PDF Power Tool 4.0

Enhance your documents and other materials in PDF. Work with a utility providing command-line access to your files for integrating customizable signatures. Adjust the certification elements and control their placement on the pages, preview the results, etc.

PDF Power Tool is a free program that will enable you to digitally sign PDF files from a command line. All you need to get started is a certificate and a PDF file. You can make the signature visible in the document with the /DISPLAYSIGNATURE command line switch.