diff --git a/src/main/java/io/vertx/core/json/Json.java b/src/main/java/io/vertx/core/json/Json.java
index a8b0997cd..90b398b6b 100644
--- a/src/main/java/io/vertx/core/json/Json.java
+++ b/src/main/java/io/vertx/core/json/Json.java
@@ -11,50 +11,14 @@
 
 package io.vertx.core.json;
 
-import com.fasterxml.jackson.core.JsonParser;
-import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.SerializationFeature;
-import com.fasterxml.jackson.databind.module.SimpleModule;
 import io.vertx.core.buffer.Buffer;
-import io.vertx.core.json.impl.JacksonCodec;
 import io.vertx.core.spi.json.JsonCodec;
 
-import java.time.Instant;
-
 /**
  * @author <a href="http://tfox.org">Tim Fox</a>
  */
 public class Json {
 
-  public static ObjectMapper mapper = new ObjectMapper();
-  public static ObjectMapper prettyMapper = new ObjectMapper();
-
-  static {
-    initialize();
-  }
-
-  private static void initialize() {
-    // Non-standard JSON but we allow C style comments in our JSON
-    mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
-
-    prettyMapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
-    prettyMapper.configure(SerializationFeature.INDENT_OUTPUT, true);
-
-    SimpleModule module = new SimpleModule();
-    // custom types
-    module.addSerializer(JsonObject.class, new JsonObjectSerializer());
-    module.addSerializer(JsonArray.class, new JsonArraySerializer());
-    // he have 2 extensions: RFC-7493
-    module.addSerializer(Instant.class, new InstantSerializer());
-    module.addDeserializer(Instant.class, new InstantDeserializer());
-    module.addSerializer(byte[].class, new ByteArraySerializer());
-    module.addDeserializer(byte[].class, new ByteArrayDeserializer());
-
-    mapper.registerModule(module);
-    prettyMapper.registerModule(module);
-  }
-
   /**
    * Encode a POJO to JSON using the underlying Jackson mapper.
    *
@@ -112,18 +76,6 @@ public class Json {
     return decodeValue(str, Object.class);
   }
 
-  /**
-   * Decode a given JSON string to a POJO of the given type.
-   * @param str the JSON string.
-   * @param type the type to map to.
-   * @param <T> the generic type.
-   * @return an instance of T
-   * @throws DecodeException when there is a parsing or invalid mapping.
-   */
-  public static <T> T decodeValue(String str, TypeReference<T> type) throws DecodeException {
-    return JacksonCodec.fromString(str, type);
-  }
-
   /**
    * Decode a given JSON buffer.
    *
@@ -136,18 +88,6 @@ public class Json {
     return decodeValue(buf, Object.class);
   }
 
-  /**
-   * Decode a given JSON buffer to a POJO of the given class type.
-   * @param buf the JSON buffer.
-   * @param type the type to map to.
-   * @param <T> the generic type.
-   * @return an instance of T
-   * @throws DecodeException when there is a parsing or invalid mapping.
-   */
-  public static <T> T decodeValue(Buffer buf, TypeReference<T> type) throws DecodeException {
-    return JacksonCodec.fromBuffer(buf, type);
-  }
-
   /**
    * Decode a given JSON buffer to a POJO of the given class type.
    * @param buf the JSON buffer.
diff --git a/src/main/java/io/vertx/core/json/ByteArrayDeserializer.java b/src/main/java/io/vertx/core/json/impl/ByteArrayDeserializer.java
similarity index 97%
rename from src/main/java/io/vertx/core/json/ByteArrayDeserializer.java
rename to src/main/java/io/vertx/core/json/impl/ByteArrayDeserializer.java
index 95582f51b..4554285f8 100644
--- a/src/main/java/io/vertx/core/json/ByteArrayDeserializer.java
+++ b/src/main/java/io/vertx/core/json/impl/ByteArrayDeserializer.java
@@ -8,7 +8,7 @@
  *
  * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
  */
-package io.vertx.core.json;
+package io.vertx.core.json.impl;
 
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonProcessingException;
diff --git a/src/main/java/io/vertx/core/json/ByteArraySerializer.java b/src/main/java/io/vertx/core/json/impl/ByteArraySerializer.java
similarity index 96%
rename from src/main/java/io/vertx/core/json/ByteArraySerializer.java
rename to src/main/java/io/vertx/core/json/impl/ByteArraySerializer.java
index ce32735f9..4a5b21f43 100644
--- a/src/main/java/io/vertx/core/json/ByteArraySerializer.java
+++ b/src/main/java/io/vertx/core/json/impl/ByteArraySerializer.java
@@ -8,7 +8,7 @@
  *
  * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
  */
-package io.vertx.core.json;
+package io.vertx.core.json.impl;
 
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.JsonSerializer;
diff --git a/src/main/java/io/vertx/core/json/InstantDeserializer.java b/src/main/java/io/vertx/core/json/impl/InstantDeserializer.java
similarity index 97%
rename from src/main/java/io/vertx/core/json/InstantDeserializer.java
rename to src/main/java/io/vertx/core/json/impl/InstantDeserializer.java
index b349568fd..0931e3c97 100644
--- a/src/main/java/io/vertx/core/json/InstantDeserializer.java
+++ b/src/main/java/io/vertx/core/json/impl/InstantDeserializer.java
@@ -8,7 +8,7 @@
  *
  * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
  */
-package io.vertx.core.json;
+package io.vertx.core.json.impl;
 
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.JsonProcessingException;
diff --git a/src/main/java/io/vertx/core/json/InstantSerializer.java b/src/main/java/io/vertx/core/json/impl/InstantSerializer.java
similarity index 96%
rename from src/main/java/io/vertx/core/json/InstantSerializer.java
rename to src/main/java/io/vertx/core/json/impl/InstantSerializer.java
index 75e93040b..5cce8e4a5 100644
--- a/src/main/java/io/vertx/core/json/InstantSerializer.java
+++ b/src/main/java/io/vertx/core/json/impl/InstantSerializer.java
@@ -8,7 +8,7 @@
  *
  * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
  */
-package io.vertx.core.json;
+package io.vertx.core.json.impl;
 
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.JsonSerializer;
diff --git a/src/main/java/io/vertx/core/json/impl/JacksonCodec.java b/src/main/java/io/vertx/core/json/impl/JacksonCodec.java
index c24c75174..e83998200 100644
--- a/src/main/java/io/vertx/core/json/impl/JacksonCodec.java
+++ b/src/main/java/io/vertx/core/json/impl/JacksonCodec.java
@@ -14,17 +14,19 @@ package io.vertx.core.json.impl;
 import com.fasterxml.jackson.core.JsonParser;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.databind.module.SimpleModule;
 import io.netty.buffer.ByteBufInputStream;
 import io.vertx.core.buffer.Buffer;
 import io.vertx.core.json.DecodeException;
 import io.vertx.core.json.EncodeException;
-import io.vertx.core.json.Json;
 import io.vertx.core.json.JsonArray;
 import io.vertx.core.json.JsonObject;
 import io.vertx.core.spi.json.JsonCodec;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.time.Instant;
 import java.util.List;
 import java.util.Map;
 
@@ -33,9 +35,37 @@ import java.util.Map;
  */
 public class JacksonCodec implements JsonCodec {
 
+  public static ObjectMapper mapper = new ObjectMapper();
+  public static ObjectMapper prettyMapper = new ObjectMapper();
+
+  static {
+    initialize();
+  }
+
+  private static void initialize() {
+    // Non-standard JSON but we allow C style comments in our JSON
+    mapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
+
+    prettyMapper.configure(JsonParser.Feature.ALLOW_COMMENTS, true);
+    prettyMapper.configure(SerializationFeature.INDENT_OUTPUT, true);
+
+    SimpleModule module = new SimpleModule();
+    // custom types
+    module.addSerializer(JsonObject.class, new JsonObjectSerializer());
+    module.addSerializer(JsonArray.class, new JsonArraySerializer());
+    // he have 2 extensions: RFC-7493
+    module.addSerializer(Instant.class, new InstantSerializer());
+    module.addDeserializer(Instant.class, new InstantDeserializer());
+    module.addSerializer(byte[].class, new ByteArraySerializer());
+    module.addDeserializer(byte[].class, new ByteArrayDeserializer());
+
+    mapper.registerModule(module);
+    prettyMapper.registerModule(module);
+  }
+
   @Override
   public <T> T fromValue(Object json, Class<T> clazz) {
-    T value = Json.mapper.convertValue(json, clazz);
+    T value = JacksonCodec.mapper.convertValue(json, clazz);
     if (clazz == Object.class) {
       value = (T) adapt(value);
     }
@@ -43,7 +73,7 @@ public class JacksonCodec implements JsonCodec {
   }
 
   public static <T> T fromValue(Object json, TypeReference<T> type) {
-    T value = Json.mapper.convertValue(json, type);
+    T value = JacksonCodec.mapper.convertValue(json, type);
     if (type.getType() == Object.class) {
       value = (T) adapt(value);
     }
@@ -70,7 +100,7 @@ public class JacksonCodec implements JsonCodec {
 
   private static JsonParser createParser(Buffer buf) {
     try {
-      return Json.mapper.getFactory().createParser((InputStream) new ByteBufInputStream(buf.getByteBuf()));
+      return JacksonCodec.mapper.getFactory().createParser((InputStream) new ByteBufInputStream(buf.getByteBuf()));
     } catch (IOException e) {
       throw new DecodeException("Failed to decode:" + e.getMessage(), e);
     }
@@ -78,7 +108,7 @@ public class JacksonCodec implements JsonCodec {
 
   private static JsonParser createParser(String str) {
     try {
-      return Json.mapper.getFactory().createParser(str);
+      return JacksonCodec.mapper.getFactory().createParser(str);
     } catch (IOException e) {
       throw new DecodeException("Failed to decode:" + e.getMessage(), e);
     }
@@ -87,7 +117,7 @@ public class JacksonCodec implements JsonCodec {
   private static <T> T fromParser(JsonParser parser, Class<T> type) throws DecodeException {
     T value;
     try {
-      value = Json.mapper.readValue(parser, type);
+      value = JacksonCodec.mapper.readValue(parser, type);
     } catch (Exception e) {
       throw new DecodeException("Failed to decode:" + e.getMessage(), e);
     } finally {
@@ -102,7 +132,7 @@ public class JacksonCodec implements JsonCodec {
   private static <T> T fromParser(JsonParser parser, TypeReference<T> type) throws DecodeException {
     T value;
     try {
-      value = Json.mapper.readValue(parser, type);
+      value = JacksonCodec.mapper.readValue(parser, type);
     } catch (Exception e) {
       throw new DecodeException("Failed to decode:" + e.getMessage(), e);
     } finally {
@@ -141,7 +171,7 @@ public class JacksonCodec implements JsonCodec {
   @Override
   public String toString(Object object, boolean pretty) throws EncodeException {
     try {
-      ObjectMapper mapper = pretty ? Json.prettyMapper : Json.mapper;
+      ObjectMapper mapper = pretty ? JacksonCodec.prettyMapper : JacksonCodec.mapper;
       return mapper.writeValueAsString(object);
     } catch (Exception e) {
       throw new EncodeException("Failed to encode as JSON: " + e.getMessage());
@@ -151,7 +181,7 @@ public class JacksonCodec implements JsonCodec {
   @Override
   public Buffer toBuffer(Object object, boolean pretty) throws EncodeException {
     try {
-      ObjectMapper mapper = pretty ? Json.prettyMapper : Json.mapper;
+      ObjectMapper mapper = pretty ? JacksonCodec.prettyMapper : JacksonCodec.mapper;
       return Buffer.buffer(mapper.writeValueAsBytes(object));
     } catch (Exception e) {
       throw new EncodeException("Failed to encode as JSON: " + e.getMessage());
diff --git a/src/main/java/io/vertx/core/json/JsonArraySerializer.java b/src/main/java/io/vertx/core/json/impl/JsonArraySerializer.java
similarity index 85%
rename from src/main/java/io/vertx/core/json/JsonArraySerializer.java
rename to src/main/java/io/vertx/core/json/impl/JsonArraySerializer.java
index 78dcf38c3..64b229ce7 100644
--- a/src/main/java/io/vertx/core/json/JsonArraySerializer.java
+++ b/src/main/java/io/vertx/core/json/impl/JsonArraySerializer.java
@@ -1,8 +1,9 @@
-package io.vertx.core.json;
+package io.vertx.core.json.impl;
 
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.SerializerProvider;
+import io.vertx.core.json.JsonArray;
 
 import java.io.IOException;
 
diff --git a/src/main/java/io/vertx/core/json/JsonObjectSerializer.java b/src/main/java/io/vertx/core/json/impl/JsonObjectSerializer.java
similarity index 92%
rename from src/main/java/io/vertx/core/json/JsonObjectSerializer.java
rename to src/main/java/io/vertx/core/json/impl/JsonObjectSerializer.java
index a258a43eb..6bc28b6cf 100644
--- a/src/main/java/io/vertx/core/json/JsonObjectSerializer.java
+++ b/src/main/java/io/vertx/core/json/impl/JsonObjectSerializer.java
@@ -8,11 +8,12 @@
  *
  * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
  */
-package io.vertx.core.json;
+package io.vertx.core.json.impl;
 
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.SerializerProvider;
+import io.vertx.core.json.JsonObject;
 
 import java.io.IOException;
 
diff --git a/src/main/java/io/vertx/core/parsetools/impl/JsonParserImpl.java b/src/main/java/io/vertx/core/parsetools/impl/JsonParserImpl.java
index c61a6e5b2..39819e19d 100644
--- a/src/main/java/io/vertx/core/parsetools/impl/JsonParserImpl.java
+++ b/src/main/java/io/vertx/core/parsetools/impl/JsonParserImpl.java
@@ -22,9 +22,9 @@ import io.vertx.core.VertxException;
 import io.vertx.core.buffer.Buffer;
 import io.vertx.core.impl.Arguments;
 import io.vertx.core.json.DecodeException;
-import io.vertx.core.json.Json;
 import io.vertx.core.json.JsonArray;
 import io.vertx.core.json.JsonObject;
+import io.vertx.core.json.impl.JacksonCodec;
 import io.vertx.core.parsetools.JsonEvent;
 import io.vertx.core.parsetools.JsonEventType;
 import io.vertx.core.parsetools.JsonParser;
@@ -445,7 +445,7 @@ public class JsonParserImpl implements JsonParser {
 
     <T> T convert(Class<T> type) {
       try {
-        return Json.mapper.readValue(buffer, type);
+        return JacksonCodec.mapper.readValue(buffer, type);
       } catch (Exception e) {
         throw new DecodeException(e.getMessage(), e);
       }
diff --git a/src/test/benchmarks/io/vertx/benchmarks/JsonDecodeBenchmark.java b/src/test/benchmarks/io/vertx/benchmarks/JsonDecodeBenchmark.java
index c472c3d8d..d84ba557c 100644
--- a/src/test/benchmarks/io/vertx/benchmarks/JsonDecodeBenchmark.java
+++ b/src/test/benchmarks/io/vertx/benchmarks/JsonDecodeBenchmark.java
@@ -13,8 +13,8 @@ package io.vertx.benchmarks;
 
 import io.netty.util.CharsetUtil;
 import io.vertx.core.buffer.Buffer;
-import io.vertx.core.json.Json;
 import io.vertx.core.json.JsonObject;
+import io.vertx.core.json.impl.JacksonCodec;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.CompilerControl;
 import org.openjdk.jmh.annotations.Scope;
@@ -47,7 +47,7 @@ public class JsonDecodeBenchmark extends BenchmarkBase {
 
   private Buffer loadJsonAsBuffer(URL url) {
     try {
-      Buffer encoded = new JsonObject(Json.mapper.readValue(url, Map.class)).toBuffer();
+      Buffer encoded = new JsonObject(JacksonCodec.mapper.readValue(url, Map.class)).toBuffer();
       return Buffer.buffer().appendInt(encoded.length()).appendBuffer(encoded);
     } catch (IOException e) {
       throw new RuntimeException(e);
diff --git a/src/test/benchmarks/io/vertx/benchmarks/JsonEncodeBenchmark.java b/src/test/benchmarks/io/vertx/benchmarks/JsonEncodeBenchmark.java
index a442c5787..90637af87 100644
--- a/src/test/benchmarks/io/vertx/benchmarks/JsonEncodeBenchmark.java
+++ b/src/test/benchmarks/io/vertx/benchmarks/JsonEncodeBenchmark.java
@@ -13,8 +13,8 @@ package io.vertx.benchmarks;
 
 import io.netty.util.CharsetUtil;
 import io.vertx.core.buffer.Buffer;
-import io.vertx.core.json.Json;
 import io.vertx.core.json.JsonObject;
+import io.vertx.core.json.impl.JacksonCodec;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.CompilerControl;
 import org.openjdk.jmh.annotations.Scope;
@@ -47,7 +47,7 @@ public class JsonEncodeBenchmark extends BenchmarkBase {
 
   private JsonObject loadJson(URL url) {
     try {
-      return new JsonObject(Json.mapper.readValue(url, Map.class));
+      return new JsonObject(JacksonCodec.mapper.readValue(url, Map.class));
     } catch (IOException e) {
       throw new RuntimeException(e);
     }
diff --git a/src/test/java/io/vertx/core/json/JacksonDatabindTest.java b/src/test/java/io/vertx/core/json/JacksonDatabindTest.java
index 051e198ef..9c3e9b5f6 100644
--- a/src/test/java/io/vertx/core/json/JacksonDatabindTest.java
+++ b/src/test/java/io/vertx/core/json/JacksonDatabindTest.java
@@ -15,6 +15,7 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import io.vertx.core.buffer.Buffer;
+import io.vertx.core.json.impl.JacksonCodec;
 import io.vertx.test.core.TestUtils;
 import io.vertx.test.core.VertxTestBase;
 import org.junit.Test;
@@ -31,22 +32,22 @@ public class JacksonDatabindTest extends VertxTestBase {
 
   @Test
   public void testGetSetMapper() {
-    ObjectMapper mapper = Json.mapper;
+    ObjectMapper mapper = JacksonCodec.mapper;
     assertNotNull(mapper);
     ObjectMapper newMapper = new ObjectMapper();
-    Json.mapper = newMapper;
-    assertSame(newMapper, Json.mapper);
-    Json.mapper = mapper;
+    JacksonCodec.mapper = newMapper;
+    assertSame(newMapper, JacksonCodec.mapper);
+    JacksonCodec.mapper = mapper;
   }
 
   @Test
   public void testGetSetPrettyMapper() {
-    ObjectMapper mapper = Json.prettyMapper;
+    ObjectMapper mapper = JacksonCodec.prettyMapper;
     assertNotNull(mapper);
     ObjectMapper newMapper = new ObjectMapper();
-    Json.prettyMapper = newMapper;
-    assertSame(newMapper, Json.prettyMapper);
-    Json.prettyMapper = mapper;
+    JacksonCodec.prettyMapper = newMapper;
+    assertSame(newMapper, JacksonCodec.prettyMapper);
+    JacksonCodec.prettyMapper = mapper;
   }
 
   @Test
@@ -57,12 +58,12 @@ public class JacksonDatabindTest extends VertxTestBase {
     String json = Json.encode(Collections.singletonList(original));
     List<Pojo> correct;
 
-    correct = Json.decodeValue(json, new TypeReference<List<Pojo>>() {});
+    correct = JacksonCodec.fromString(json, new TypeReference<List<Pojo>>() {});
     assertTrue(((List)correct).get(0) instanceof Pojo);
     assertEquals(original.value, correct.get(0).value);
 
     // same must apply if instead of string we use a buffer
-    correct = Json.decodeValue(Buffer.buffer(json, "UTF8"), new TypeReference<List<Pojo>>() {});
+    correct = JacksonCodec.fromBuffer(Buffer.buffer(json, "UTF8"), new TypeReference<List<Pojo>>() {});
     assertTrue(((List)correct).get(0) instanceof Pojo);
     assertEquals(original.value, correct.get(0).value);
 
diff --git a/src/test/java/io/vertx/core/json/JsonCodecTest.java b/src/test/java/io/vertx/core/json/JsonCodecTest.java
index 625c706ae..66ab1dbeb 100644
--- a/src/test/java/io/vertx/core/json/JsonCodecTest.java
+++ b/src/test/java/io/vertx/core/json/JsonCodecTest.java
@@ -13,6 +13,7 @@ package io.vertx.core.json;
 import com.fasterxml.jackson.core.type.TypeReference;
 import io.vertx.core.buffer.Buffer;
 import io.vertx.core.impl.Utils;
+import io.vertx.core.json.impl.JacksonCodec;
 import io.vertx.test.core.TestUtils;
 import org.junit.Test;
 
@@ -380,14 +381,14 @@ public class JsonCodecTest {
     Type type = ref.getType();
     Class<?> clazz = type instanceof Class ? (Class<?>) type : (Class<?>) ((ParameterizedType) type).getRawType();
     assertEquals(expected, Json.decodeValue(buffer, clazz));
-    assertEquals(expected, Json.decodeValue(buffer, ref));
+    assertEquals(expected, JacksonCodec.fromBuffer(buffer, ref));
     assertEquals(expected, Json.decodeValue(buffer.toString(StandardCharsets.UTF_8), clazz));
-    assertEquals(expected, Json.decodeValue(buffer.toString(StandardCharsets.UTF_8), ref));
+    assertEquals(expected, JacksonCodec.fromString(buffer.toString(StandardCharsets.UTF_8), ref));
     Buffer nullValue = Buffer.buffer("null");
     assertNull(Json.decodeValue(nullValue, clazz));
-    assertNull(Json.decodeValue(nullValue, ref));
+    assertNull(JacksonCodec.fromBuffer(nullValue, ref));
     assertNull(Json.decodeValue(nullValue.toString(StandardCharsets.UTF_8), clazz));
-    assertNull(Json.decodeValue(nullValue.toString(StandardCharsets.UTF_8), ref));
+    assertNull(JacksonCodec.fromString(nullValue.toString(StandardCharsets.UTF_8), ref));
   }
 
   @Test