diff --git a/src/features/editor/components/EditorControls.tsx b/src/features/editor/components/EditorControls.tsx
index de7ee84..9e8157c 100644
--- a/src/features/editor/components/EditorControls.tsx
+++ b/src/features/editor/components/EditorControls.tsx
@@ -1,5 +1,6 @@
 import {
   Box,
+  Braces,
   Download,
   Expand,
   Keyboard,
@@ -11,12 +12,13 @@ import {
   Save,
   Undo2,
 } from "lucide-react";
-import type { TransformMode } from "@/types/editor";
+import type { MapNode, TransformMode } from "@/types/editor";
 
 interface EditorControlsProps {
   transformMode: TransformMode;
   onTransformModeChange: (mode: TransformMode) => void;
   selectedNodeIndex: number | null;
+  mapNodes: MapNode[];
   nodesCount: number;
   selectedNodeName: string | null;
   undoCount: number;
@@ -33,6 +35,7 @@ export function EditorControls({
   transformMode,
   onTransformModeChange,
   selectedNodeIndex,
+  mapNodes,
   nodesCount,
   selectedNodeName,
   undoCount,
@@ -46,6 +49,7 @@ export function EditorControls({
 }: EditorControlsProps): React.JSX.Element {
   const cameraPosition = [0, 50, 100];
   const viewModeLabel = isPlayerMode ? "View locked" : "Lock view";
+  const jsonPreview = getJsonPreview(mapNodes, selectedNodeIndex);
 
   return (
     <>
@@ -230,7 +234,100 @@ export function EditorControls({
             </div>
           </dl>
         </section>
+
+        <section className="editor-json-section" aria-labelledby="json-heading">
+          <div className="editor-section-heading">
+            <h3 id="json-heading">JSON</h3>
+            <span>{jsonPreview.label}</span>
+          </div>
+
+          <pre className="editor-json-view" aria-label={jsonPreview.label}>
+            {jsonPreview.lines.map((line) => (
+              <code
+                key={line.number}
+                className={line.isSelected ? "is-selected" : undefined}
+              >
+                <span>{line.number}</span>
+                {line.content || " "}
+              </code>
+            ))}
+          </pre>
+
+          <div className="editor-json-hint">
+            <Braces size={14} aria-hidden="true" />
+            {selectedNodeIndex === null
+              ? "Raw map JSON"
+              : `Selected node ${selectedNodeIndex + 1} raw lines`}
+          </div>
+        </section>
       </aside>
     </>
   );
 }
+
+interface JsonPreviewLine {
+  number: number;
+  content: string;
+  isSelected: boolean;
+}
+
+interface JsonPreview {
+  label: string;
+  lines: JsonPreviewLine[];
+}
+
+function getJsonPreview(
+  mapNodes: MapNode[],
+  selectedNodeIndex: number | null,
+): JsonPreview {
+  const { lines, ranges } = formatMapNodesWithRanges(mapNodes);
+
+  if (selectedNodeIndex === null || !ranges[selectedNodeIndex]) {
+    return {
+      label: `${lines.length} raw lines`,
+      lines: lines.map((content, index) => ({
+        number: index + 1,
+        content,
+        isSelected: false,
+      })),
+    };
+  }
+
+  const range = ranges[selectedNodeIndex];
+  const selectedLines = lines.slice(range.start - 1, range.end);
+
+  return {
+    label: `Lines ${range.start}-${range.end}`,
+    lines: selectedLines.map((content, index) => ({
+      number: range.start + index,
+      content,
+      isSelected: true,
+    })),
+  };
+}
+
+function formatMapNodesWithRanges(mapNodes: MapNode[]): {
+  lines: string[];
+  ranges: Array<{ start: number; end: number }>;
+} {
+  const lines = ["["];
+  const ranges: Array<{ start: number; end: number }> = [];
+
+  mapNodes.forEach((node, index) => {
+    const objectLines = JSON.stringify(node, null, 2)
+      .split("\n")
+      .map((line) => `  ${line}`);
+
+    if (index < mapNodes.length - 1) {
+      objectLines[objectLines.length - 1] += ",";
+    }
+
+    const start = lines.length + 1;
+    lines.push(...objectLines);
+    ranges.push({ start, end: lines.length });
+  });
+
+  lines.push("]");
+
+  return { lines, ranges };
+}
diff --git a/src/index.css b/src/index.css
index 9438bd8..d59a38b 100644
--- a/src/index.css
+++ b/src/index.css
@@ -262,6 +262,8 @@ canvas {
   border-radius: 28px;
   box-shadow: 0 24px 90px rgba(0, 0, 0, 0.45);
   overflow-y: auto;
+  display: flex;
+  flex-direction: column;
   backdrop-filter: blur(22px);
   scrollbar-width: thin;
   scrollbar-color: #3a3a3a transparent;
@@ -541,6 +543,81 @@ canvas {
   text-align: right;
 }
 
+.editor-json-section {
+  display: flex;
+  flex-direction: column;
+  min-height: 240px;
+  padding: 14px 12px 12px;
+  border-top: 1px solid rgba(255, 255, 255, 0.09);
+}
+
+.editor-json-view {
+  flex: 1;
+  max-height: 320px;
+  margin: 0;
+  padding: 8px 0;
+  overflow: auto;
+  background: #050505;
+  border: 1px solid #1f1f1f;
+  border-radius: 16px;
+  color: #d7d7d7;
+  font-family: "SFMono-Regular", "Courier New", monospace;
+  font-size: 0.72rem;
+  line-height: 1.55;
+  scrollbar-width: thin;
+  scrollbar-color: #3a3a3a transparent;
+}
+
+.editor-json-view::-webkit-scrollbar {
+  width: 6px;
+  height: 6px;
+}
+
+.editor-json-view::-webkit-scrollbar-thumb {
+  background: #3a3a3a;
+  border-radius: 999px;
+}
+
+.editor-json-view code {
+  display: grid;
+  grid-template-columns: 34px max-content;
+  gap: 10px;
+  min-width: 100%;
+  padding: 0 12px;
+  background: transparent;
+  color: inherit;
+  font-family: inherit;
+  white-space: pre;
+}
+
+.editor-json-view code span {
+  color: #5f5f5f;
+  text-align: right;
+  user-select: none;
+}
+
+.editor-json-view code.is-selected {
+  background: #111111;
+  color: #f2f2f2;
+}
+
+.editor-json-view code.is-selected * {
+  color: #f2f2f2;
+}
+
+.editor-json-view code.is-selected span {
+  color: #8a8a8a;
+}
+
+.editor-json-hint {
+  display: flex;
+  align-items: center;
+  gap: 7px;
+  margin-top: 8px;
+  color: #8d8d8d;
+  font-size: 0.74rem;
+}
+
 @media (max-width: 768px) {
   .editor-error h2 {
     font-size: 1.5rem;
@@ -567,4 +644,8 @@ canvas {
     max-height: 46vh;
     border-radius: 22px;
   }
+
+  .editor-json-section {
+    min-height: 180px;
+  }
 }
diff --git a/src/pages/editor/EditorPage.tsx b/src/pages/editor/EditorPage.tsx
index f9022ac..fbe5b34 100644
--- a/src/pages/editor/EditorPage.tsx
+++ b/src/pages/editor/EditorPage.tsx
@@ -173,6 +173,7 @@ export function EditorPage(): React.JSX.Element {
           transformMode={transformMode}
           onTransformModeChange={handleTransformModeChange}
           selectedNodeIndex={selectedNodeIndex}
+          mapNodes={sceneData.mapNodes}
           nodesCount={sceneData.mapNodes.length}
           selectedNodeName={
             selectedNodeIndex !== null && sceneData.mapNodes[selectedNodeIndex]