
PDFEncrypt
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

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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