diff --git a/resources/lang/en.json b/resources/lang/en.json
index 6c89617f8b..effc4e7202 100644
--- a/resources/lang/en.json
+++ b/resources/lang/en.json
@@ -1667,6 +1667,7 @@
     "toggle_view_desc": "Alternate view (terrain/countries)",
     "toggle_visibility": "Toggle Visibility",
     "unbind": "Unbind",
+    "unbind_all": "Unbind All",
     "view_options": "View Options",
     "zoom_controls": "Zoom Controls",
     "zoom_in": "Zoom In",
diff --git a/src/client/UserSettingModal.ts b/src/client/UserSettingModal.ts
index 428afd95dd..0a4a9a2dd4 100644
--- a/src/client/UserSettingModal.ts
+++ b/src/client/UserSettingModal.ts
@@ -73,6 +73,12 @@ export class UserSettingModal extends BaseModal {
     this.userKeybinds = validated;
   }
 
+  private unbindAllKeybinds() {
+    this.userSettings.unbindAllKeybinds(Platform.isMac);
+    this.loadKeybindsFromStorage();
+    this.requestUpdate();
+  }
+
   private handleKeybindChange(
     e: CustomEvent<{
       action: string;
@@ -366,6 +372,13 @@ export class UserSettingModal extends BaseModal {
         ${translateText("user_setting.keybinds_hint")}
       </div>
 
+      <button
+        class="text-xs font-bold uppercase tracking-wider bg-white/5 hover:bg-red-500/20 border border-white/10 hover:border-red-500/50 px-4 py-2 rounded text-white/70 hover:text-red-200 transition-colors mt-3"
+        @click=${this.unbindAllKeybinds}
+      >
+        ${translateText("user_setting.unbind_all")}
+      </button>
+
       <h2
         class="text-blue-200 text-xl font-bold mt-4 mb-3 border-b border-white/10 pb-2"
       >
diff --git a/src/core/game/UserSettings.ts b/src/core/game/UserSettings.ts
index 7be154af9e..b1b8e6c0b3 100644
--- a/src/core/game/UserSettings.ts
+++ b/src/core/game/UserSettings.ts
@@ -551,6 +551,18 @@ export class UserSettings {
     }
   }
 
+  /**
+   * Unbind every keybind at once: set each default action to "Null" (the same
+   * sentinel a single per-key Unbind uses), so keybinds() drops them all.
+   */
+  unbindAllKeybinds(isMac: boolean): void {
+    const unbound: Record<string, string> = {};
+    for (const action of Object.keys(getDefaultKeybinds(isMac))) {
+      unbound[action] = "Null";
+    }
+    this.setKeybinds(unbound);
+  }
+
   soundEffectsVolume(): number {
     return this.getFloat("settings.soundEffectsVolume", 0);
   }
diff --git a/tests/UserSettings.test.ts b/tests/UserSettings.test.ts
index b526425858..077fa994e5 100644
--- a/tests/UserSettings.test.ts
+++ b/tests/UserSettings.test.ts
@@ -1,5 +1,6 @@
 import {
   EFFECTS_KEY,
+  getDefaultKeybinds,
   PLAYER_STATS_COLUMNS_KEY,
   TEAM_STATS_COLUMNS_KEY,
   UserSettings,
@@ -135,3 +136,26 @@ describe("UserSettings stats columns", () => {
     expect(localStorage.getItem(TEAM_STATS_COLUMNS_KEY)).toBe('["warships"]');
   });
 });
+
+describe("UserSettings unbindAllKeybinds (#4309)", () => {
+  beforeEach(() => {
+    localStorage.clear();
+    (
+      UserSettings as unknown as { cache: Map<string, string | null> }
+    ).cache.clear();
+  });
+
+  it("sets every default keybind action to Null so nothing stays bound", () => {
+    const s = new UserSettings();
+    s.unbindAllKeybinds(false);
+
+    const parsed = s.parsedUserKeybinds();
+    const defaults = getDefaultKeybinds(false);
+    expect(Object.keys(defaults).length).toBeGreaterThan(0);
+    for (const action of Object.keys(defaults)) {
+      expect(parsed[action]).toBe("Null");
+    }
+    // keybinds() drops "Null" entries, so no action resolves to a key.
+    expect(Object.keys(s.keybinds(false))).toHaveLength(0);
+  });
+});