diff --git a/framework/engine/src/mm/engine.hpp b/framework/engine/src/mm/engine.hpp
index f67fb44..b18f80c 100644
--- a/framework/engine/src/mm/engine.hpp
+++ b/framework/engine/src/mm/engine.hpp
@@ -67,6 +67,9 @@ class Engine {
 			_update_strategy = std::move(us);
 		}
 
+		Engine(const Engine&) = delete;
+		Engine(Engine&&) = delete;
+
 		// called from destructor or explicitly (if eg "global", u need dis)
 		void cleanup(void);
 
diff --git a/framework/imgui/CMakeLists.txt b/framework/imgui/CMakeLists.txt
index 3c01ef2..be8aa7d 100644
--- a/framework/imgui/CMakeLists.txt
+++ b/framework/imgui/CMakeLists.txt
@@ -18,6 +18,7 @@ target_link_libraries(imgui_service
 	engine
 	imgui_render_task
 )
+
 ################## imgui_widgets
 
 add_library(imgui_widgets
@@ -30,6 +31,7 @@ add_library(imgui_widgets
 	./src/mm/imgui/widgets/spritesheet.hpp
 	./src/mm/imgui/widgets/texture.hpp
 	./src/mm/imgui/widgets/texture_resource_manager.hpp
+	./src/mm/imgui/widgets/imgui_json_editor.hpp
 
 	./src/mm/imgui/widgets/auto_wrap.hpp
 
diff --git a/framework/imgui/src/mm/imgui/widgets/imgui_json_editor.hpp b/framework/imgui/src/mm/imgui/widgets/imgui_json_editor.hpp
new file mode 100644
index 0000000..d36b92c
--- /dev/null
+++ b/framework/imgui/src/mm/imgui/widgets/imgui_json_editor.hpp
@@ -0,0 +1,343 @@
+// for the license, see the end of the file
+#pragma once
+
+#include <imgui.h>
+#include <nlohmann/json.hpp>
+#include <imgui/misc/cpp/imgui_stdlib.h>
+
+namespace MM::ImGuiWidgets {
+
+static const ImVec4 bool_true_color{0.2f, 1.0f, 0.3f, 1.f};
+static const ImVec4 bool_false_color{1.0f, 0.2f, 0.3f, 1.f};
+static const ImVec4 string_color{0.8f, 0.8f, 0.3f, 1.f};
+static const ImVec4 int_color{0.6f, 0.3f, 0.8f, 1.f};
+static const ImVec4 unsigned_color{0.3f, 0.6f, 0.8f, 1.f};
+static const ImVec4 float_color{0.3f, 0.3f, 0.8f, 1.f};
+
+// takes const, only displays, no tree, super simple
+template <typename JsonObjectType = nlohmann::ordered_json>
+void JsonViewerSimple(const char* name, const JsonObjectType& json) {
+	ImGui::PushID(name);
+
+	ImGui::Text("%s:", name);
+
+	if (ImGui::IsItemHovered()) {
+		ImGui::BeginTooltip();
+		ImGui::TextUnformatted(json.type_name());
+		ImGui::EndTooltip();
+	}
+
+	ImGui::SameLine();
+
+	switch (json.type()) {
+		case JsonObjectType::value_t::null:
+			ImGui::TextDisabled("NULL");
+			break;
+		case JsonObjectType::value_t::boolean:
+			if (json.template get<bool>()) {
+				ImGui::TextColored(bool_true_color, "true");
+			} else {
+				ImGui::TextColored(bool_false_color, "false");
+			}
+
+			//if (ImGui::IsItemClicked()) {
+				//json = !json.template get<bool>();
+			//}
+			break;
+		case JsonObjectType::value_t::string:
+			{
+				const std::string& str_ref = json.template get_ref<const std::string&>();
+				if (str_ref.size() < 100) {
+					ImGui::TextColored(string_color, "\"%s\"", str_ref.c_str());
+				} else {
+					ImGui::TextDisabled("!! text too long to display !!");
+				}
+			}
+			break;
+		case JsonObjectType::value_t::number_integer:
+			ImGui::TextColored(int_color, "%ld", json.template get<int64_t>());
+			break;
+		case JsonObjectType::value_t::number_unsigned:
+			ImGui::TextColored(unsigned_color, "%lu", json.template get<uint64_t>());
+			break;
+		case JsonObjectType::value_t::number_float:
+			ImGui::TextColored(float_color, "%f", json.template get<float>());
+			break;
+		case JsonObjectType::value_t::object:
+			ImGui::TextDisabled("{%d}", json.size());
+
+			ImGui::Indent();
+			for (auto& [key, value] : json.items()) {
+				JsonViewerSimple(key.c_str(), value);
+			}
+			ImGui::Unindent();
+
+			break;
+		case JsonObjectType::value_t::array:
+			ImGui::TextDisabled("[%d]", json.size());
+
+			ImGui::Indent();
+			for (auto& [key, value] : json.items()) {
+				JsonViewerSimple(key.c_str(), value);
+			}
+			ImGui::Unindent();
+
+			break;
+		case JsonObjectType::value_t::binary:
+			ImGui::TextDisabled("(...) TODO: display binary");
+			break;
+		case JsonObjectType::value_t::discarded:
+			ImGui::Text("%s DISCARDED", name); // whats this?
+			break;
+	}
+
+	ImGui::PopID();
+}
+
+// takes const, only displays, tree
+template <typename JsonObjectType = nlohmann::ordered_json>
+void JsonViewerTree(const char* name, const JsonObjectType& json) {
+	// if array or object, tree node
+	if (json.is_structured()) {
+		const bool tree_open = ImGui::TreeNode(name, "%s:", name);
+
+		ImGui::SameLine();
+		if (json.is_object()) {
+			ImGui::TextDisabled("{%d}", json.size());
+		} else { // is_array()
+			ImGui::TextDisabled("[%d]", json.size());
+		}
+
+		if (tree_open) {
+			for (auto& [key, value] : json.items()) {
+				JsonViewerTree(key.c_str(), value);
+			}
+
+			ImGui::TreePop();
+		}
+	} else {
+		ImGui::PushID(name);
+
+		ImGui::Text("%s:", name);
+		ImGui::SameLine();
+
+		switch (json.type()) {
+			case JsonObjectType::value_t::null:
+				ImGui::TextDisabled("NULL");
+				break;
+			case JsonObjectType::value_t::boolean:
+				if (json.template get<bool>()) {
+					ImGui::TextColored(bool_true_color, "true");
+				} else {
+					ImGui::TextColored(bool_false_color, "false");
+				}
+				break;
+			case JsonObjectType::value_t::string:
+				{
+					const std::string& str_ref = json.template get_ref<const std::string&>();
+					if (str_ref.size() < 100) {
+						ImGui::TextColored(string_color, "\"%s\"", str_ref.c_str());
+					} else {
+						ImGui::TextDisabled("!! text too long to display !!");
+					}
+				}
+				break;
+			case JsonObjectType::value_t::number_integer:
+				ImGui::TextColored(int_color, "%ld", json.template get<int64_t>());
+				break;
+			case JsonObjectType::value_t::number_unsigned:
+				ImGui::TextColored(unsigned_color, "%lu", json.template get<uint64_t>());
+				break;
+			case JsonObjectType::value_t::number_float:
+				ImGui::TextColored(float_color, "%f", json.template get<float>());
+				break;
+			case JsonObjectType::value_t::binary:
+				ImGui::TextDisabled("(...) TODO: display binary");
+				break;
+			case JsonObjectType::value_t::discarded:
+				ImGui::Text("%s DISCARDED", name); // whats this?
+				break;
+			default:
+				ImGui::Text("you should not be here....");
+				break;
+		}
+		ImGui::PopID();
+	}
+}
+
+namespace detail {
+
+template <typename JsonObjectType = nlohmann::ordered_json>
+void JsonTypeCombo(typename JsonObjectType::value_t& type) {
+	const std::array<const char*, 10> type_strings {
+		"null",
+		"object",
+		"array",
+		"string",
+		"boolean",
+		"number_integer",
+		"number_unsigned",
+		"number_float",
+		"binary",
+		"discarded"
+	};
+
+	int tmp_index = static_cast<uint8_t>(type);
+
+	ImGui::Combo("type", &tmp_index, type_strings.data(), type_strings.size());
+
+	type = static_cast<typename JsonObjectType::value_t>(tmp_index);
+}
+
+} // detail
+
+// edits, tree
+template <typename JsonObjectType = nlohmann::ordered_json>
+void JsonEditor(const char* name, JsonObjectType& json) {
+	// if array or object, tree node
+	if (json.is_structured()) {
+		const bool tree_open = ImGui::TreeNode(name, "%s:", name);
+
+		ImGui::SameLine();
+		if (json.is_object()) {
+			ImGui::TextDisabled("{%d}", json.size());
+		} else { // is_array()
+			ImGui::TextDisabled("[%d]", json.size());
+		}
+
+		if (tree_open) {
+			size_t index = 0; // for array, and id
+
+			// for each entry in array or object
+			for (auto it = json.begin(); it != json.end(); index++) {
+				ImGui::PushID(index);
+
+				if (ImGui::SmallButton("-")) {
+					it = json.erase(it);
+					ImGui::PopID();
+					continue;
+				}
+
+				ImGui::SameLine();
+
+				if (json.is_object()) {
+					JsonEditor(it.key().c_str(), it.value());
+				} else { // is_array()
+					auto tmp_key_str = std::to_string(index);
+					JsonEditor(tmp_key_str.c_str(), it.value());
+				}
+
+				ImGui::PopID();
+				it++;
+			}
+
+			{ // the add button
+				const bool add_button = ImGui::SmallButton("+");
+
+				static char key_buff[256] = {};
+				ImGui::SameLine();
+				if (json.is_object()) {
+					// TODO: dynamically limit item width
+					ImGui::SetNextItemWidth(200.f);
+					ImGui::InputText("key", key_buff, 255);
+					ImGui::SameLine();
+				}
+
+				static typename JsonObjectType::value_t type = JsonObjectType::value_t::null;
+				// TODO: dynamically limit item width
+				ImGui::SetNextItemWidth(200.f);
+				detail::JsonTypeCombo(type);
+
+				if (add_button) {
+					if (json.is_object()) {
+						json[key_buff] = type;
+					} else { // is_array()
+						json.push_back(type);
+					}
+				}
+			}
+
+			ImGui::TreePop();
+		}
+	} else { // not array or object
+		ImGui::PushID(name);
+
+		ImGui::Text("%s:", name);
+		ImGui::SameLine();
+
+		switch (json.type()) {
+			case JsonObjectType::value_t::null:
+				ImGui::TextDisabled("NULL");
+				break;
+			case JsonObjectType::value_t::boolean:
+				if (json.template get<bool>()) {
+					ImGui::TextColored(bool_true_color, "true");
+				} else {
+					ImGui::TextColored(bool_false_color, "false");
+				}
+
+				if (ImGui::IsItemClicked()) {
+					json = !json.template get<bool>();
+				}
+				break;
+			case JsonObjectType::value_t::string:
+				{
+					std::string& str_ref = json.template get_ref<std::string&>();
+					ImGui::InputText("string", &str_ref);
+					//if (str_ref.size() < 100) {
+						//ImGui::TextColored(string_color, "\"%s\"", str_ref.c_str());
+					//} else {
+						//ImGui::TextDisabled("!! text too long to display !!");
+					//}
+				}
+				break;
+			case JsonObjectType::value_t::number_integer:
+				//ImGui::TextColored(int_color, "%ld", json.template get_ref<int64_t&>());
+				ImGui::InputScalar("integer", ImGuiDataType_S64, &json.template get_ref<int64_t&>());
+				break;
+			case JsonObjectType::value_t::number_unsigned:
+				//ImGui::TextColored(unsigned_color, "%lu", json.template get<uint64_t>());
+				ImGui::InputScalar("unsigned", ImGuiDataType_U64, &json.template get_ref<int64_t&>());
+				break;
+			case JsonObjectType::value_t::number_float:
+				//ImGui::TextColored(float_color, "%f", json.template get<float>());
+				ImGui::InputDouble("float", &(json.template get_ref<double&>()));
+				break;
+			case JsonObjectType::value_t::binary:
+				ImGui::TextDisabled("(...) TODO: display binary");
+				break;
+			case JsonObjectType::value_t::discarded:
+				ImGui::Text("%s DISCARDED", name); // whats this?
+				break;
+			default:
+				ImGui::Text("you should not be here....");
+				break;
+		}
+		ImGui::PopID();
+	}
+}
+
+} // MM::ImGuiWidgets
+
+// MIT License
+
+// Copyright (c) 2021 Erik Scholz
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
diff --git a/framework/imgui/test/CMakeLists.txt b/framework/imgui/test/CMakeLists.txt
index 1c25759..7634554 100644
--- a/framework/imgui/test/CMakeLists.txt
+++ b/framework/imgui/test/CMakeLists.txt
@@ -1,3 +1,21 @@
+add_executable(imgui_json_test
+	./json_editor_test.cpp
+)
+target_include_directories(imgui_json_test PRIVATE ".")
+target_link_libraries(imgui_json_test
+	engine
+	sdl_service
+	opengl_renderer_s
+	imgui_service
+	imgui_render_task
+	imgui_widgets
+	nlohmann_json::nlohmann_json
+	gtest_main
+)
+add_test(NAME imgui_json_test COMMAND imgui_json_test)
+
+####################
+
 add_executable(imgui_widget_test
 	./widget_test.cpp
 )
diff --git a/framework/imgui/test/json_editor_test.cpp b/framework/imgui/test/json_editor_test.cpp
new file mode 100644
index 0000000..4cbe3f6
--- /dev/null
+++ b/framework/imgui/test/json_editor_test.cpp
@@ -0,0 +1,202 @@
+#include "nlohmann/json_fwd.hpp"
+#include <gtest/gtest.h>
+
+#include <mm/engine.hpp>
+
+// services
+#include <mm/services/sdl_service.hpp>
+#include <mm/services/filesystem.hpp>
+#include <mm/services/opengl_renderer.hpp>
+#include <mm/services/imgui_s.hpp>
+
+#include <mm/opengl/render_tasks/imgui.hpp>
+
+#include <imgui/imgui.h>
+
+#include <mm/imgui/widgets/imgui_json_editor.hpp>
+
+const char* argv0;
+
+TEST(imgui_json_editor, basic) {
+	MM::Engine engine;
+
+	auto& sdl_ss = engine.addService<MM::Services::SDLService>();
+	ASSERT_TRUE(engine.enableService<MM::Services::SDLService>());
+
+	sdl_ss.createGLWindow("imgui_json_editor_test", 1280, 720);
+
+	engine.addService<MM::Services::FilesystemService>(argv0, "imgui_json_editor_test");
+	ASSERT_TRUE(engine.enableService<MM::Services::FilesystemService>());
+
+	engine.addService<MM::Services::ImGuiService>();
+	ASSERT_TRUE(engine.enableService<MM::Services::ImGuiService>());
+
+	auto& rs = engine.addService<MM::Services::OpenGLRenderer>();
+	ASSERT_TRUE(engine.enableService<MM::Services::OpenGLRenderer>());
+
+	rs.addRenderTask<MM::OpenGL::RenderTasks::ImGuiRT>(engine);
+
+	class TestWindow : public MM::Services::Service {
+		public:
+			const char* name(void) override { return "TestWindow"; }
+
+			bool enable(MM::Engine&, std::vector<MM::UpdateStrategies::TaskInfo>& task_array) override {
+				task_array.push_back(
+					MM::UpdateStrategies::TaskInfo{"testwindow"}
+					.fn([this](MM::Engine&) { render(); })
+				);
+				return true;
+			}
+
+			void disable(MM::Engine&) override {}
+
+			void render(void) {
+				if (ImGui::Begin("test window")) {
+					MM::ImGuiWidgets::JsonViewerSimple("test", _j);
+
+					ImGui::Separator();
+
+					MM::ImGuiWidgets::JsonViewerTree("test", _j);
+
+					ImGui::Separator();
+
+					try {
+						MM::ImGuiWidgets::JsonEditor("test", _j);
+						//using tmp_type = decltype(_j.items().begin());
+						//tmp_type item{_j.begin()};
+						//item.key();
+					} catch(...) {
+						assert(false);
+					}
+
+					_j.type();
+
+					ImGui::Separator();
+
+					const auto string = _j.dump(4);
+					ImGui::TextUnformatted(string.c_str());
+				}
+				ImGui::End();
+			}
+
+			//nlohmann::ordered_json _j{
+				//true,
+				//"tseta",
+				//1.f,
+				//1,
+				//1u,
+				//nullptr,
+				//nlohmann::ordered_json::object({{"hi", 10}})
+			//};
+
+			//nlohmann::ordered_json _j = R"({"hi": 12})"_json;
+			//nlohmann::ordered_json _j = nlohmann::ordered_json::object({{"hi", 10}});
+			nlohmann::ordered_json _j = R"(
+{
+	"data": {
+		"cooldown": 6.0,
+		"igs": [
+			{
+				"data": {
+					"aoe_color": [
+						0.2980392277240753,
+						0.23137255012989044,
+						0.1921568661928177,
+						0.7764706015586853
+					],
+					"interactions": [
+						{
+							"data": {
+								"atb": {
+									"ag": {
+										"base": -0.25,
+										"per_slvl": -0.0375
+									},
+									"en": {
+										"base": -0.35,
+										"per_slvl": -0.0525
+									},
+									"in": {
+										"base": -0.35,
+										"per_slvl": -0.0525
+									},
+									"ne": null,
+									"pe": null
+								}
+							},
+							"type": "interaction::hp_dst"
+						},
+						{
+							"data": {
+								"buffs": [
+									{
+										"atb": {
+											"ag": {
+												"base": -0.15,
+												"per_slvl": -0.0075
+											},
+											"in": null,
+											"ne": {
+												"base": -0.05,
+												"per_slvl": -0.0025
+											},
+											"pe": null
+										},
+										"duration": {
+											"base": 2.0,
+											"per_slvl": 0.0
+										},
+										"type": "FAC"
+									}
+								]
+							},
+							"type": "interaction::debuffs_dst"
+						}
+					],
+					"offset": 0.5,
+					"pierce": true,
+					"pierce_walls": false,
+					"radius": 0.75,
+					"target_own_team": false
+				},
+				"type": "ig::aoe"
+			},
+			{
+				"data": {
+					"interactions": [
+						{
+							"data": {
+								"trauma_add": 0.04
+							},
+							"type": "interaction::camera_trauma_dst"
+						}
+					],
+					"interactions_via": []
+				},
+				"type": "ig::self"
+			}
+		]
+	},
+	"type": "spell::one_shot"
+}
+)"_json;
+	};
+
+	engine.addService<TestWindow>(); // engine dtr ?????????????????
+
+	ASSERT_TRUE(engine.enableService<TestWindow>());
+
+	engine.run();
+
+	sdl_ss.destroyWindow();
+	engine.cleanup();
+}
+
+int main(int argc, char** argv) {
+	argv0 = argv[0];
+
+	::testing::InitGoogleTest(&argc, argv);
+
+	return RUN_ALL_TESTS();
+}
+