EPUB metadata controls how a book is identified in readers and distribution systems. Incorrect titles, missing authors, or the wrong language can make an otherwise readable ebook difficult to organize and publish.
Metadata you can change
The package document can contain:
- Title and subtitle information.
- One or more creators and contributor roles.
- Language.
- Publisher and publication date.
- Description.
- Identifiers such as an internal UUID or ISBN.
- Rights statements.
- Subjects and tags.
- EPUB 3 modification time.
Not every reader displays every field, but the package should still preserve correct and complete data.
Edit EPUB metadata in three steps
- Open the EPUB Metadata Editor and choose a DRM-free EPUB.
- Review the existing values and change only the fields that are wrong.
- Download the newly packaged EPUB and inspect it before distribution.
The editor creates a separate file. It does not overwrite the source ebook on your device.
Avoid destructive metadata rewriting
An EPUB package can contain refinements, custom prefixes, multiple creators, accessibility metadata, and vendor-specific records that a simple form does not show. A safe editor should not discard this information merely because it is outside the visible fields.
EPUB Toolset is designed to update requested values while preserving unrelated package elements wherever possible. Identifiers also need care: changing a publication identifier is not the same as correcting a display title.
Metadata and cover are related but different tasks
Some EPUB 2 books identify the cover through metadata, while EPUB 3 normally marks the image resource with cover-image. Because replacing artwork requires manifest and file changes, use the dedicated EPUB Cover Editor rather than treating the cover as a normal text field.
After editing, open the result in the EPUB Viewer and run the formal checks required by the target publisher.