Coming from a presentation of an object on iiif.crossasia.org the link to the manifest of that object is already entered. You can also use this tool to produce PDFs from other manifests by entering their URL below. Click on „generate PDF“ to generate a PDF on the basis of the iiif manifest. The PDF opens in a new browser tab from where you can download the file. Before generating the PDF you can adjust the image size using the cog wheel in order to speed-up the process and reduce the PDF size.