diff --git a/public/javascripts/dialogs/note_source.js b/public/javascripts/dialogs/note_source.js
new file mode 100644
index 000000000..6fb1f4d6f
--- /dev/null
+++ b/public/javascripts/dialogs/note_source.js
@@ -0,0 +1,56 @@
+"use strict";
+
+const noteSource = (function() {
+    const dialogEl = $("#note-source-dialog");
+    const noteSourceEl = $("#note-source");
+
+    function showDialog() {
+        glob.activeDialog = dialogEl;
+
+        dialogEl.dialog({
+            modal: true,
+            width: 800
+        });
+
+        const noteText = noteEditor.getCurrentNote().detail.note_text;
+
+        noteSourceEl.text(formatHtml(noteText));
+    }
+
+    function formatHtml(str) {
+        const div = document.createElement('div');
+        div.innerHTML = str.trim();
+
+        return formatNode(div, 0).innerHTML.trim();
+    }
+
+    function formatNode(node, level) {
+        const indentBefore = new Array(level++ + 1).join('  ');
+        const indentAfter  = new Array(level - 1).join('  ');
+        let textNode;
+
+        for (let i = 0; i < node.children.length; i++) {
+            textNode = document.createTextNode('\n' + indentBefore);
+            node.insertBefore(textNode, node.children[i]);
+
+            formatNode(node.children[i], level);
+
+            if (node.lastElementChild === node.children[i]) {
+                textNode = document.createTextNode('\n' + indentAfter);
+                node.appendChild(textNode);
+            }
+        }
+
+        return node;
+    }
+
+    $(document).bind('keydown', 'ctrl+u', e => {
+        showDialog();
+
+        e.preventDefault();
+    });
+
+    return {
+        showDialog
+    };
+})();
\ No newline at end of file
diff --git a/views/index.ejs b/views/index.ejs
index 3bbfd43f1..d5b3fffe5 100644
--- a/views/index.ejs
+++ b/views/index.ejs
@@ -326,6 +326,10 @@
       </table>
     </div>
 
+    <div id="note-source-dialog" title="Note source" style="display: none; padding: 20px;">
+      <pre id="note-source"></pre>
+    </div>
+
     <div id="tooltip" style="display: none;"></div>
 
     <script type="text/javascript">
@@ -390,6 +394,7 @@
     <script src="javascripts/dialogs/event_log.js"></script>
     <script src="javascripts/dialogs/edit_tree_prefix.js"></script>
     <script src="javascripts/dialogs/sql_console.js"></script>
+    <script src="javascripts/dialogs/note_source.js"></script>
 
     <script src="javascripts/link.js"></script>
     <script src="javascripts/sync.js"></script>