No. Unzipping and XML parsing happen entirely in your browser. Safe for unreleased / internal EPUBs.

Which EPUB versions are supported?

EPUB 2.0 / 3.0 / 3.1 are supported. The version is read from in the OPF. Cover detection tries both the EPUB2 convention ( ) and the EPUB3 convention ( ).

Can it read DRM'd EPUBs (Adobe ADEPT / Apple FairPlay)?

This tool only parses the central directory, container.xml, and OPF, so DRM-encrypted bodies can't be decrypted. Bibliographic data (title, author, etc.) is usually still readable as long as the OPF itself isn't encrypted. If the OPF is encrypted, you'll see an "OPF not found" error.

What if the cover image is missing or wrong?

When the EPUB's cover metadata is incomplete, the viewer falls back to the first image file in the manifest (with a jpeg/png/gif/webp media-type). If none is found, the cover section is hidden. Older books sometimes ship without a properly registered cover.

Can I read the actual chapter contents?

No — this tool focuses on metadata. To read the book, use a dedicated reader (Apple Books / Calibre / Thorium). This tool is for quickly answering "what is this EPUB?".

Back to Developer

EPUB Metadata Viewer

Drop an EPUB file (.epub) to inspect its cover image and bibliographic data. Pulls dc:title / dc:creator (with role) / dc:language / dc:publisher / dc:identifier (ISBN etc.) / dc:date / dc:modified / dc:description / dc:subject (tags) / dc:rights from the OPF package, along with the reading order (spine), the manifest file list (id / href / media-type / properties), the EPUB version (2.0 / 3.0 / 3.1), and the container.xml rootfile pointer. EPUB is a ZIP container, so fflate unpacks it entirely in your browser — nothing is uploaded.

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How to use

Drop an EPUB file (.epub) and fflate unpacks it inside your browser, then locates the OPF package via META-INF/container.xml and parses it with fast-xml-parser. The viewer shows title, author (with role), contributors, language, publisher, publication and modification dates, description, subjects (tags), rights, every dc:identifier including ISBN, the EPUB version (2.0 / 3.0 / 3.1), OPF path, the manifest (all included files with id / href / media-type / properties), and the spine (reading order with idref / linear flag). The cover image is auto-detected (EPUB2's <meta name="cover"> or EPUB3's properties="cover-image") and rendered inline. Read-only — nothing is written or uploaded.

FAQ

Is my EPUB uploaded?: No. Unzipping and XML parsing happen entirely in your browser. Safe for unreleased / internal EPUBs.
Which EPUB versions are supported?: EPUB 2.0 / 3.0 / 3.1 are supported. The version is read from <package version="..."> in the OPF. Cover detection tries both the EPUB2 convention (<meta name="cover" content="item-id">) and the EPUB3 convention (<item properties="cover-image">).
Can it read DRM'd EPUBs (Adobe ADEPT / Apple FairPlay)?: This tool only parses the central directory, container.xml, and OPF, so DRM-encrypted bodies can't be decrypted. Bibliographic data (title, author, etc.) is usually still readable as long as the OPF itself isn't encrypted. If the OPF is encrypted, you'll see an "OPF not found" error.
What if the cover image is missing or wrong?: When the EPUB's cover metadata is incomplete, the viewer falls back to the first image file in the manifest (with a jpeg/png/gif/webp media-type). If none is found, the cover section is hidden. Older books sometimes ship without a properly registered cover.
Can I read the actual chapter contents?: No — this tool focuses on metadata. To read the book, use a dedicated reader (Apple Books / Calibre / Thorium). This tool is for quickly answering "what is this EPUB?".

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