Embed any files inside a PDF so they travel with the document — sources, spreadsheets, originals.
In full PDF readers like Adobe Acrobat or Foxit, open the attachments (paperclip) panel. Note that many browser built-in viewers don’t display attachments at all — the files are still inside the PDF.
Yes — roughly by the size of the attached files. They’re stored inside the PDF itself.
This tool runs entirely in your browser. Your file is processed on your device and is not uploaded to a server.