Free Download Secure-PDF Professional full version standalone offline installer for Windows. It is a security toolbox for PDF files, including encryption and signing.

Overview of Secure-PDF Professional

This program is a security toolbox including encryption and signing for PDF documents. With it, you can encrypt your own or other people’s PDF documents with up to 256-bit key strength (AES).

Add a password to open it so that users can only view the encrypted document by entering the correct password.

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To guarantee the recipients of your PDF documents that the corresponding document is original and has not been manipulated afterward, a feature for digital signing is available in Secure-PDF.

Features of Secure-PDF Professional

  • Security toolbox for PDF files including encryption and signing
  • Add watermarks to PDF
  • Encrypt PDF files
  • Digitally sign PDF’s
  • Set owner information of a PDF document

Technical Details and System Requirements

  • Supported OS: Windows 11, Windows 10, Windows 8.1, Windows 7
  • RAM (Memory): 2 GB RAM (4 GB recommended)
  • Free Hard Disk Space: 200 MB or more