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).
sample-100kb.epub
92.1 KB
10 pages
File details and verification
- Filename
- sample-100kb.epub
- Exact size
- 94,306 bytes
- Displayed size
- 92.1 KB
- Catalog status
- Valid catalog fixture
- SHA-256
- c57480536d32218511e846562913b6c408afdc2ff50dd0da9e278c60a95b4b7c
- Header signature
- Matched (ZIP container)
- Verified on
- 2026-08-10
- MIME type
- application/octet-stream
- Pages
- 10
- Chapters
- 3
- Language
- en
- License
- CC0 / Public Domain
- Download URL
- https://cdn.truefilesize.com/epub/sample-100kb.epub
See how TrueFileSize generates and measures sample files, or review the editorial policy.
sample-500kb.epub
477 KB
50 pages
File details and verification
- Filename
- sample-500kb.epub
- Exact size
- 488,506 bytes
- Displayed size
- 477 KB
- Catalog status
- Valid catalog fixture
- SHA-256
- 13c01c24cf2959563986b749738da0435a6110f9302decb6f725048b26eaabff
- Header signature
- Matched (ZIP container)
- Verified on
- 2026-08-10
- MIME type
- application/octet-stream
- Pages
- 50
- Chapters
- 10
- Language
- en
- License
- CC0 / Public Domain
- Download URL
- https://cdn.truefilesize.com/epub/sample-500kb.epub
See how TrueFileSize generates and measures sample files, or review the editorial policy.
sample-1mb.epub
991 KB
100 pages
File details and verification
- Filename
- sample-1mb.epub
- Exact size
- 1,015,063 bytes
- Displayed size
- 991 KB
- Catalog status
- Valid catalog fixture
- SHA-256
- 9e5ef403eeba2f1eac6ef5959dd1bf858cfc72d098a22687fcdd78a032015a83
- Header signature
- Matched (ZIP container)
- Verified on
- 2026-08-10
- MIME type
- application/octet-stream
- Pages
- 100
- Chapters
- 15
- Language
- en
- License
- CC0 / Public Domain
- Download URL
- https://cdn.truefilesize.com/epub/sample-1mb.epub
See how TrueFileSize generates and measures sample files, or review the editorial policy.
sample-5mb.epub
4.96 MB
300 pages
File details and verification
- Filename
- sample-5mb.epub
- Exact size
- 5,202,648 bytes
- Displayed size
- 4.96 MB
- Catalog status
- Valid catalog fixture
- SHA-256
- 01ac151dd78cfeaa0af8c90fdd81a88ce5576c436de4839c1304f228a42c478b
- Header signature
- Matched (ZIP container)
- Verified on
- 2026-08-10
- MIME type
- application/octet-stream
- Pages
- 300
- Chapters
- 25
- Language
- en
- License
- CC0 / Public Domain
- Download URL
- https://cdn.truefilesize.com/epub/sample-5mb.epub
See how TrueFileSize generates and measures sample files, or review the editorial policy.
sample-10mb.epub
9.95 MB
500 pages
File details and verification
- Filename
- sample-10mb.epub
- Exact size
- 10,429,736 bytes
- Displayed size
- 9.95 MB
- Catalog status
- Valid catalog fixture
- SHA-256
- bf0ed9839da790ea937baaebec3812f9d8bb2f9a2fed10f7bb653b9ae17ed037
- Header signature
- Matched (ZIP container)
- Verified on
- 2026-08-10
- MIME type
- application/octet-stream
- Pages
- 500
- Chapters
- 40
- Language
- en
- License
- CC0 / Public Domain
- Download URL
- https://cdn.truefilesize.com/epub/sample-10mb.epub
See how TrueFileSize generates and measures sample files, or review the editorial policy.
sample-text-only.epub
36.3 KB
20 pages
File details and verification
- Filename
- sample-text-only.epub
- Exact size
- 37,221 bytes
- Displayed size
- 36.3 KB
- Catalog status
- Valid catalog fixture
- SHA-256
- d5c3161f4d500e5ef0e020ec8433d6d80b4380d35bc730934c88c6f4c2ebcc83
- Header signature
- Matched (ZIP container)
- Verified on
- 2026-08-10
- MIME type
- application/octet-stream
- Pages
- 20
- Chapters
- 5
- Language
- en
- License
- CC0 / Public Domain
- Download URL
- https://cdn.truefilesize.com/epub/sample-text-only.epub
See how TrueFileSize generates and measures sample files, or review the editorial policy.
sample-with-toc.epub
181 KB
30 pages
File details and verification
- Filename
- sample-with-toc.epub
- Exact size
- 185,333 bytes
- Displayed size
- 181 KB
- Catalog status
- Valid catalog fixture
- SHA-256
- 6dbf1d4e5719a7e5569de3aa38be979d6d097d5aa1103df1caed24ecb0cbdaa6
- Header signature
- Matched (ZIP container)
- Verified on
- 2026-08-10
- MIME type
- application/octet-stream
- Pages
- 30
- Chapters
- 8
- Language
- en
- License
- CC0 / Public Domain
- Download URL
- https://cdn.truefilesize.com/epub/sample-with-toc.epub
See how TrueFileSize generates and measures sample files, or review the editorial policy.
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
What is EPUB format?
EPUB (Electronic Publication) is an open ebook format maintained by the W3C. It's a ZIP archive containing XHTML content, CSS styling, images, and an OPF manifest that describes the reading order. EPUB supports reflowable text — readers can adjust font size, margins, and line spacing. The current version is EPUB 3.3 with HTML5/CSS3 support.
EPUB vs PDF for ebooks — Which is better?
EPUB is better for reading on screens — it has reflowable text that adapts to any screen size, adjustable font size, and night mode support. PDF is better for print layouts, forms, and documents with complex formatting that must look identical everywhere. Use EPUB for novels, textbooks, and text-heavy content. Use PDF for manuals, reports, and print-ready documents.
How to open EPUB on Kindle?
Since late 2022, Kindle supports EPUB directly via Send to Kindle (sendtokindle.com or the Kindle app). Email your EPUB file or drag-and-drop it in the Send to Kindle desktop app. Older Kindles required conversion to MOBI/AZW first using Calibre: ebook-convert book.epub book.mobi. For best results, validate your EPUB with epubcheck before sending.
Best EPUB reader — What apps can open EPUB files?
Desktop: Calibre (free, cross-platform), Apple Books (macOS), Kindle app. Mobile: Apple Books (iOS), Google Play Books (Android/iOS), Kobo app, Kindle app. Linux: Foliate, Calibre. Browser: Readium, EPUB.js. For developers testing EPUB rendering, Calibre and Thorium Reader provide the most standards-compliant rendering.
How do I convert PDF to EPUB?
Calibre: ebook-convert input.pdf output.epub. Pandoc: pandoc input.pdf -o output.epub. Online: CloudConvert, Zamzar. Note: PDF-to-EPUB quality varies — PDFs with complex layouts, tables, or scanned images often produce poor results because PDF is fixed-layout while EPUB is reflowable. Start from source (DOCX/Markdown) when possible.
What is the difference between EPUB 2 and EPUB 3?
EPUB 3 adds HTML5/CSS3 support, embedded audio/video, JavaScript interactivity, SMIL media overlays (read-aloud), MathML, and improved accessibility (WCAG). EPUB 2 uses XHTML 1.1 and CSS 2.1. Most modern readers support EPUB 3, but EPUB 2 has broader legacy compatibility. Our EPUB example files use EPUB 3 structure.
Other document formats
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