How to Sign a PDF Document on Android Unlike an iPhone or iPad, the default file manager that comes pre-installed with most Android skins doesn’t offer a built-in PDF signing feature.

This how-to guide will show you how to create an electronic signature and use it to sign a PDF file in Windows, MacOS, Android or iOS.

How to Sign PDFs on Mac On your Mac, you use the built-in Preview app so you can sign the PDFs. Just locate the PDF file that you want to sign using the Finder feature, according to MacRumors.

If you want to sign a PDF, this post talks of free tools that let you add a signature to PDF. Type or draw a signature using them.

Signing documents with your iPhone How to sign PDF documents on your iPhone For iPhone users, one of the easiest ways to sign a PDF document is to use the tools built into the Mail app.