diff --git a/scripts/imgtool/main.py b/scripts/imgtool/main.py
index f2e246e..920df78 100755
--- a/scripts/imgtool/main.py
+++ b/scripts/imgtool/main.py
@@ -74,6 +74,11 @@
         signature = base64.b64decode(f.read())
         return signature
 
+def save_signature(sigfile, sig):
+    with open(sigfile, 'wb') as f:
+        signature = base64.b64encode(sig)
+        f.write(signature)
+
 def load_key(keyfile):
     # TODO: better handling of invalid pass-phrase
     key = keys.load(keyfile)
@@ -313,6 +318,9 @@
               'the signature calculated using the public key')
 @click.option('--fix-sig-pubkey', metavar='filename',
               help='public key relevant to fixed signature')
+@click.option('--sig-out', metavar='filename',
+              help='Path to the file to which signature will be written'
+              'The image signature will be encoded as base64 formatted string')
 @click.command(help='''Create a signed or unsigned image\n
                INFILE and OUTFILE are parsed as Intel HEX if the params have
                .hex extension, otherwise binary format is used''')
@@ -321,7 +329,7 @@
          endian, encrypt_keylen, encrypt, infile, outfile, dependencies,
          load_addr, hex_addr, erased_val, save_enctlv, security_counter,
          boot_record, custom_tlv, rom_fixed, max_align, clear, fix_sig,
-         fix_sig_pubkey):
+         fix_sig_pubkey, sig_out):
 
     if confirm:
         # Confirmed but non-padded images don't make much sense, because
@@ -388,6 +396,10 @@
                custom_tlvs, int(encrypt_keylen), clear, baked_signature, pub_key)
     img.save(outfile, hex_addr)
 
+    if sig_out is not None:
+        new_signature = img.get_signature()
+        save_signature(sig_out, new_signature)
+
 
 class AliasesGroup(click.Group):