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Old 08-13-2026, 09:34 AM   #1
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Is there a way to get Calibre to write metadata to PDFs without having to save/export
I setting up a new Calibre library to catalog all my RPG PDFs. I found a DriveThruRPG plugin that works well for pulling down metadata. But I noticed, at least for PDFs, that the metadata gets written to the metadata.opf file, but not to the PDF directly. If I save/export the PDF, I have the option to embed the metadata.

Is there a way to embed the metadata when I download it? Or can I run the ebook-meta command line tool to embed the metadata based on the metadata.opf file?
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Old 08-13-2026, 05:50 PM   #2
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Try the Embed Metadata feature, I access it via a shortcut to the All actions menu, but it can be added to any toolbar/menu :

Click image for larger version Name: calibre - embed metadata.jpg Views: 13 Size: 114.9 KB ID: 225145

The primary location for metadata is the library database (metadata.db). The metadata.opf file in the book folders are used to rebuild the library database should it became corrupted.

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