JSignPdf (opens in new tab)

JSignPdf is a free, open source application that adds digital signatures to PDF documents. It supports visible and hidden signatures, certificate levels, timestamping, and batch processing from the command line. Features: Visible and hidden digital signatures Certificate levels and timestamping (TSA) PDF encryption and rights management Certificate revocation checks (CRL, OCSP) Command-line batch processing PKCS#11 hardware token support Additional information:Developer: JSignPdf ProjectLicen...