diff --git a/y2023/localizer/utils.h b/y2023/localizer/utils.h
new file mode 100644
index 0000000..8241cf8
--- /dev/null
+++ b/y2023/localizer/utils.h
@@ -0,0 +1,14 @@
+#ifndef Y2023_LOCALIZER_UTILS_H_
+#define Y2023_LOCALIZER_UTILS_H_
+
+#include <Eigen/Dense>
+
+#include "frc971/vision/target_map_generated.h"
+
+namespace y2023::localizer {
+// Converts a TargetPoseFbs into a transformation matrix.
+Eigen::Matrix<double, 4, 4> PoseToTransform(
+    const frc971::vision::TargetPoseFbs *pose);
+}  // namespace y2023::localizer
+
+#endif  // Y2023_LOCALIZER_UTILS_H_