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

100 KB

10 pages

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Verified file details

Filename: sample-100kb.epub
Exact size: 102,400 bytes
Displayed size: 100 KB
MIME type: application/octet-stream
Pages: 10
Chapters: 3
Language: en
License: CC0 / Public Domain
Download URL: https://truefilesize.com/files/epub/sample-100kb.epub

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sample-500kb.epub

500 KB

50 pages

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Verified file details

Filename: sample-500kb.epub
Exact size: 512,000 bytes
Displayed size: 500 KB
MIME type: application/octet-stream
Pages: 50
Chapters: 10
Language: en
License: CC0 / Public Domain
Download URL: https://truefilesize.com/files/epub/sample-500kb.epub

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sample-1mb.epub

1 MB

100 pages

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Verified file details

Filename: sample-1mb.epub
Exact size: 1,048,576 bytes
Displayed size: 1 MB
MIME type: application/octet-stream
Pages: 100
Chapters: 15
Language: en
License: CC0 / Public Domain
Download URL: https://truefilesize.com/files/epub/sample-1mb.epub

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sample-5mb.epub

5 MB

300 pages

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Verified file details

Filename: sample-5mb.epub
Exact size: 5,242,880 bytes
Displayed size: 5 MB
MIME type: application/octet-stream
Pages: 300
Chapters: 25
Language: en
License: CC0 / Public Domain
Download URL: https://truefilesize.com/files/epub/sample-5mb.epub

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sample-10mb.epub

10 MB

500 pages

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Verified file details

Filename: sample-10mb.epub
Exact size: 10,485,760 bytes
Displayed size: 10 MB
MIME type: application/octet-stream
Pages: 500
Chapters: 40
Language: en
License: CC0 / Public Domain
Download URL: https://truefilesize.com/files/epub/sample-10mb.epub

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sample-text-only.epub

50 KB

20 pages

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Verified file details

Filename: sample-text-only.epub
Exact size: 51,200 bytes
Displayed size: 50 KB
MIME type: application/octet-stream
Pages: 20
Chapters: 5
Language: en
License: CC0 / Public Domain
Download URL: https://truefilesize.com/files/epub/sample-text-only.epub

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sample-with-toc.epub

200 KB

30 pages

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Verified file details

Filename: sample-with-toc.epub
Exact size: 204,800 bytes
Displayed size: 200 KB
MIME type: application/octet-stream
Pages: 30
Chapters: 8
Language: en
License: CC0 / Public Domain
Download URL: https://truefilesize.com/files/epub/sample-with-toc.epub

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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	PDF	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 images

An 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.

Sample EPUB File Download — Free Ebook Test Files

Use cases for sample EPUB files

EPUB vs PDF vs MOBI — Ebook format comparison

EPUB file structure

How to create and validate EPUB files

Technical specifications

Frequently Asked Questions

Other document formats

Related reading

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