.EPUB File Extension
File TypeOpen eBook File
| Developer | IDPF |
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| Category | eBook Files |
| Format | Zip
ZipThis file is saved in a zipped format. You can view the contents by unzipping it with a file decompression program. |
What is an EPUB file?
An EPUB file is a digital ebook saved in the EPUB format, an open XML-based format for digital books and publications. It provides a standard digital publication format for publishers and consumers. EPUB files can be viewed with supporting software programs and hardware devices, such as the Sony Reader and Barnes & Noble Nook.
EPUB file open in Calibre 3.7
The EPUB format is based on three open standards, which are all maintained by the International Digital Publishing Forum (IDPF).
- The Open Publication Structure (OPS), which defines the content markup
- The Open Packaging Format (OPF), which describes the ebook structure
- The Open Container Format (OCF), which packages all the ebook files together in a compressed format
NOTE: Many commercial ebooks include digital rights management (DRM) protection. These files can only be opened on devices that have been authorized to view the ebook.
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