diff --git a/tools/format-all.sh b/tools/format-all.sh
new file mode 100644
index 000000000..15e8f3531
--- /dev/null
+++ b/tools/format-all.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+#
+# Format all C++ files in repo
+#
+# Author: Steffen Vogel <post@steffenvogel.de>
+# SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
+# SPDX-License-Identifier: Apache-2.0
+
+TOP_DIR=$(git rev-parse --show-toplevel)
+
+find ${TOP_DIR} -iname "*.cpp" -o -iname "*.hpp" -o -iname "*.h" -o -iname "*.c" | \
+    xargs clang-format --verbose -i