diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/ImplementationBodyCodegen.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/ImplementationBodyCodegen.java
index 1c2148177d2..ce1ae36c3ed 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/ImplementationBodyCodegen.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/ImplementationBodyCodegen.java
@@ -59,10 +59,7 @@ import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmClassSignature;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodParameterKind;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodParameterSignature;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature;
-import org.jetbrains.kotlin.serialization.ClassData;
-import org.jetbrains.kotlin.serialization.DescriptorSerializer;
-import org.jetbrains.kotlin.serialization.ProtoBuf;
-import org.jetbrains.kotlin.serialization.StringTable;
+import org.jetbrains.kotlin.serialization.*;
 import org.jetbrains.kotlin.serialization.deserialization.NameResolver;
 import org.jetbrains.kotlin.serialization.jvm.BitEncoding;
 import org.jetbrains.kotlin.types.JetType;
@@ -253,7 +250,7 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
                 kind.toString()
         );
         AnnotationVisitor array = av.visitArray(JvmAnnotationNames.DATA_FIELD_NAME);
-        for (String string : BitEncoding.encodeBytes(data.toBytes())) {
+        for (String string : BitEncoding.encodeBytes(SerializationUtil.serializeClassData(data))) {
             array.visit(null, string);
         }
         array.visitEnd();
diff --git a/compiler/backend/src/org/jetbrains/kotlin/codegen/PackageCodegen.java b/compiler/backend/src/org/jetbrains/kotlin/codegen/PackageCodegen.java
index c77078bb3dd..4047017504e 100644
--- a/compiler/backend/src/org/jetbrains/kotlin/codegen/PackageCodegen.java
+++ b/compiler/backend/src/org/jetbrains/kotlin/codegen/PackageCodegen.java
@@ -49,10 +49,7 @@ import org.jetbrains.kotlin.resolve.MemberComparator;
 import org.jetbrains.kotlin.resolve.jvm.jvmSignature.JvmMethodSignature;
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter;
 import org.jetbrains.kotlin.resolve.scopes.JetScope;
-import org.jetbrains.kotlin.serialization.DescriptorSerializer;
-import org.jetbrains.kotlin.serialization.PackageData;
-import org.jetbrains.kotlin.serialization.ProtoBuf;
-import org.jetbrains.kotlin.serialization.StringTable;
+import org.jetbrains.kotlin.serialization.*;
 import org.jetbrains.kotlin.serialization.deserialization.NameResolver;
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedCallableMemberDescriptor;
 import org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedPropertyDescriptor;
@@ -286,7 +283,7 @@ public class PackageCodegen {
         AnnotationVisitor av = v.newAnnotation(asmDescByFqNameWithoutInnerClasses(JvmAnnotationNames.KOTLIN_PACKAGE), true);
         av.visit(JvmAnnotationNames.ABI_VERSION_FIELD_NAME, JvmAbi.VERSION);
         AnnotationVisitor array = av.visitArray(JvmAnnotationNames.DATA_FIELD_NAME);
-        for (String string : BitEncoding.encodeBytes(data.toBytes())) {
+        for (String string : BitEncoding.encodeBytes(SerializationUtil.serializePackageData(data))) {
             array.visit(null, string);
         }
         array.visitEnd();
diff --git a/compiler/builtins-serializer/src/BuiltInsSerializer.kt b/compiler/builtins-serializer/src/BuiltInsSerializer.kt
index 6181ec25f36..8502bf230c4 100644
--- a/compiler/builtins-serializer/src/BuiltInsSerializer.kt
+++ b/compiler/builtins-serializer/src/BuiltInsSerializer.kt
@@ -40,8 +40,8 @@ import org.jetbrains.kotlin.resolve.jvm.JvmAnalyzerFacade
 import org.jetbrains.kotlin.resolve.jvm.JvmPlatformParameters
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
 import org.jetbrains.kotlin.serialization.DescriptorSerializer
-import org.jetbrains.kotlin.serialization.NameSerializationUtil
 import org.jetbrains.kotlin.serialization.ProtoBuf
+import org.jetbrains.kotlin.serialization.SerializationUtil
 import org.jetbrains.kotlin.utils.recursePostOrder
 import java.io.ByteArrayOutputStream
 import java.io.File
@@ -136,7 +136,7 @@ public class BuiltInsSerializer(private val dependOnOldBuiltIns: Boolean) {
 
         val nameStream = ByteArrayOutputStream()
         val strings = serializer.getStringTable()
-        NameSerializationUtil.serializeStringTable(nameStream, strings.serializeSimpleNames(), strings.serializeQualifiedNames())
+        SerializationUtil.serializeStringTable(nameStream, strings.serializeSimpleNames(), strings.serializeQualifiedNames())
         write(destDir, BuiltInsSerializationUtil.getStringTableFilePath(fqName), nameStream)
     }
 
diff --git a/core/serialization/src/org/jetbrains/kotlin/serialization/ClassData.java b/core/serialization/src/org/jetbrains/kotlin/serialization/ClassData.java
index 2f75faefd43..4b1cb45d891 100644
--- a/core/serialization/src/org/jetbrains/kotlin/serialization/ClassData.java
+++ b/core/serialization/src/org/jetbrains/kotlin/serialization/ClassData.java
@@ -22,7 +22,6 @@ import org.jetbrains.kotlin.serialization.deserialization.NameResolver;
 import org.jetbrains.kotlin.utils.UtilsPackage;
 
 import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 
 public final class ClassData {
@@ -56,17 +55,4 @@ public final class ClassData {
     public ProtoBuf.Class getClassProto() {
         return classProto;
     }
-
-    @NotNull
-    public byte[] toBytes() {
-        try {
-            ByteArrayOutputStream result = new ByteArrayOutputStream();
-            NameSerializationUtil.serializeNameResolver(result, nameResolver);
-            classProto.writeTo(result);
-            return result.toByteArray();
-        }
-        catch (IOException e) {
-            throw UtilsPackage.rethrow(e);
-        }
-    }
 }
diff --git a/core/serialization/src/org/jetbrains/kotlin/serialization/PackageData.java b/core/serialization/src/org/jetbrains/kotlin/serialization/PackageData.java
index fbceee39d3c..2d1cf45a97c 100644
--- a/core/serialization/src/org/jetbrains/kotlin/serialization/PackageData.java
+++ b/core/serialization/src/org/jetbrains/kotlin/serialization/PackageData.java
@@ -22,7 +22,6 @@ import org.jetbrains.kotlin.serialization.deserialization.NameResolver;
 import org.jetbrains.kotlin.utils.UtilsPackage;
 
 import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 
 public final class PackageData {
@@ -56,17 +55,4 @@ public final class PackageData {
     public ProtoBuf.Package getPackageProto() {
         return packageProto;
     }
-
-    @NotNull
-    public byte[] toBytes() {
-        try {
-            ByteArrayOutputStream result = new ByteArrayOutputStream();
-            NameSerializationUtil.serializeNameResolver(result, nameResolver);
-            packageProto.writeTo(result);
-            return result.toByteArray();
-        }
-        catch (IOException e) {
-            throw UtilsPackage.rethrow(e);
-        }
-    }
 }
diff --git a/core/serialization/src/org/jetbrains/kotlin/serialization/NameSerializationUtil.java b/core/serialization/src/org/jetbrains/kotlin/serialization/SerializationUtil.java
similarity index 55%
rename from core/serialization/src/org/jetbrains/kotlin/serialization/NameSerializationUtil.java
rename to core/serialization/src/org/jetbrains/kotlin/serialization/SerializationUtil.java
index ce8a02799ef..ec205daca12 100644
--- a/core/serialization/src/org/jetbrains/kotlin/serialization/NameSerializationUtil.java
+++ b/core/serialization/src/org/jetbrains/kotlin/serialization/SerializationUtil.java
@@ -20,14 +20,41 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.serialization.deserialization.NameResolver;
 import org.jetbrains.kotlin.utils.UtilsPackage;
 
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.OutputStream;
 
-public class NameSerializationUtil {
-    private NameSerializationUtil() {
+public class SerializationUtil {
+    private SerializationUtil() {
     }
 
-    public static void serializeNameResolver(@NotNull OutputStream out, @NotNull NameResolver nameResolver) {
+    @NotNull
+    public static byte[] serializeClassData(@NotNull ClassData classData) {
+        try {
+            ByteArrayOutputStream result = new ByteArrayOutputStream();
+            serializeNameResolver(result, classData.getNameResolver());
+            classData.getClassProto().writeTo(result);
+            return result.toByteArray();
+        }
+        catch (IOException e) {
+            throw UtilsPackage.rethrow(e);
+        }
+    }
+
+    @NotNull
+    public static byte[] serializePackageData(@NotNull PackageData packageData) {
+        try {
+            ByteArrayOutputStream result = new ByteArrayOutputStream();
+            serializeNameResolver(result, packageData.getNameResolver());
+            packageData.getPackageProto().writeTo(result);
+            return result.toByteArray();
+        }
+        catch (IOException e) {
+            throw UtilsPackage.rethrow(e);
+        }
+    }
+
+    private static void serializeNameResolver(@NotNull OutputStream out, @NotNull NameResolver nameResolver) {
         serializeStringTable(out, nameResolver.getStringTable(), nameResolver.getQualifiedNameTable());
     }
 
diff --git a/js/js.serializer/src/org/jetbrains/kotlin/utils/serializer/KotlinJavaScriptSerializer.kt b/js/js.serializer/src/org/jetbrains/kotlin/utils/serializer/KotlinJavaScriptSerializer.kt
index a0559d633e7..45dc3f52da8 100644
--- a/js/js.serializer/src/org/jetbrains/kotlin/utils/serializer/KotlinJavaScriptSerializer.kt
+++ b/js/js.serializer/src/org/jetbrains/kotlin/utils/serializer/KotlinJavaScriptSerializer.kt
@@ -25,8 +25,8 @@ import org.jetbrains.kotlin.resolve.DescriptorUtils
 import org.jetbrains.kotlin.resolve.descriptorUtil.classId
 import org.jetbrains.kotlin.resolve.scopes.DescriptorKindFilter
 import org.jetbrains.kotlin.serialization.DescriptorSerializer
-import org.jetbrains.kotlin.serialization.NameSerializationUtil
 import org.jetbrains.kotlin.serialization.ProtoBuf
+import org.jetbrains.kotlin.serialization.SerializationUtil
 import org.jetbrains.kotlin.serialization.builtins.BuiltInsSerializerExtension
 import org.jetbrains.kotlin.serialization.js.KotlinJavascriptSerializationUtil
 import org.jetbrains.kotlin.utils.KotlinJavascriptMetadataUtils
@@ -75,7 +75,7 @@ public class KotlinJavaScriptSerializer() {
 
         val nameStream = ByteArrayOutputStream()
         val strings = serializer.getStringTable()
-        NameSerializationUtil.serializeStringTable(nameStream, strings.serializeSimpleNames(), strings.serializeQualifiedNames())
+        SerializationUtil.serializeStringTable(nameStream, strings.serializeSimpleNames(), strings.serializeQualifiedNames())
         writeFun(BuiltInsSerializationUtil.getStringTableFilePath(fqName), nameStream)
     }