JSignPdf

JSignPdf is a Java-based application designed to apply digital signatures to PDF documents. Operating on Linux systems, the tool allows users to sign files through a simple graphical user interface or via command line scripts for batch processing. It supports various keystore types, including PKCS12, PKCS11, and Java KeyStore, enabling integration with hardware tokens and software certificates. Users can also configure signature appearance properties such as visible signature placement, reason, location, and contact information directly on the document pages. Additionally, the software provides options for time-stamping signatures via Time Stamping Authority servers to ensure long-term validation capabilities.