PDFEncrypt is a free, open-source native Windows app that allows you to password protect (encrypt) PDF files for free, without purchasing expensive software.

SHA1SUM: 5158c2778ab68d3fa2beae936c79db6a08fe6cdc

Download Installer without .Net Framework
SHA1SUM: d3ca4d02aaf7f629dbf9162ccb2674d14eaee608

SHA1SUM: f8078a3197d125b6e1f2555b54939ba09547fea3

About The App
PDFEncrypt is a free, open-source utility to encrypt PDF files using standard PDF encryption algorithms.  When a document is encrypted, its contents become unreadable. An authorized user can decrypt the document to obtain access to the contents. If a PDF document is encrypted with a password, the user must specify the password before the document can be viewed in Adobe Reader or Adobe Acrobat.
PDFEncrypt provides a means to encrypt any standard PDF document for free, without the need to purchase the Adobe Acrobat software or upload your confidential PDF files to a third-party server for encryption.  The app runs directly on your Windows PC and allows you to specify a password (required to open the document) as well as many options and permissions to apply to the PDF file.

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.

PDFEncrypt is popular worldwide!

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Need Stronger Protection?

For stronger protection than passwords, use Locklizard PDF DRM to protect your PDF files from copying & sharing.

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