diff --git a/Backend/tools-services/src/main/java/com/r11/tools/SparkApplication.java b/Backend/tools-services/src/main/java/com/r11/tools/SparkApplication.java
index affcebb..cee98f2 100644
--- a/Backend/tools-services/src/main/java/com/r11/tools/SparkApplication.java
+++ b/Backend/tools-services/src/main/java/com/r11/tools/SparkApplication.java
@@ -32,12 +32,16 @@ public class SparkApplication {
             .setPrettyPrinting()
             .create();
 
+        Gson jsongson = new GsonBuilder()
+            .disableHtmlEscaping()
+            .create();
+
         RestControllerRegistry registry = new RestControllerRegistry();
         registry.registerController(new ProcessorInfoController(logger));
         registry.registerController(new XsdController(gson, logger));
         registry.registerController(new XPathController(gson, logger));
         registry.registerController(new XsltController(gson, logger));
-        registry.registerController(new JsonController());
+        registry.registerController(new JsonController(gson, jsongson, logger));
 
         registry.register();
 
diff --git a/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java b/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java
index 1d465fd..8574c3b 100644
--- a/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java
+++ b/Backend/tools-services/src/main/java/com/r11/tools/controller/JsonController.java
@@ -1,7 +1,7 @@
 package com.r11.tools.controller;
 
 import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
+//import com.google.gson.GsonBuilder;
 import com.google.gson.JsonObject;
 import com.r11.tools.controller.internal.GlobalControllerManifest;
 import com.r11.tools.controller.internal.HandlerType;
@@ -9,18 +9,22 @@ import com.r11.tools.controller.internal.RestController;
 import com.r11.tools.controller.internal.ScopedControllerManifest;
 import spark.Request;
 import spark.Response;
+import org.apache.logging.log4j.Logger;
 
 @GlobalControllerManifest(path = "/json")
 public class JsonController implements RestController {
 
-    private final Gson prettyGson = new GsonBuilder()
-            .disableHtmlEscaping()
-            .setPrettyPrinting()
-            .create();
+    private final Logger logger;
 
-    private final Gson gson = new GsonBuilder()
-            .disableHtmlEscaping()
-            .create();
+    private final Gson prettyGson; 
+
+    private final Gson gson;
+
+    public JsonController(Gson prettyGson, Gson jsongson,Logger logger) {
+            this.logger = logger;
+            this.prettyGson = prettyGson;
+            this.gson = jsongson;
+    }
 
     @ScopedControllerManifest(method = HandlerType.POST, path = "/formatting")
     public void formatting(Request request, Response response) {
@@ -35,17 +39,20 @@ public class JsonController implements RestController {
             responseJson.addProperty("data", this.prettyGson.toJson(requestJson));
             responseJson.addProperty("time", System.currentTimeMillis() - startProcess);
 
-            response.body(this.prettyGson.toJson(responseJson));
+            
         } catch (Exception e) {
+            this.logger.error("Error on formatting Json " + e);
             Throwable cause = e.getCause();
 
-            response.status(500);
+            response.status(400);
 
             responseJson.addProperty("data", cause == null ? e.getMessage() : cause.getMessage());
             responseJson.addProperty("time", System.currentTimeMillis() - startProcess);
 
+            
+        }   
+        this.logger.info("Json processed in " + responseJson.get("time").toString() + " ms.");
             response.body(this.prettyGson.toJson(responseJson));
-        }
     }
 
     @ScopedControllerManifest(method = HandlerType.POST, path = "/minimize")
@@ -63,14 +70,16 @@ public class JsonController implements RestController {
 
             response.body(this.gson.toJson(responseJson));
         } catch (Exception e) {
+            this.logger.error("Error on minimizeing Json " + e);
             Throwable cause = e.getCause();
 
-            response.status(500);
+            response.status(400);
 
             responseJson.addProperty("data", cause == null ? e.getMessage() : cause.getMessage());
             responseJson.addProperty("time", System.currentTimeMillis() - startProcess);
 
             response.body(this.prettyGson.toJson(responseJson));
         }
+        this.logger.info("Json processed in " + responseJson.get("time").toString() + " ms.");
     }
 }