How to Encrypt a PDF File for Email for Free: 4 Ways
This guide shows you how to encrypt a PDF for email using JOPDF, Mac Preview, Adobe Acrobat, and online tools.
Dec 17,2025 by Queena
How to Make a PDF Non-Editable or Read-Only: Easy Guide
Learn how to make a PDF non-editable or read-only. Discover how to password-protect, change permissions, and flatten a PDF to secure your documents.
Nov 26,2025 by Queena
How to Open Password Protected PDF | Even Without Password
This guide will show you how to open password protected PDF. Whether you know the password or not, you can find a way here.
Nov 19,2025 by Queena
How to Password Protect a PDF for Free on Windows and Mac
How can you securely share a PDF that contains sensitive and important information? Adding password protection is key. In this article, let's explore how to password protect a PDF to prevent unauthorized access and malicious modification.
Nov 5,2025 by Queena
How to Lock a PDF from Editing with/Without a Password
To prevent accidental or malicious modifications, we can add a password to lock the PDF. In addition, we can also apply digital rights management (DRM) protection without a password. Read this article to learn all about how to use how to lock a PDF from editing!
Oct 29,2025 by Queena
