diff --git a/checker/internal/BUILD b/checker/internal/BUILD
index 777457830..20c476db2 100644
--- a/checker/internal/BUILD
+++ b/checker/internal/BUILD
@@ -130,7 +130,6 @@ cc_library(
         "type_checker_impl.h",
     ],
     deps = [
-        ":format_type_name",
         ":namespace_generator",
         ":proto_type_mask",
         ":type_check_env",
@@ -149,6 +148,7 @@ cc_library(
         "//common:container",
         "//common:decl",
         "//common:expr",
+        "//common:format_type_name",
         "//common:standard_definitions",
         "//common:type",
         "//common:type_kind",
@@ -243,8 +243,8 @@ cc_library(
     srcs = ["type_inference_context.cc"],
     hdrs = ["type_inference_context.h"],
     deps = [
-        ":format_type_name",
         "//common:decl",
+        "//common:format_type_name",
         "//common:standard_definitions",
         "//common:type",
         "//common:type_kind",
@@ -275,17 +275,6 @@ cc_test(
     ],
 )
 
-cc_library(
-    name = "format_type_name",
-    srcs = ["format_type_name.cc"],
-    hdrs = ["format_type_name.h"],
-    deps = [
-        "//common:type",
-        "//common:type_kind",
-        "@com_google_absl//absl/strings",
-    ],
-)
-
 cc_library(
     name = "descriptor_pool_type_introspector",
     srcs = ["descriptor_pool_type_introspector.cc"],
diff --git a/checker/internal/type_checker_impl.cc b/checker/internal/type_checker_impl.cc
index 6b6b051b1..f3a06a28d 100644
--- a/checker/internal/type_checker_impl.cc
+++ b/checker/internal/type_checker_impl.cc
@@ -36,7 +36,6 @@
 #include "absl/types/optional.h"
 #include "absl/types/span.h"
 #include "checker/checker_options.h"
-#include "checker/internal/format_type_name.h"
 #include "checker/internal/namespace_generator.h"
 #include "checker/internal/type_check_env.h"
 #include "checker/internal/type_checker_builder_impl.h"
@@ -52,6 +51,7 @@
 #include "common/constant.h"
 #include "common/decl.h"
 #include "common/expr.h"
+#include "common/format_type_name.h"
 #include "common/standard_definitions.h"
 #include "common/type.h"
 #include "common/type_kind.h"
diff --git a/checker/internal/type_inference_context.cc b/checker/internal/type_inference_context.cc
index 1a87d9e15..4681784af 100644
--- a/checker/internal/type_inference_context.cc
+++ b/checker/internal/type_inference_context.cc
@@ -28,8 +28,8 @@
 #include "absl/strings/string_view.h"
 #include "absl/types/optional.h"
 #include "absl/types/span.h"
-#include "checker/internal/format_type_name.h"
 #include "common/decl.h"
+#include "common/format_type_name.h"
 #include "common/standard_definitions.h"
 #include "common/type.h"
 #include "common/type_kind.h"
@@ -657,14 +657,14 @@ bool TypeInferenceContext::AssignabilityContext::IsAssignable(const Type& from,
 std::string TypeInferenceContext::DebugString() const {
   return absl::StrCat(
       "type_parameter_bindings: ",
-      absl::StrJoin(
-          type_parameter_bindings_, "\n ",
-          [](std::string* out, const auto& binding) {
-            absl::StrAppend(
-                out, binding.first, " (", binding.second.name, ") -> ",
-                checker_internal::FormatTypeName(
-                    binding.second.type.value_or(Type(TypeParamType("none")))));
-          }));
+      absl::StrJoin(type_parameter_bindings_, "\n ",
+                    [](std::string* out, const auto& binding) {
+                      absl::StrAppend(
+                          out, binding.first, " (", binding.second.name,
+                          ") -> ",
+                          cel::FormatTypeName(binding.second.type.value_or(
+                              Type(TypeParamType("none")))));
+                    }));
 }
 
 void TypeInferenceContext::AssignabilityContext::
diff --git a/common/BUILD b/common/BUILD
index f7c897e57..93410306f 100644
--- a/common/BUILD
+++ b/common/BUILD
@@ -601,6 +601,17 @@ cc_library(
     ],
 )
 
+cc_library(
+    name = "format_type_name",
+    srcs = ["format_type_name.cc"],
+    hdrs = ["format_type_name.h"],
+    deps = [
+        ":type",
+        ":type_kind",
+        "@com_google_absl//absl/strings",
+    ],
+)
+
 cc_test(
     name = "type_test",
     srcs = glob([
@@ -623,6 +634,18 @@ cc_test(
     ],
 )
 
+cc_test(
+    name = "format_type_name_test",
+    srcs = ["format_type_name_test.cc"],
+    deps = [
+        ":format_type_name",
+        ":type",
+        "//internal:testing",
+        "@com_google_cel_spec//proto/cel/expr/conformance/proto2:test_all_types_cc_proto",
+        "@com_google_protobuf//:protobuf",
+    ],
+)
+
 cc_library(
     name = "value",
     srcs = glob(
diff --git a/checker/internal/format_type_name.cc b/common/format_type_name.cc
similarity index 97%
rename from checker/internal/format_type_name.cc
rename to common/format_type_name.cc
index 7cd17251f..4bd6c2e61 100644
--- a/checker/internal/format_type_name.cc
+++ b/common/format_type_name.cc
@@ -11,7 +11,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#include "checker/internal/format_type_name.h"
+#include "common/format_type_name.h"
 
 #include <string>
 #include <vector>
@@ -20,7 +20,7 @@
 #include "common/type.h"
 #include "common/type_kind.h"
 
-namespace cel::checker_internal {
+namespace cel {
 
 namespace {
 struct FormatImplRecord {
@@ -177,4 +177,4 @@ std::string FormatTypeName(const Type& type) {
   return out;
 }
 
-}  // namespace cel::checker_internal
+}  // namespace cel
diff --git a/checker/internal/format_type_name.h b/common/format_type_name.h
similarity index 74%
rename from checker/internal/format_type_name.h
rename to common/format_type_name.h
index c31e1c4d0..723ac20fd 100644
--- a/checker/internal/format_type_name.h
+++ b/common/format_type_name.h
@@ -12,19 +12,19 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#ifndef THIRD_PARTY_CEL_CPP_CHECKER_INTERNAL_FORMAT_TYPE_NAME_H_
-#define THIRD_PARTY_CEL_CPP_CHECKER_INTERNAL_FORMAT_TYPE_NAME_H_
+#ifndef THIRD_PARTY_CEL_CPP_COMMON_FORMAT_TYPE_NAME_H_
+#define THIRD_PARTY_CEL_CPP_COMMON_FORMAT_TYPE_NAME_H_
 
 #include <string>
 
 #include "common/type.h"
 
-namespace cel::checker_internal {
+namespace cel {
 
 // Format the type name for presentation in error messages. Matches the
 // formatting used in github.com/cel-spec.
 std::string FormatTypeName(const Type& type);
 
-}  // namespace cel::checker_internal
+}  // namespace cel
 
-#endif  // THIRD_PARTY_CEL_CPP_CHECKER_INTERNAL_FORMAT_TYPE_NAME_H_
+#endif  // THIRD_PARTY_CEL_CPP_COMMON_FORMAT_TYPE_NAME_H_
diff --git a/checker/internal/format_type_name_test.cc b/common/format_type_name_test.cc
similarity index 97%
rename from checker/internal/format_type_name_test.cc
rename to common/format_type_name_test.cc
index ff04e04d2..ca63f60b0 100644
--- a/checker/internal/format_type_name_test.cc
+++ b/common/format_type_name_test.cc
@@ -12,14 +12,14 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include "checker/internal/format_type_name.h"
+#include "common/format_type_name.h"
 
 #include "common/type.h"
 #include "internal/testing.h"
 #include "cel/expr/conformance/proto2/test_all_types.pb.h"
 #include "google/protobuf/arena.h"
 
-namespace cel::checker_internal {
+namespace cel {
 namespace {
 
 using ::cel::expr::conformance::proto2::GlobalEnum_descriptor;
@@ -115,4 +115,4 @@ TEST(FormatTypeNameTest, ArbitraryNesting) {
 #endif
 
 }  // namespace
-}  // namespace cel::checker_internal
+}  // namespace cel