Convert LaTeX to EPUB3

Why Convert LaTeX to EPUB3?

Converting LaTeX to EPUB3 is the optimal path for bringing scientific and mathematical documents into the digital reading ecosystem. Unlike the older EPUB 2 standard, EPUB3 supports MathML natively, which means your LaTeX equations can be rendered as proper mathematical markup rather than static images. This preserves the semantic meaning of equations, allows screen readers to describe them, and enables readers to select and copy mathematical expressions.

The EPUB3 specification brings the full power of web technologies to digital books. Built on HTML5 and CSS3, EPUB3 can faithfully represent the complex structures found in LaTeX documents: theorems with custom styling, numbered definitions, proof environments, and algorithmically formatted content. JavaScript support in EPUB3 even enables interactive elements like dynamic graphs, quizzes, and computational widgets that can enhance educational materials originally written in LaTeX.

Accessibility is a compelling reason to convert LaTeX to EPUB3. While LaTeX PDF output is often inaccessible to screen readers, EPUB3 includes comprehensive accessibility features through ARIA roles, alternative text, and media overlays that synchronize text with audio narration. Universities and publishers are increasingly required to provide accessible versions of academic materials, making EPUB3 conversion essential for compliance with accessibility regulations like WCAG and Section 508.

For publishers and institutions distributing scientific content, EPUB3 offers a future-proof format aligned with W3C web standards. As e-reader technology improves, MathML rendering will become more consistent, and EPUB3 documents will benefit from these improvements without re-conversion. The format supports metadata standards (Dublin Core, ONIX) required by distribution platforms, making LaTeX-to-EPUB3 conversion a practical step toward professional digital publishing.

Key Benefits of Converting LaTeX to EPUB3:

• Native MathML: Equations rendered as semantic markup, not images
• HTML5 Foundation: Modern web technologies for rich content display
• Accessibility: ARIA roles, screen reader support, and media overlays
• Interactivity: JavaScript-enabled widgets and dynamic content
• Multimedia: Embed audio, video, and interactive diagrams
• CSS3 Styling: Advanced typography and layout control
• Future-Proof: Built on W3C standards with growing reader support

Practical Examples

Example 1: Mathematics Textbook with MathML

Input LaTeX file (calculus.tex):

\documentclass{book}
\usepackage{amsmath,amsthm}
\newtheorem{theorem}{Theorem}
\begin{document}
\chapter{Integration}
\begin{theorem}[Fundamental Theorem of Calculus]
If $f$ is continuous on $[a,b]$, then
\[ \int_a^b f(x)\,dx = F(b) - F(a) \]
where $F'(x) = f(x)$.
\end{theorem}
\begin{proof}
Consider the function $G(x) = \int_a^x f(t)\,dt$...
\end{proof}
\end{document}

Output EPUB3 file (calculus.epub):

EPUB3 with native MathML:
- Integral equation in semantic MathML
- Theorem styled with CSS3 borders
- Proof environment with end-of-proof marker
- Screen readers can describe equations
- Selectable and copyable math expressions
- Reflowable layout for any screen size
- Compatible with Apple Books, Thorium

Example 2: Physics Lab Manual with Figures

Input LaTeX file (lab_manual.tex):

\documentclass{report}
\usepackage{graphicx,siunitx}
\begin{document}
\chapter{Experiment 5: Ohm's Law}
\section{Objective}
Verify that $V = IR$ for resistive circuits.
\section{Equipment}
\begin{itemize}
  \item DC power supply (\SIrange{0}{30}{\volt})
  \item Digital multimeter
  \item Resistors: \SI{100}{\ohm}, \SI{220}{\ohm}
\end{itemize}
\begin{figure}[h]
  \includegraphics[width=0.6\textwidth]{circuit.png}
  \caption{Series circuit diagram}
\end{figure}
\end{document}

Output EPUB3 file (lab_manual.epub):

Interactive lab manual:
- SI units properly formatted via MathML
- Circuit diagram embedded as SVG/PNG
- Figure caption with numbering preserved
- Equipment lists with proper symbols
- Responsive images scale to screen
- Students access on tablets in lab
- Accessible with alt text for figures

Example 3: Open Access Journal Article

Input LaTeX file (article.tex):

\documentclass{article}
\usepackage{hyperref,natbib}
\title{Topological Insulators: A Review}
\author{J. Park \and L. Wang}
\begin{document}
\maketitle
\begin{abstract}
We review recent advances in topological insulator
materials, focusing on the quantum spin Hall effect...
\end{abstract}
\section{Introduction}
Since the prediction by Kane and Mele \citep{kane2005},
topological insulators have attracted intense research...
\bibliographystyle{plainnat}
\bibliography{topo_refs}
\end{document}

Output EPUB3 file (article.epub):

Accessible open-access article:
- Dublin Core metadata for discovery
- Linked citations to bibliography
- Abstract with semantic markup
- MathML for all equations
- Hyperlinks preserved from hyperref
- W3C compliant accessibility
- Ready for DOAB/OAPEN distribution

Frequently Asked Questions (FAQ)

Q: What is the difference between EPUB and EPUB3?

A: EPUB 2 (2007) uses XHTML 1.1 and basic CSS, while EPUB3 (2011+) uses HTML5, CSS3, MathML, SVG, and supports JavaScript. For LaTeX conversion, EPUB3 is significantly better because it can represent mathematical equations natively through MathML rather than converting them to images. EPUB3 also provides better accessibility, multimedia support, and richer formatting options.

Q: Which e-readers support EPUB3 and MathML?

A: Apple Books (iOS/macOS) has excellent EPUB3 and MathML support. Thorium Reader (desktop) provides strong EPUB3 compliance. Kobo e-readers support most EPUB3 features. Google Play Books handles basic EPUB3. However, MathML rendering varies: Apple Books and Thorium are the most reliable for math-heavy content. For maximum compatibility, equations can be provided as both MathML and fallback SVG images.

Q: How are LaTeX theorem environments handled in EPUB3?

A: Theorem, lemma, definition, and proof environments are converted to semantically marked HTML5 sections with appropriate CSS styling. Theorem numbering is preserved, and the visual distinction (borders, background colors, italic text) is replicated through CSS3 stylesheets embedded in the EPUB3. The semantic markup also allows screen readers to identify these academic structures.

Q: Can EPUB3 handle LaTeX bibliography citations?

A: Yes, BibTeX and BibLaTeX bibliographies are converted to a references section in the EPUB3. In-text citations become hyperlinks to the corresponding bibliography entries. The bibliography formatting style (numbered, author-year, etc.) is preserved. Readers can tap citations to jump to references and tap back to return to their reading position, providing a natural navigation experience.

Q: Is EPUB3 accessible for visually impaired readers?

A: EPUB3 is designed with accessibility as a core feature. It supports ARIA roles for semantic structure, alternative text for images, MathML that screen readers can vocalize, and media overlays for synchronized text-audio narration. Converting LaTeX to EPUB3 is one of the best ways to make academic content accessible, as PDF files generated from LaTeX are often difficult for screen readers to interpret correctly.

Q: What LaTeX packages work best with EPUB3 conversion?

A: Standard packages convert reliably: amsmath, amssymb, graphicx, hyperref, natbib/biblatex, enumitem, and booktabs. The hyperref package is particularly useful as its links carry over to EPUB3. Avoid packages that rely on TeX-specific positioning (TikZ diagrams should be pre-rendered to SVG). Keep document structure simple with standard sectioning commands for the best EPUB3 output.

Q: Can I add interactivity to the EPUB3 output?

A: EPUB3 supports JavaScript for interactivity, though reader support varies. Interactive elements like expandable proofs, self-check quizzes, or dynamic graphs can be added post-conversion using tools like Sigil. However, the base conversion from LaTeX produces static content. For educational materials, consider adding interactive elements as a separate enhancement step after the initial conversion.

Q: How does EPUB3 handle LaTeX document structure?

A: LaTeX document structure maps naturally to EPUB3. Chapters become separate XHTML files within the EPUB, sections become HTML headings, the table of contents becomes the EPUB navigation document, and the bibliography becomes a linked reference section. Front matter (abstract, preface) and back matter (appendices, index) are tagged with appropriate EPUB3 semantic roles for proper reading system behavior.