电子书格式指南

EPUB (Electronic Publication) is an open standard developed by the International Digital Publishing Forum (IDPF) and the most widely supported ebook format. Built on ZIP, HTML, and CSS, it supports reflowable layout and responsive typography.

PDF (Portable Document Format), developed by Adobe, is a fixed-layout document format that keeps its appearance identical on every device. It is the default choice for academic papers and business documents.

MOBI (Mobipocket) was one of the earliest ebook formats supported by Kindle. Although largely superseded by AZW3, it remains the standard format for many older Kindle devices.

AZW3 (Kindle Format 8) is Amazon’s premium ebook format for Kindle devices, released in 2011. It delivers better layout and font rendering and is the mainstream format within the Kindle ecosystem.

TXT is the simplest, most basic plain-text format. It carries no formatting and stores only raw characters, making it the most universal of all formats.

DOCX is the default file format used by Microsoft Word 2007 and later. An XML-based open format, it is widely used for office documents and ebook authoring.

RTF (Rich Text Format), introduced by Microsoft in 1987, is a cross-platform rich-text format. It supports basic formatting such as bold, italic, and underline while staying broadly compatible.

JPG (JPEG) is a widely used lossy image-compression format. In ebooks it is often used to turn book pages into images, suited to cases where text search is not needed.

PNG (Portable Network Graphics) is a lossless image format with transparent-background and 24-bit color support. In ebooks it is commonly used for high-quality image preservation.

HTML is the foundational markup language of the web. As an ebook format it opens directly in a browser and suits content that needs to keep web structure and styling.

FB2 (FictionBook) is an XML-based ebook format designed for the Russian-language market. Popular across Russia and the former Soviet states, it is especially suited to novels and literary works.

LIT is an ebook format developed by Microsoft for Windows Mobile and Pocket PC. An important early format for mobile reading, it has since been replaced by more modern standards.

CBR (Comic Book RAR) is an ebook format for comics and images — essentially a renamed RAR archive. It stores comic pages as images and is a favorite among comic readers.

DJVU is an image-compression format optimized for scanned documents, developed by AT&T. Its compression far exceeds PDF’s, making it ideal for documents with many scanned pages.

DOC is the default file format of Microsoft Word 97-2003. Although superseded by DOCX, it remains widely used in many legacy systems.

Word documents (DOCX) are today’s most common office format, used by the Microsoft Office suite. They are the standard starting point for ebook authoring and collaboration.

Plain text (Text/TXT) is the most basic document format, carrying no formatting. It is the foundational format for all text processing.