PDF Attachment Extractor

A PDF can carry other files inside it: the XML data of a hybrid e-invoice (Factur-X / ZUGFeRD), the spreadsheet behind a report, source documents in a PDF portfolio, or files pinned to a page with a paper-clip icon. Many viewers hide them. This tool lists every attachment with its name, size, location and description and lets you save each one — or all of them as a ZIP. It works in your browser; nothing is uploaded.

How to use this tool

1. Choose one or more PDFs.
2. See how many files are attached and where: to the document, or to a page.
3. Download a file, or use "Download all as ZIP" when there are several.
4. Only open attachments from sources you trust.

Formula

Document-level attachments are read from the catalog's /Names /EmbeddedFiles name tree; page-level ones from FileAttachment annotations. Each file specification's /EF stream is decoded to the original bytes, and the name comes from /UF (Unicode) or /F. Descriptions, MIME types and dates come from /Desc and the stream's /Subtype and /Params.

Example

A German e-invoice (ZUGFeRD) of 2 pages shows 1 attachment: factur-x.xml, about 12 KB, "Attached to the document", description "Invoice data". Saving it gives the machine-readable invoice that accounting software imports.