diff --git a/acl/grpc/types_frostfs.pb.go b/acl/grpc/types_frostfs.pb.go
index 2b116bd..b055167 100644
--- a/acl/grpc/types_frostfs.pb.go
+++ b/acl/grpc/types_frostfs.pb.go
@@ -356,12 +356,22 @@ func (x *EACLRecord_Filter) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"headerType\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.HeaderType))
+		v := int32(x.HeaderType)
+		if vv, ok := HeaderType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"matchType\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.MatchType))
+		v := int32(x.MatchType)
+		if vv, ok := MatchType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"key\":"
@@ -570,7 +580,12 @@ func (x *EACLRecord_Target) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"role\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.Role))
+		v := int32(x.Role)
+		if vv, ok := Role_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"keys\":"
@@ -812,12 +827,22 @@ func (x *EACLRecord) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"operation\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.Operation))
+		v := int32(x.Operation)
+		if vv, ok := Operation_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"action\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.Action))
+		v := int32(x.Action)
+		if vv, ok := Action_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"filters\":"
diff --git a/ape/grpc/types_frostfs.pb.go b/ape/grpc/types_frostfs.pb.go
index 216415b..e19d9f6 100644
--- a/ape/grpc/types_frostfs.pb.go
+++ b/ape/grpc/types_frostfs.pb.go
@@ -159,7 +159,12 @@ func (x *ChainTarget) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"type\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.Type))
+		v := int32(x.Type)
+		if vv, ok := TargetType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"name\":"
diff --git a/netmap/grpc/types_frostfs.pb.go b/netmap/grpc/types_frostfs.pb.go
index e7597ea..43af103 100644
--- a/netmap/grpc/types_frostfs.pb.go
+++ b/netmap/grpc/types_frostfs.pb.go
@@ -288,7 +288,12 @@ func (x *Filter) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"op\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.Op))
+		v := int32(x.Op)
+		if vv, ok := Operation_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"value\":"
@@ -572,7 +577,12 @@ func (x *Selector) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"clause\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.Clause))
+		v := int32(x.Clause)
+		if vv, ok := Clause_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"attribute\":"
@@ -1627,7 +1637,12 @@ func (x *NodeInfo) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"state\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.State))
+		v := int32(x.State)
+		if vv, ok := NodeInfo_State_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	out.RawByte('}')
 }
diff --git a/object/grpc/service_frostfs.pb.go b/object/grpc/service_frostfs.pb.go
index dea1b5b..188d032 100644
--- a/object/grpc/service_frostfs.pb.go
+++ b/object/grpc/service_frostfs.pb.go
@@ -4117,7 +4117,12 @@ func (x *SearchRequest_Body_Filter) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"matchType\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.MatchType))
+		v := int32(x.MatchType)
+		if vv, ok := MatchType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"key\":"
@@ -6246,7 +6251,12 @@ func (x *GetRangeHashRequest_Body) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"type\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.Type))
+		v := int32(x.Type)
+		if vv, ok := grpc.ChecksumType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	out.RawByte('}')
 }
@@ -6659,7 +6669,12 @@ func (x *GetRangeHashResponse_Body) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"type\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.Type))
+		v := int32(x.Type)
+		if vv, ok := grpc.ChecksumType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"hashList\":"
diff --git a/object/grpc/types_frostfs.pb.go b/object/grpc/types_frostfs.pb.go
index 4233417..9fc2769 100644
--- a/object/grpc/types_frostfs.pb.go
+++ b/object/grpc/types_frostfs.pb.go
@@ -323,7 +323,12 @@ func (x *ShortHeader) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"objectType\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.ObjectType))
+		v := int32(x.ObjectType)
+		if vv, ok := ObjectType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"payloadLength\":"
@@ -1659,7 +1664,12 @@ func (x *Header) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"objectType\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.ObjectType))
+		v := int32(x.ObjectType)
+		if vv, ok := ObjectType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"homomorphicHash\":"
diff --git a/refs/grpc/types_frostfs.pb.go b/refs/grpc/types_frostfs.pb.go
index 35febe9..5f35eba 100644
--- a/refs/grpc/types_frostfs.pb.go
+++ b/refs/grpc/types_frostfs.pb.go
@@ -933,7 +933,12 @@ func (x *Signature) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"scheme\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.Scheme))
+		v := int32(x.Scheme)
+		if vv, ok := SignatureScheme_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	out.RawByte('}')
 }
@@ -1270,7 +1275,12 @@ func (x *Checksum) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"type\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.Type))
+		v := int32(x.Type)
+		if vv, ok := ChecksumType_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"sum\":"
diff --git a/session/grpc/types_frostfs.pb.go b/session/grpc/types_frostfs.pb.go
index 41ff5d9..c92ab28 100644
--- a/session/grpc/types_frostfs.pb.go
+++ b/session/grpc/types_frostfs.pb.go
@@ -362,7 +362,12 @@ func (x *ObjectSessionContext) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"verb\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.Verb))
+		v := int32(x.Verb)
+		if vv, ok := ObjectSessionContext_Verb_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"target\":"
@@ -600,7 +605,12 @@ func (x *ContainerSessionContext) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"verb\":"
 		out.RawString(prefix[1:])
-		out.Int32(int32(x.Verb))
+		v := int32(x.Verb)
+		if vv, ok := ContainerSessionContext_Verb_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	{
 		const prefix string = ",\"wildcard\":"
diff --git a/util/proto/test/custom/test_frostfs.pb.go b/util/proto/test/custom/test_frostfs.pb.go
index 97efa51..005d6d1 100644
--- a/util/proto/test/custom/test_frostfs.pb.go
+++ b/util/proto/test/custom/test_frostfs.pb.go
@@ -614,7 +614,12 @@ func (x *Primitives) MarshalEasyJSON(out *jwriter.Writer) {
 	{
 		const prefix string = ",\"fieldH\":"
 		out.RawString(prefix)
-		out.Int32(int32(x.FieldH))
+		v := int32(x.FieldH)
+		if vv, ok := Primitives_SomeEnum_name[v]; ok {
+			out.String(vv)
+		} else {
+			out.Int32(v)
+		}
 	}
 	switch xx := x.FieldM.(type) {
 	case *Primitives_FieldMa:
diff --git a/util/protogen/internalgengo/json.go b/util/protogen/internalgengo/json.go
index f7cd284..95a06d5 100644
--- a/util/protogen/internalgengo/json.go
+++ b/util/protogen/internalgengo/json.go
@@ -195,7 +195,13 @@ func emitJSONFieldWrite(g *protogen.GeneratedFile, f *protogen.Field, name strin
 	case protoreflect.BoolKind:
 		template = "out.Bool(%s)"
 	case protoreflect.EnumKind:
-		template = "out.Int32(int32(%s))"
+		enumType := fieldType(g, f).String()
+		template = `v := int32(%s)
+			if vv, ok := ` + enumType + `_name[v]; ok {
+				out.String(vv)
+			} else {
+				out.Int32(v)
+			}`
 	case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind:
 		template = "out.Int32(%s)"
 	case protoreflect.Uint32Kind, protoreflect.Fixed32Kind: