# EPUB Viewer

Free online EPUB viewer. Open and preview e-books (.epub) directly in your browser — no upload, no software.

> Canonical page: https://elysiatools.com/en/viewers/epub

- **Category:** Diagrams

- **Supported formats:** .epub

## Overview

This EPUB viewer renders e-books directly in your browser. EPUB (.epub) is the open standard for digital e-books, used by Apple Books, Google Play Books, Kobo and most e-reading apps. Pick a sample book or choose your own .epub file to read it instantly, with no upload.

## When to use

- You received an .epub file and want to read it without an e-reader app.
- You need a quick, private preview of an e-book.
- You want to check EPUB formatting and content.

## How it works

- Select a built-in sample book or choose your own .epub file.
- The viewer renders the e-book using epub.js in your browser — nothing is uploaded.
- Navigate chapters, adjust font size and read the content.

## Use cases

- Reading e-books without dedicated apps.
- Previewing self-published EPUB files.
- Checking EPUB formatting and structure.

## Samples

- **Sample EPUB Book**: An EPUB e-book with two chapters for in-browser preview

## Frequently asked questions

### What is an EPUB file?

EPUB (.epub) is the open standard format for digital e-books, maintained by the W3C. It is a ZIP archive containing XHTML content, CSS stylesheets, images, navigation data and metadata. EPUB is supported by Apple Books, Google Play Books, Kobo, Adobe Digital Editions and most e-reading applications.

### Are my EPUB files uploaded?

No. Books you open from your device stay on your device and are rendered locally. Only the public sample book is requested from the server.

### Can I adjust the font and layout?

The viewer provides basic reading functionality including chapter navigation and content rendering. Font and layout adjustments depend on the EPUB's embedded CSS and the viewer's capabilities.

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