Does this let me edit the EPUB's metadata, or just view it?

View only — it's built for quickly checking a book's details, not modifying the file.

Why is an EPUB's metadata stored inside what's basically a ZIP file?

The EPUB format is built on top of the ZIP container format, bundling the book's text, styling and metadata together as one package — this tool unpacks that structure to read the metadata out.

Which metadata fields does it show?

Title, author and the other standard catalog fields embedded in the EPUB's internal metadata file.

Does EPUB Metadata Viewer upload my files to a server?

No. EPUB Metadata Viewer runs entirely in your browser using on-device processing, your files never leave your device.

EPUB Metadata Viewer

View an EPUB ebook's title, author and other metadata.

Runs in your browser

Drop an EPUB file here

Choose File

Runs entirely in your browser, nothing is uploaded to a server.

About this tool

An EPUB file is technically a ZIP archive containing an ebook's text, formatting and metadata — its title, author and other details are stored in an internal file, not something a typical file browser surfaces directly. This tool reads and displays an EPUB's metadata, letting you check a book's title, author and other catalog details without opening it in a dedicated e-reader app.

Frequently asked questions

File Metadata Viewer

View a file's name, size, type and last-modified date.

New

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