WhatsApp can do more than send messages and photos. A hidden tool inside the app turns stacks of paper into tidy digital files in just a few taps.

You can save a PowerPoint presentation as a PDF to lock its content and formatting in place, so that other people can view ...

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

In the top menu of Excel select Data > Get Data > From File > From PDF. Browse your files and select the PDF with the table ...