diff --git a/sort_certificate.py b/sort_certificate.py
index 8ad4de3..0adf4ae 100755
--- a/sort_certificate.py
+++ b/sort_certificate.py
@@ -289,6 +289,10 @@ def handle_args():
                            help='Omit key from output')
     outputgrp.set_defaults(print_key=True)
 
+    parser.add_argument('-i', '--informational',
+                        action='store_true',
+                        help='Show some information about the PEM blocks')
+
     parser.add_argument('x509files',
                         metavar='x509 file',
                         nargs='*',
@@ -417,12 +421,13 @@ def main():
             logging.info('Subject: %s', x509_subject)
             logging.info('Issuer: %s', x509_issuer)
 
-            logging.info(CERTINFO_TEMPLATE.format(
-                subject=x509_subject,
-                issuer=x509_issuer,
-                notbefore=x509_not_before.strftime(OPENSSLTIME_FMT),
-                notafter=x509_not_after.strftime(OPENSSLTIME_FMT),
-                sha1fingerprint=x509_object.digest('sha1').decode()))
+            if args.informational:
+                print(CERTINFO_TEMPLATE.format(
+                    subject=x509_subject,
+                    issuer=x509_issuer,
+                    notbefore=x509_not_before.strftime(OPENSSLTIME_FMT),
+                    notafter=x509_not_after.strftime(OPENSSLTIME_FMT),
+                    sha1fingerprint=x509_object.digest('sha1').decode()))
 
             if not args.check:
                 print(crypto.dump_certificate(crypto.FILETYPE_PEM,