Re: Error 413

I used this site to convert my .jpg's to .pdf
https://www.convert-jpg-to-pdf.net/

Maybe this one will work for you?
https://png2pdf.com/

I was able to convert a one of the manuals to a pdf, but the pages were out of order. The numbering order of the original png files is correct, but I can't reorder the pages or anything like that without having some sort of subscription. I'm using Adobe Acrobat Reader. X(