pdfsig(1) Portable Document Format (PDF) digital signatures tool


pdfsig [options] [PDF-file]


pdfsig verifies the digital signatures in a PDF document. It also displays the identity of each signer (commonName field of the signer certificate) and the time and date of the signature.

The signer certificate validation uses the trusted certificates stored in the following locations:

  • The NSS Certificate database in the default Firefox profile.
  • The NSS Certificate database in /etc/pki/nssdb.


Do not validate the certificate.
Print copyright and version information.
Print usage information. (-help and --help are equivalent.)


The pdfsig software and documentation are copyright 1996-2004 Glyph & Cog, LLC and copyright 2005-2015 The Poppler Developers - http://poppler.freedesktop.org