Sample EPUB File Download — Free Ebook Test Files
Download free ebook sample files in EPUB format — text-only, with images, and multi-chapter variants from 100KB to 10MB. Use these EPUB test files for ebook reader testing, reading app development, and format conversion testing (EPUB to PDF, EPUB to MOBI). EPUB is the most widely used ebook format — supported by Apple Books, Google Play Books, Kobo, and Kindle (since 2022).
Use cases for sample EPUB files
- Testing EPUB rendering in ebook reader applications
- Verifying EPUB upload validation in publishing platforms
- Testing EPUB-to-PDF and EPUB-to-MOBI conversion tools
- Benchmarking EPUB parsing and metadata extraction
- Testing table of contents (TOC) navigation
- Validating EPUB 3 compliance with epubcheck
EPUB vs PDF vs MOBI — Ebook format comparison
| Feature | EPUB | MOBI/AZW | |
|---|---|---|---|
| Reflowable text | Yes | No (fixed layout) | Yes |
| Font size adjustment | Yes | Zoom only | Yes |
| Kindle support | Yes (since 2022) | Limited | Native |
| Apple Books | Native | Yes | No |
| Open standard | Yes (W3C) | Yes (ISO) | No (Amazon) |
| Best for | Novels, ebooks, text-heavy | Forms, manuals, print | Kindle only |
EPUB file structure
book.epub (ZIP archive)
├── mimetype # "application/epub+zip" (uncompressed)
├── META-INF/
│ └── container.xml # Points to content.opf
└── OEBPS/
├── content.opf # Manifest + reading order (spine)
├── toc.ncx # Table of contents (EPUB 2)
├── toc.xhtml # Navigation document (EPUB 3)
├── chapter-1.xhtml # Chapter content (XHTML)
├── chapter-2.xhtml
├── styles.css # Optional stylesheets
└── images/ # Optional embedded imagesAn EPUB is a renamed ZIP file. You can rename .epub to .zip and extract it to inspect the XHTML content, CSS styles, and OPF manifest.
How to create and validate EPUB files
# Convert Markdown to EPUB (Pandoc)
pandoc input.md -o output.epub --metadata title="My Book"
# Convert DOCX to EPUB
pandoc input.docx -o output.epub
# Validate EPUB structure (W3C epubcheck)
java -jar epubcheck.jar book.epub
# Convert EPUB to MOBI (for Kindle)
ebook-convert book.epub book.mobi # Calibre CLI
# Node.js: create EPUB programmatically
# npm install epub-gen-memory
import { createEpub } from 'epub-gen-memory';Technical specifications
| Full name | Electronic Publication |
| Extension | .epub |
| MIME type | application/epub+zip |
| Based on | ZIP + XHTML + CSS + OPF manifest |
| Current version | EPUB 3.3 (W3C Recommendation) |
| Maintained by | W3C (formerly IDPF) |
| DRM | Optional (Adobe ADEPT, Apple FairPlay) |
Frequently Asked Questions
Other document formats
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