Creating a PDF can be easily done on various devices, including iPhone, Mac, Windows, and other computers, without the need for specialized software. Saving web pages as PDFs is also a straightforward process that involves using the Share icon to print the webpage and then saving it to files or choosing where to save it. Additionally, converting file types into PDFs can be done using apps like CloudConvert, PDF.co, and pdfFiller, which offer various features such as automatic conversion from emails or files to PDFs, and integration with cloud storage apps for seamless management.