diff --git a/.clang-format b/.clang-format
new file mode 100644
index 00000000..4dc17e9b
--- /dev/null
+++ b/.clang-format
@@ -0,0 +1,4 @@
+# https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+BasedOnStyle: Google
+IndentWidth: 4
+UseTab: Never
diff --git a/scripts/format.py b/scripts/format.py
new file mode 100644
index 00000000..6975b440
--- /dev/null
+++ b/scripts/format.py
@@ -0,0 +1,21 @@
+import os
+import subprocess
+
+def get_all_files(root: str):
+    for path, _, files in os.walk(root):
+        for file in files:
+            fullpath = os.path.join(path, file)
+            # ignore some files
+            if fullpath.startswith('include/pybind11'):
+                continue
+            if file.startswith('_'):
+                continue
+            if not file.endswith('.cpp') and not file.endswith('.h') and not file.endswith('.hpp'):
+                continue
+            yield fullpath
+
+if __name__ == '__main__':
+    files = list(get_all_files('src'))
+    files.extend(get_all_files('src2'))
+    files.extend(get_all_files('include'))
+    subprocess.run(['clang-format-15', '-i'] + files, check=True)