diff --git a/include/aare/RemapFormat.hpp b/include/aare/RemapFormat.hpp
new file mode 100644
index 0000000..96d45c2
--- /dev/null
+++ b/include/aare/RemapFormat.hpp
@@ -0,0 +1,12 @@
+#pragma once
+
+#include "aare/RemapDefs.hpp"
+
+namespace aare::remap::format {
+static inline std::string toString(defs::Rotation);
+static inline std::string toString(defs::SensorPixelGeometry const &g);
+static inline std::string toString(defs::SensorStrixelGeometry const &g);
+static inline std::string toString(defs::SensorGroupConfig const &c);
+inline std::ostream &operator<<(std::ostream &os,
+                                defs::SensorGroupConfig const &c);
+} // namespace aare::remap::format
\ No newline at end of file
diff --git a/src/RemapFormat.cpp b/src/RemapFormat.cpp
new file mode 100644
index 0000000..4020f42
--- /dev/null
+++ b/src/RemapFormat.cpp
@@ -0,0 +1,48 @@
+#include "aare/RemapFormat.hpp"
+
+#include <sstream>
+
+namespace aare::remap::format {
+static inline std::string toString(defs::Rotation r) {
+    return (r == defs::Rotation::Normal ? "Normal" : "Inverse");
+}
+
+static inline std::string toString(defs::SensorPixelGeometry const &g) {
+    std::ostringstream os;
+
+    os << "SensorPixelGeometry\n"
+       << " cols x rows: " << g.cols << " x " << g.rows << "\n"
+       << " guardring  :\n"
+       << "   x = " << g.guardring.x << "\n"
+       << "   y = " << g.guardring.y << "\n";
+
+    return os.str();
+}
+
+static inline std::string toString(defs::SensorStrixelGeometry const &g) {
+    std::ostringstream os;
+
+    os << "SensorStrixelGeometry\n"
+       << " multiplicity: " << g.multiplicity << "\n"
+       << " pitch       : " << g.pitch_um << " um\n";
+
+    return os.str();
+}
+
+static inline std::string toString(defs::SensorGroupConfig const &c) {
+    std::ostringstream os;
+
+    os << "SensorGroupConfig\n"
+       << toString(c.pixel) << "\n"
+       << toString(c.strixel) << "\n"
+       << " placement on sensor:\n"
+       << c.placement_on_sensor << "\n";
+
+    return os.str();
+}
+
+inline std::ostream &operator<<(std::ostream &os,
+                                defs::SensorGroupConfig const &c) {
+    return os << toString(c);
+}
+} // namespace aare::remap::format
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