If you want to password-protect your PDF documents from outside interference, then maybe you should give PDF Page Lock a test run. It is a free encryption software that lets you easily encrypt PDF ...

This post covers free tools to password protect PDF online in Windows 11/10. You can also set copy, modify, and print permissions to PDF.

A free, open-source alternative to Acrobat is PDFEncrypt, which offers a simple yet effective way to password protect a PDF. The basic interface asks you to choose the file you wish to encrypt.

How to encrypt and password-protect ZIP files the right way This tip was originally published on IDG Answers, a reader-powered help desk for answering tech questions.

With a few steps you can set up an easy way to encrypt PDF files generated from the standard print dialog window.