diff --git a/src/coders/json.cpp b/src/coders/json.cpp
index ea2d33c9..a15a40a2 100644
--- a/src/coders/json.cpp
+++ b/src/coders/json.cpp
@@ -63,6 +63,10 @@ void stringifyValue(
         stringifyObj(map->get(), ss, indent, indentstr, nice);
     } else if (auto listptr = std::get_if<List_sptr>(&value)) {
         stringifyArr(listptr->get(), ss, indent, indentstr, nice);
+    } else if (auto bytesptr = std::get_if<ByteBuffer_sptr>(&value)) {
+        auto bytes = bytesptr->get();
+        ss << "\"" << util::base64_encode(bytes->data(), bytes->size());
+        ss << "\"";
     } else if (auto flag = std::get_if<bool>(&value)) {
         ss << (*flag ? "true" : "false");
     } else if (auto num = std::get_if<number_t>(&value)) {
diff --git a/src/data/dynamic.cpp b/src/data/dynamic.cpp
index f49a0aee..42100735 100644
--- a/src/data/dynamic.cpp
+++ b/src/data/dynamic.cpp
@@ -249,6 +249,12 @@ List_sptr Map::list(const std::string& key) const {
     return nullptr;
 }
 
+ByteBuffer_sptr Map::bytes(const std::string& key) const {
+    auto found = values.find(key);
+    if (found != values.end()) return std::get<ByteBuffer_sptr>(found->second);
+    return nullptr;
+}
+
 void Map::flag(const std::string& key, bool& dst) const {
     dst = get(key, dst);
 }
diff --git a/src/data/dynamic.hpp b/src/data/dynamic.hpp
index 838e5fa8..ed7a0786 100644
--- a/src/data/dynamic.hpp
+++ b/src/data/dynamic.hpp
@@ -15,11 +15,11 @@ namespace dynamic {
         none = 0,
         map,
         list,
+        bytes,
         string,
         number,
         boolean,
-        integer,
-        bytes
+        integer
     };
 
     const std::string& type_name(const Value& value);
@@ -127,6 +127,7 @@ namespace dynamic {
         void num(const std::string& key, double& dst) const;
         Map_sptr map(const std::string& key) const;
         List_sptr list(const std::string& key) const;
+        ByteBuffer_sptr bytes(const std::string& key) const;
         void flag(const std::string& key, bool& dst) const;
 
         Map& put(std::string key, std::unique_ptr<Map> value) {
@@ -156,6 +157,13 @@ namespace dynamic {
         Map& put(std::string key, bool value) {
             return put(key, Value(static_cast<bool>(value)));
         }
+        Map& put(const std::string& key, const ByteBuffer* bytes) {
+            return put(key, std::make_unique<ByteBuffer>(
+                bytes->data(), bytes->size()));
+        }
+        Map& put(std::string key, const ubyte* bytes, size_t size) {
+            return put(key, std::make_unique<ByteBuffer>(bytes, size));
+        }
         Map& put(std::string key, const char* value) {
             return put(key, Value(value));
         }
diff --git a/src/util/Buffer.hpp b/src/util/Buffer.hpp
index 4787d2ed..68e185c6 100644
--- a/src/util/Buffer.hpp
+++ b/src/util/Buffer.hpp
@@ -48,5 +48,9 @@ namespace util {
         Buffer clone() const {
             return Buffer(ptr.get(), length);
         }
+
+        void resizeFast(size_t size) {
+            length = size;
+        }
     };
 }
diff --git a/src/util/stringutil.cpp b/src/util/stringutil.cpp
index 97ca4786..4452301b 100644
--- a/src/util/stringutil.cpp
+++ b/src/util/stringutil.cpp
@@ -319,8 +319,8 @@ std::string util::mangleid(uint64_t value) {
     return ss.str();
 }
 
-std::vector<ubyte> util::base64_decode(const char* str, size_t size) {
-    std::vector<ubyte> bytes((size / 4) * 3);
+util::Buffer<ubyte> util::base64_decode(const char* str, size_t size) {
+    util::Buffer<ubyte> bytes((size / 4) * 3);
     ubyte* dst = bytes.data();
     for (size_t i = 0; i < size;) {
         ubyte a = base64_decode_char(ubyte(str[i++]));
@@ -335,12 +335,12 @@ std::vector<ubyte> util::base64_decode(const char* str, size_t size) {
         size_t outsize = bytes.size();
         if (str[size - 1] == '=') outsize--;
         if (str[size - 2] == '=') outsize--;
-        bytes.resize(outsize);
+        bytes.resizeFast(outsize);
     }
     return bytes;
 }
 
-std::vector<ubyte> util::base64_decode(const std::string& str) {
+util::Buffer<ubyte> util::base64_decode(const std::string& str) {
     return base64_decode(str.c_str(), str.size());
 }
 
diff --git a/src/util/stringutil.hpp b/src/util/stringutil.hpp
index 38e7cf89..21d58e5e 100644
--- a/src/util/stringutil.hpp
+++ b/src/util/stringutil.hpp
@@ -4,6 +4,7 @@
 #include <vector>
 
 #include "typedefs.hpp"
+#include "util/Buffer.hpp"
 
 namespace util {
     /// @brief Function used for string serialization in text formats
@@ -56,8 +57,8 @@ namespace util {
     std::wstring to_wstring(double x, int precision);
 
     std::string base64_encode(const ubyte* data, size_t size);
-    std::vector<ubyte> base64_decode(const char* str, size_t size);
-    std::vector<ubyte> base64_decode(const std::string& str);
+    util::Buffer<ubyte> base64_decode(const char* str, size_t size);
+    util::Buffer<ubyte> base64_decode(const std::string& str);
 
     std::string mangleid(uint64_t value);
 
diff --git a/test/coders/json.cpp b/test/coders/json.cpp
new file mode 100644
index 00000000..7212a087
--- /dev/null
+++ b/test/coders/json.cpp
@@ -0,0 +1,41 @@
+#include <gtest/gtest.h>
+
+#include "coders/json.hpp"
+#include "util/stringutil.hpp"
+
+#include <iostream>
+
+TEST(JSON, EncodeDecode) {
+    const std::string name = "JSON-encoder";
+    const int bytesSize = 20;
+    const int year = 2019;
+    const float score = 3.141592;
+    dynamic::ByteBuffer srcBytes(bytesSize);
+    for (int i = 0; i < bytesSize; i ++) {
+        srcBytes[i] = rand();
+    }
+
+    std::string text;
+    {
+        dynamic::Map map;
+        map.put("name", name);
+        map.put("year", year);
+        map.put("score", score);
+        map.put("data", &srcBytes);
+
+        text = json::stringify(&map, false, "");
+    }
+    {
+        auto map = json::parse(text);
+        EXPECT_EQ(map->get<std::string>("name"), name);
+        EXPECT_EQ(map->get<integer_t>("year"), year);
+        EXPECT_FLOAT_EQ(map->get<number_t>("score"), score);
+        auto b64string = map->get<std::string>("data");
+
+        auto bytes = util::base64_decode(b64string);
+        EXPECT_EQ(bytes.size(), bytesSize);
+        for (int i = 0; i < bytesSize; i++) {
+            EXPECT_EQ(bytes[i], srcBytes[i]);
+        }
+    }
+}