JSignPdf – add digital signatures to PDF documents

Last Updated on June 25, 2026

JSignPdf is an application that adds digital signatures to PDF documents.

The application uses the OpenPDF library for PDF manipulations.

This is free and open source software.

Features include:

• Visible signatures – image and/or description located visually in a PDF file (page and position can be specified).
• Several different keystore types (as provided by Java).
• Timestamps from authority in signature (TSA).
• Certificate validation through CRL and/or OCSP.
• Setting certification level.
• Setting hash algorithm.
• PDF encryption and setting rights.
• Comprehensive Swing GUI.
• Support for batch processing (controlled by command line arguments, without GUI).

Website: jsignpdf.eu
Support: GitHub Code Repository
Developer: Josef Cacek
License: Mozilla Public License Version 2.0 and GNU Lesser General Public License 2.1

JSignPdf is written in Java. Learn Java with our recommended free books and free tutorials.

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