This app is a free tool to attach any files to an existing PDF. You can attach any type of files to a PDF in a document/page level. If you move this PDF to a new location, the attachments move with it. You can also add multiple file attachments, and attach a file in a specified page. Supports remove all attachments from a PDF file, and List all attachments in a PDF file. You can select files to attach from your local computer and from Google Drive directly.