And that’s how you make a single PDF out of several PDF files using various ways on your Windows 11 computer. It’s also possible to combine images into a PDF file if you’d like to do that.

You can convert Apple's HEIC files to PDF on a Mac or Windows computer using the free Convertio website.

There's no need for a paid Adobe Acrobat subscription. These built-in and free tools let you merge PDF files quickly.