diff --git a/zshrc b/zshrc
index 7b7abb8..52928e1 100644
--- a/zshrc
+++ b/zshrc
@@ -3815,6 +3815,11 @@ if command -v rg &> /dev/null; then
     }
 fi
 
+# diff binary files
+bindiff() {
+    vimdiff <(xxd $1) <(xxd $2)
+}
+
 # add local binaries
 if [[ -r ~/bin ]]; then
     PATH=$PATH:~/bin