How to convert OPF to EPUB
- Add your .OPF file - drop it in the box above or click to browse.
- Convert it to .EPUB in a few seconds.
- Download your new .EPUB file.
What to expect
- An
.opffile contains no chapter text - only metadata and file references; the actual content lives in the XHTML files alongside it. - If any files from the unpacked EPUB folder are missing, the resulting EPUB will have broken chapters or images that cannot be recovered.
- The final
.epubmust store themimetypefile first and without compression; Calibre and Sigil handle this correctly - manual re-zipping often gets it wrong.
Frequently asked questions
I only have the `.opf` file - the rest of the folder is missing. Can I recover my book?
No. The OPF lists the chapters but does not contain them; without the XHTML and resource files, the book content is not recoverable.
Can I convert OPF directly to PDF or MOBI?
Not directly. First reassemble the full
.epub using Calibre or Sigil, then use Calibre's Convert books feature to output PDF, AZW3, or MOBI.Does the OPF change when I reassemble the EPUB?
No - Calibre and Sigil package the existing files as-is and preserve the OPF structure, though they may fix minor formatting issues.
What is the `metadata.opf` file in my Calibre library folder?
That is Calibre's own catalog record for the book, not an unpacked EPUB - you do not need to convert or process it.
