diff --git a/lldb/tools/lldb-vscode/VSCode.cpp b/lldb/tools/lldb-vscode/VSCode.cpp
--- a/lldb/tools/lldb-vscode/VSCode.cpp
+++ b/lldb/tools/lldb-vscode/VSCode.cpp
@@ -89,12 +89,6 @@
   output.write_full(llvm::utostr(json_str.size()));
   output.write_full("\r\n\r\n");
   output.write_full(json_str);
-
-  if (log) {
-    *log << "<-- " << std::endl
-         << "Content-Length: " << json_str.size() << "\r\n\r\n"
-         << json_str << std::endl;
-  }
 }
 
 // Serialize the JSON value into a string and send the JSON packet to
@@ -105,7 +99,14 @@
   strm << json;
   static std::mutex mutex;
   std::lock_guard<std::mutex> locker(mutex);
-  SendJSON(strm.str());
+  std::string json_str = strm.str();
+  SendJSON(json_str);
+
+  if (log) {
+    *log << "<-- " << std::endl
+         << "Content-Length: " << json_str.size() << "\r\n\r\n"
+         << llvm::formatv("{0:2}", json).str() << std::endl;
+  }
 }
 
 // Read a JSON packet from the "in" stream.
@@ -129,11 +130,8 @@
   if (!input.read_full(log.get(), length, json_str))
     return json_str;
 
-  if (log) {
-    *log << "--> " << std::endl
-         << "Content-Length: " << length << "\r\n\r\n"
-         << json_str << std::endl;
-  }
+  if (log)
+    *log << "--> " << std::endl << "Content-Length: " << length << "\r\n\r\n";
 
   return json_str;
 }
@@ -523,6 +521,11 @@
     }
     return PacketStatus::JSONMalformed;
   }
+
+  if (log) {
+    *log << llvm::formatv("{0:2}", *json_value).str() << std::endl;
+  }
+
   llvm::json::Object *object_ptr = json_value->getAsObject();
   if (!object_ptr) {
     if (log)