PDFEncrypt is a free, open-source native Windows app that allows you to password protect (encrypt) PDF files for free, without purchasing expensive software.
Download Installer without .Net Framework
This app uses the iTextPDF open source library for encryption operations, and is released under the AGPL license. Complete source code is available on GitHub, and you can download the installer for Windows 7, 8, 10, and 11 below.
MSI available (beta)
Users have requested a MSI package for use with Windows Active Directory. I built the PDFEncrypt V1 MSI using the free version of Advanced Installer. It has been tested on Windows 10 x64 and Windows 11 x64. Note that the MSI does not include .NET framework, so you...
Review and get free gift cards
We have set up a review link on Capterra to try and reach more people with the app. The first 85 people to review PDFEncrypt will get free gift cards. Here's the link: Review PDFEncrypt on Capterra
Now available in the Microsoft Store!
I'm excited to announce that the PDFEncrypt app is now available in the Microsoft Store!
New release: command line arguments, owner password
Command-line arguments The latest release includes support for command-line arguments. This feature allows PDFEncrypt to be fully automated and incorporated into existing user workflows. The following command-line options are available: -i [input filename] or...
Our first reciprocal ad
We are excited to announce that we have made our first reciprocal ad agreement. The footer ad appearing at the bottom of each page is displayed in association with an unpaid, reciprocal-link agreement with LockLizard, who provides DRM solutions for secure document...
Download the latest version
Get the most recent version of PDFEncrypt to gain access to the latest features and updates.
Get the source code
PDFEncrypt is a free, open-source application. The source code is available on GitHub.
PDFEncrypt is popular worldwide!
If you find this software helpful, a donation helps me keep it going.
Need Stronger Protection?
For stronger protection than passwords, use Locklizard PDF DRM to protect your PDF files from copying & sharing.
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If you like PDFEncrypt, please submit Feedback to help me understand how the app can be improved. Thanks!