This article explains how to save a PDF on an iPhone or iPad from the web, and how to transfer a PDF from a Mac or Windows PC to your iOS device. These instructions may also work for third-party apps.

The Safari web browser and the Mail app use a similar interface for downloading and previewing PDF files.

Select the PDF file to open a preview.

Tap Share to open the sharing panel, where you'll find options for sharing and saving files, such as PDFs.