Learn how to visually compare two PDF documents using free GUI-based software, a command-based tool, or an online tool for Windows 11/10.

I am not sure why but people treat PDF differently than image files so I don't think there are very many that work for quickly viewing PDF *and* image files but you can certainly use something ...

If you have a confidential PDF you want to password protect, you have a few ways to do that on your Windows 11 PC. You can use a desktop app or a web-based tool to encrypt your PDF files.

Open-source might not be the first thing you think of with Windows, but these free tools can seriously boost your productivity.

To do this, you open the PDF in Acrobat, select “File”, then “Compress PDF”, and then choose where you want to save the reduced PDF.