diff --git a/README.md b/README.md
index eb47c6e..13fbabd 100644
--- a/README.md
+++ b/README.md
@@ -24,17 +24,18 @@ You may need to add `~/bin` to your PATH variable if not already done. See [here
 
 # Usage
 ```help
-    usage: vimtabdiff.py [-h] [--vim VIM] pathA pathB
+usage: vimtabdiff.py [-h] [--vim VIM] [--onlydiffs] pathA pathB
 
-    Show diff of files from two directories in vim tabs
+Show diff of files from two directories in vim tabs
 
-    positional arguments:
-      pathA
-      pathB
+positional arguments:
+  pathA
+  pathB
 
-    options:
-      -h, --help  show this help message and exit
-      --vim VIM   vim command to run
+options:
+  -h, --help  show this help message and exit
+  --vim VIM   vim command to run
+  --onlydiffs  only open files where there is a diff
 ```
 
 ## Relevant vim tips
diff --git a/vimtabdiff.py b/vimtabdiff.py
index d84705b..0db3849 100755
--- a/vimtabdiff.py
+++ b/vimtabdiff.py
@@ -29,6 +29,9 @@ def parse_args() -> argparse.Namespace:
     parser.add_argument("pathA", type=Path)
     parser.add_argument("pathB", type=Path)
     parser.add_argument("--vim", help="vim command to run", default="vim")
+    parser.add_argument(
+        "--onlydiffs", help="only open files where there is a diff", action="store_true"
+    )
     return parser.parse_args()
 
 
@@ -78,6 +81,12 @@ def main() -> None:
         for a, b in get_file_pairs(args.pathA, args.pathB):
             aPath = a.resolve() if a else os.devnull
             bPath = b.resolve() if b else os.devnull
+            if (
+                args.onlydiffs
+                and a and b
+                and open(aPath, mode="rb").read() == open(bPath, mode="rb").read()
+            ):
+                continue
             print(f"tabedit {aPath} | vsp {bPath}", file=vimCmdFile)
         cmds = f"""
         tabdo windo :1