diff --git a/README.rst b/README.rst
index a730605..e0d769d 100644
--- a/README.rst
+++ b/README.rst
@@ -130,7 +130,7 @@ Changelog
 Version 1.2.1 (next version)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-* (no changes yet)
+* Changed ``--format=dump`` output to collapse multiple subsequent identical lines into a single ``*``.
 
 Version 1.2.0
 ^^^^^^^^^^^^^
diff --git a/rsrcfork/__main__.py b/rsrcfork/__main__.py
index dbd6f31..6e18f7d 100644
--- a/rsrcfork/__main__.py
+++ b/rsrcfork/__main__.py
@@ -155,11 +155,22 @@ def _filter_resources(rf: api.ResourceFile, filters: typing.Sequence[str]) -> ty
 	return list(matching.values())
 
 def _hexdump(data: bytes):
+	last_line = None
+	asterisk_shown = False
 	for i in range(0, len(data), 16):
 		line = data[i:i + 16]
-		line_hex = " ".join(f"{byte:02x}" for byte in line)
-		line_char = line.decode(_TEXT_ENCODING).translate(_TRANSLATE_NONPRINTABLES)
-		print(f"{i:08x} {line_hex:<{16*2+15}} |{line_char}|")
+		# If the same 16-byte lines appear multiple times, print only the first one, and replace all further lines with a single line with an asterisk.
+		# This is unambiguous - to find out how many lines were collapsed this way, the user can compare the addresses of the lines before and after the asterisk.
+		if line == last_line:
+			if not asterisk_shown:
+				print("*")
+				asterisk_shown = True
+		else:
+			line_hex = " ".join(f"{byte:02x}" for byte in line)
+			line_char = line.decode(_TEXT_ENCODING).translate(_TRANSLATE_NONPRINTABLES)
+			print(f"{i:08x} {line_hex:<{16*2+15}} |{line_char}|")
+			asterisk_shown = False
+		last_line = line
 	
 	if data:
 		print(f"{len(data):08x}")