See everything hidden inside a PDF — author and title info, XMP data, embedded JavaScript, hidden file attachments — then edit, add, or remove it. Nothing is ever uploaded; everything happens in this browser tab.
A PDF's visible page often isn't the whole story. The document's metadata can quietly record the real name of whoever wrote it (even if the text itself is anonymous), the software and company that produced it, and sometimes embedded scripts or attached files nobody meant to share. This kind of thing has outed anonymous authors and leaked internal file paths in real incidents. A quick check before sending a PDF out into the world avoids handing over more than you intended.
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