EPUB Viewer - Inspect Ebook Metadata & Structure

View EPUB metadata, table of contents, cover image, and file structure. Extract title, author, ISBN, word count. Private, no uploads to servers.

Drag & drop EPUB file here, or

Supports EPUB 2 and EPUB 3 formats

Security: Only process files from sources you trust. All processing happens locally in your browser.

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Frequently Asked Questions

EPUB (Electronic Publication) is an open standard ebook format based on HTML and XML. It's essentially a ZIP archive containing XHTML content, CSS stylesheets, images, and metadata in a structured format.

You can extract title, author(s), publisher, publication date, language, ISBN, subject/genre, description, rights information, and unique identifier. All metadata is stored in the OPF (Open Packaging Format) file.

Yes. The tool extracts and displays the cover image if present. Covers are typically referenced in the OPF metadata or stored as a special manifest item.

The tool parses all XHTML content files, strips HTML tags, counts words in the text. This gives an approximate word count similar to what readers display.

This tool only supports EPUB format (.epub files). Kindle uses MOBI/AZW formats and Kobo uses KEPUB, which have different structures. You would need to convert them to EPUB first.

No. All processing happens entirely in your browser using JavaScript. The EPUB is read locally and never sent anywhere. Your files remain completely private.

The OPF (Open Packaging Format) file is the heart of an EPUB. It contains metadata, the reading order (spine), and a manifest of all files. It's an XML file typically named content.opf or package.opf.

Yes. The tool parses either the NCX file (EPUB 2) or nav.xhtml (EPUB 3) to display the complete table of contents with chapter titles and hierarchy.

EPUB 2 uses NCX for navigation and has simpler metadata. EPUB 3 uses HTML5 nav elements, supports more media types, better accessibility, and enhanced metadata including multiple authors and refined roles.

The tool displays the file structure and you can see all files (HTML, images, CSS, fonts). While the current version focuses on viewing, the underlying JSZip library supports file extraction for future enhancements.

EPUB Viewer - Inspect Ebook Metadata & Structure

Book Information

Statistics

Table of Contents

File Structure

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