diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index d3f9af6b5..52fca0687 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -1004,6 +1004,11 @@ Pos=60,60\n\
 Size=395,171\n\
 Collapsed=0\n\
 \n\
+[Window][Tuner]\n\
+Pos=60,60\n\
+Size=395,171\n\
+Collapsed=0\n\
+\n\
 [Window][Warning##Export AudioFileDialogOverWriteDialog]\n\
 Pos=381,351\n\
 Size=500,71\n\
@@ -3748,6 +3753,7 @@ bool FurnaceGUI::loop() {
   DECLARE_METRIC(compatFlags)
   DECLARE_METRIC(piano)
   DECLARE_METRIC(notes)
+  DECLARE_METRIC(tuner)
   DECLARE_METRIC(channels)
   DECLARE_METRIC(patManager)
   DECLARE_METRIC(sysManager)
@@ -4339,6 +4345,7 @@ bool FurnaceGUI::loop() {
         IMPORT_CLOSE(compatFlagsOpen);
         IMPORT_CLOSE(pianoOpen);
         IMPORT_CLOSE(notesOpen);
+        IMPORT_CLOSE(tunerOpen);
         IMPORT_CLOSE(channelsOpen);
         IMPORT_CLOSE(regViewOpen);
         IMPORT_CLOSE(logOpen);
@@ -4704,6 +4711,7 @@ bool FurnaceGUI::loop() {
           if (ImGui::MenuItem(_("oscilloscope (per-channel)"),BIND_FOR(GUI_ACTION_WINDOW_CHAN_OSC),chanOscOpen)) chanOscOpen=!chanOscOpen;
           if (ImGui::MenuItem(_("oscilloscope (X-Y)"),BIND_FOR(GUI_ACTION_WINDOW_XY_OSC),xyOscOpen)) xyOscOpen=!xyOscOpen;
           if (ImGui::MenuItem(_("volume meter"),BIND_FOR(GUI_ACTION_WINDOW_VOL_METER),volMeterOpen)) volMeterOpen=!volMeterOpen;
+          if (ImGui::MenuItem(_("tuner"), BIND_FOR(GUI_ACTION_WINDOW_TUNER), tunerOpen)) tunerOpen = !tunerOpen;
           ImGui::EndMenu();
         }
         if (ImGui::BeginMenu(_("tempo"))) {
@@ -4978,6 +4986,7 @@ bool FurnaceGUI::loop() {
       MEASURE(compatFlags,drawCompatFlags());
       MEASURE(piano,drawPiano());
       MEASURE(notes,drawNotes());
+      MEASURE(tuner, drawTuner());
       MEASURE(channels,drawChannels());
       MEASURE(patManager,drawPatManager());
       MEASURE(sysManager,drawSysManager());
@@ -8058,6 +8067,7 @@ void FurnaceGUI::syncState() {
   pianoOpen=e->getConfBool("pianoOpen",false);
 #endif
   notesOpen=e->getConfBool("notesOpen",false);
+  tunerOpen = e->getConfBool("tunerOpen", false);
   channelsOpen=e->getConfBool("channelsOpen",false);
   patManagerOpen=e->getConfBool("patManagerOpen",false);
   sysManagerOpen=e->getConfBool("sysManagerOpen",false);
@@ -8216,6 +8226,7 @@ void FurnaceGUI::commitState(DivConfig& conf) {
   conf.set("compatFlagsOpen",compatFlagsOpen);
   conf.set("pianoOpen",pianoOpen);
   conf.set("notesOpen",notesOpen);
+  conf.set("tunerOpen", tunerOpen);
   conf.set("channelsOpen",channelsOpen);
   conf.set("patManagerOpen",patManagerOpen);
   conf.set("sysManagerOpen",sysManagerOpen);
@@ -8610,6 +8621,7 @@ FurnaceGUI::FurnaceGUI():
   compatFlagsOpen(false),
   pianoOpen(false),
   notesOpen(false),
+  tunerOpen(false),
   channelsOpen(false),
   regViewOpen(false),
   logOpen(false),
diff --git a/src/gui/gui.h b/src/gui/gui.h
index 46d541299..5125fe3b6 100644
--- a/src/gui/gui.h
+++ b/src/gui/gui.h
@@ -542,6 +542,7 @@ enum FurnaceGUIWindows {
   GUI_WINDOW_COMPAT_FLAGS,
   GUI_WINDOW_PIANO,
   GUI_WINDOW_NOTES,
+  GUI_WINDOW_TUNER,
   GUI_WINDOW_CHANNELS,
   GUI_WINDOW_PAT_MANAGER,
   GUI_WINDOW_SYS_MANAGER,
@@ -746,6 +747,7 @@ enum FurnaceGUIActions {
   GUI_ACTION_WINDOW_COMPAT_FLAGS,
   GUI_ACTION_WINDOW_PIANO,
   GUI_ACTION_WINDOW_NOTES,
+  GUI_ACTION_WINDOW_TUNER,
   GUI_ACTION_WINDOW_CHANNELS,
   GUI_ACTION_WINDOW_PAT_MANAGER,
   GUI_ACTION_WINDOW_SYS_MANAGER,
@@ -2360,7 +2362,7 @@ class FurnaceGUI {
   bool editControlsOpen, ordersOpen, insListOpen, songInfoOpen, patternOpen, insEditOpen;
   bool waveListOpen, waveEditOpen, sampleListOpen, sampleEditOpen, aboutOpen, settingsOpen;
   bool mixerOpen, debugOpen, inspectorOpen, oscOpen, volMeterOpen, statsOpen, compatFlagsOpen;
-  bool pianoOpen, notesOpen, channelsOpen, regViewOpen, logOpen, effectListOpen, chanOscOpen;
+  bool pianoOpen, notesOpen, tunerOpen, channelsOpen, regViewOpen, logOpen, effectListOpen, chanOscOpen;
   bool subSongsOpen, findOpen, spoilerOpen, patManagerOpen, sysManagerOpen, clockOpen, speedOpen;
   bool groovesOpen, xyOscOpen, memoryOpen, csPlayerOpen, cvOpen, userPresetsOpen;
 
@@ -2932,6 +2934,7 @@ class FurnaceGUI {
   void drawCompatFlags();
   void drawPiano();
   void drawNotes(bool asChild=false);
+  void drawTuner(bool asChild=false);
   void drawChannels();
   void drawPatManager();
   void drawSysManager();
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index da769cbd1..f3ce7fb6e 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -640,6 +640,7 @@ const FurnaceGUIActionDef guiActions[GUI_ACTION_MAX]={
   D("WINDOW_COMPAT_FLAGS", _N("Compatibility Flags"), 0),
   D("WINDOW_PIANO", _N("Piano"), 0),
   D("WINDOW_NOTES", _N("Song Comments"), 0),
+  D("WINDOW_TUNER", _N("Tuner"), 0),
   D("WINDOW_CHANNELS", _N("Channels"), 0),
   D("WINDOW_PAT_MANAGER", _N("Pattern Manager"), 0),
   D("WINDOW_SYS_MANAGER", _N("Chip Manager"), 0),
diff --git a/src/gui/tuner.cpp b/src/gui/tuner.cpp
new file mode 100644
index 000000000..57c532142
--- /dev/null
+++ b/src/gui/tuner.cpp
@@ -0,0 +1,33 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2025 tildearrow and contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "gui.h"
+#include "misc/cpp/imgui_stdlib.h"
+
+// NOTE: please don't ask me to enable text wrap.
+//       Dear ImGui doesn't have that feature. D:
+void FurnaceGUI::drawTuner(bool asChild) {
+  if (nextWindow==GUI_WINDOW_TUNER) {
+    tunerOpen=true;
+    ImGui::SetNextWindowFocus();
+    nextWindow=GUI_WINDOW_NOTHING;
+  }
+  if (!tunerOpen&&!asChild) return;
+  bool began=asChild?ImGui::BeginChild("Song Info##Song Information"):ImGui::Begin("Song Comments",&tunerOpen,globalWinFlags,_("Tuner"));
+}