How to batch convert JPG files to PDF?

I have a large number of JPG images that I need to convert into PDF files. In some cases, each image should be saved as a separate PDF, while in others, I need to combine several images into a single PDF in the correct order.

Doing this manually would take a long time, so I’m looking for a free and reliable method that can handle both tasks efficiently. It would be helpful if it could work offline, and I’m also open to using third-party software.

Could anyone recommend a suitable solution? 

Thanks in advance.