EPUB Metadata Viewer
The EPUB metadata viewer opens an e-book file and shows its title, authors, language, publisher, publication date, identifiers such as the ISBN, description, subjects, EPUB version, cover image and how many chapters and files it contains. Use it to check a book before you publish it or to fix a library that shows the wrong details.
Read EPUB metadata
What is inside an EPUB
An EPUB is a ZIP file. A small file called META-INF/container.xml points to the package document (usually content.opf), which lists the book’s metadata, every file in the book (the manifest) and the reading order (the spine). This tool follows those pointers in your browser and displays what it finds.
Metadata fields
| Field | Purpose |
|---|---|
| Title, creator | What reading apps and stores show in the library. |
| Language | A code such as en or ur. Needed for hyphenation, text-to-speech and store listings. |
| Identifier | A unique ID such as an ISBN or UUID. Stores and apps use it to recognise the book. |
| Publisher, date, rights | Optional details shown in book information screens. |
| Version | 2.0 or 3.x. Version 3 adds richer features and requires a navigation document. |
| Spine items | The number of reading-order documents, roughly the chapters or sections. |
Common problems
- Missing language: many stores reject books without one.
- Wrong or empty title: the book shows as the file name in some apps.
- Duplicate or missing identifier: libraries may merge different books or lose reading progress.
- No cover: add a cover image and mark it in the package file.
Frequently asked questions
Is my e-book uploaded?
No. The file is unzipped and read in your browser.
Does it work with Kindle files?
No. It reads EPUB files only. Kindle formats such as AZW3 and MOBI are different.
Can it read DRM-protected books?
Metadata is often readable, but the book text of DRM-protected files is encrypted and cannot be opened.