactivity.

File extensions	.epub
MIME type	application/epub+zip
Developer	International Digital Publishing Forum (IDPF) / W3C
First released	2007
Category	E-books
Open standard	Yes

What opens EPUB files

• Apple Books
• Kobo e-readers
• Adobe Digital Editions
• Calibre
• Google Play Books

Browse File Formats

Reference details for 53 file formats — extensions, MIME types, what opens each one, and how they convert.

7Z Archives ABW Documents AI Images AVIF Images AZW3 E-books BMP Images CSS Other CSV Spreadsheets DjVu E-books DOC Documents DOCX Documents EPS Images EPUB E-books FB2 E-books GIF Images GZ Archives HEIC Images HTML Documents ICO Images ISO Archives JPG Images JSON Other Keynote Presentations Markdown Documents MOBI E-books Numbers Spreadsheets ODP Presentations ODS Spreadsheets ODT Documents OTF Other Pages Documents PDF Documents PNG Images PPT Presentations PPTX Presentations PSD Images RAR Archives RAW Images RTF Documents SVG Images TAR Archives TeX / LaTeX Documents TIFF Images TSV Spreadsheets TTF Other TXT Documents WebP Images WOFF / WOFF2 Other WPD Documents XLS Spreadsheets XLSX Spreadsheets XML Documents ZIP Archives