Books imports
- Ebooks: EPUB, PDF, and plain text (
.txt), up to 200 MB per upload. - Audiobooks: MP3 and M4B; a single file or up to 500 chapter files can form one audiobook, with a 1 GB limit per uploaded audio file.
- Cover art: JPG, PNG, or WebP, up to 20 MB.
Project Gutenberg downloads supported ebook formats. LibriVox downloads are stored as chapter MP3 files.
Other Files viewers
Files opens formats supported by the installed Vault viewers, including common images, video, PDF, text, EPUB, and CBZ. A format that has no installed viewer remains safely stored and can be downloaded for use in another application.
The Books OPDS catalog includes ebooks only; audiobooks are not published through OPDS.