Windows allows you to convert any image file with JPG, JPEG, PNG format to PDF without installing any third-party software via Windows Photos App.

How can I convert an image to PDF? Windows and macOS already offer integrated on-board tools with which you can convert images to PDF without installing additional software.

From the Files app that comes with iOS, for example, you can convert images into PDF files by long pressing on them and choosing Create PDF from the menu that comes up.