diff --git a/public/locales/en-GB/app.json b/public/locales/en-GB/app.json
index acecfc4f..c3d26c4d 100644
--- a/public/locales/en-GB/app.json
+++ b/public/locales/en-GB/app.json
@@ -144,6 +144,7 @@
     "feedback_tab_title": "Feedback",
     "more_tab_title": "More",
     "opt_in_description": "<0></0><1></1>You may withdraw consent by unchecking this box. If you are currently in a call, this setting will take effect at the end of the call.",
+    "show_debug_view": "",
     "speaker_device_selection_label": "Speaker"
   },
   "star_rating_input_label_one": "{{count}} stars",
diff --git a/src/debug/DebugView.module.css b/src/debug/DebugView.module.css
new file mode 100644
index 00000000..bb371d1d
--- /dev/null
+++ b/src/debug/DebugView.module.css
@@ -0,0 +1,28 @@
+.container {
+  padding: 0.5em;
+  z-index: 2;
+  display: flex;
+}
+.dataContainer {
+  background-color: var(--cpd-color-bg-canvas-default);
+  border-radius: 10px;
+  overflow: auto;
+  width: 500px;
+}
+.hideButton {
+  background: none;
+  border: none;
+}
+.memberContainer {
+  background-color: var(--cpd-color-bg-subtle-secondary);
+  border-radius: 10px;
+  margin: 0.5em;
+  padding: 0.5em;
+}
+
+.encryptionEventContainer {
+  background-color: var(--cpd-color-bg-subtle-secondary);
+  border-radius: 10px;
+  margin: 0.5em;
+  padding: 0.5em;
+}
diff --git a/src/debug/DebugView.tsx b/src/debug/DebugView.tsx
new file mode 100644
index 00000000..16d40f11
--- /dev/null
+++ b/src/debug/DebugView.tsx
@@ -0,0 +1,102 @@
+/*
+Copyright 2024 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { MatrixRTCSession } from "matrix-js-sdk/src/matrixrtc/MatrixRTCSession";
+import { FC, useState } from "react";
+import { Text } from "@vector-im/compound-web";
+import { MatrixClient, MatrixEvent } from "matrix-js-sdk";
+import { CallMembership } from "matrix-js-sdk/src/matrixrtc/CallMembership";
+
+import styles from "./DebugView.module.css";
+
+interface Props {
+  rtcSession: MatrixRTCSession;
+  client: MatrixClient;
+}
+
+export const DebugView: FC<Props> = ({ rtcSession, client }) => {
+  const [isShown, setIsShown] = useState(true);
+  const room = rtcSession.room;
+  const events = room
+    .getLiveTimeline()
+    .getEvents()
+    .filter((ev) => ev.getType() === "io.element.call.encryption_keys")
+    .map((ev: MatrixEvent) => <EncryptionEventContainer event={ev} />);
+  const listItems = rtcSession.memberships.map((m) => (
+    <MemberContainer membership={m} />
+  ));
+  return (
+    <div className={styles.container}>
+      {isShown && (
+        <div className={styles.dataContainer}>
+          {listItems}
+          <ul>{events}</ul>
+        </div>
+      )}
+      <button
+        className={styles.hideButton}
+        onClick={() => setIsShown(!isShown)}
+      >
+        {isShown ? <b>{"<"}</b> : <b>{">"}</b>}
+      </button>
+    </div>
+  );
+};
+
+interface MemberContainerProps {
+  membership: CallMembership;
+}
+const MemberContainer: FC<MemberContainerProps> = ({ membership }) => {
+  return (
+    <div className={styles.memberContainer}>
+      <Text as="span" size="md" weight="semibold">
+        {membership.sender}
+      </Text>
+      <br />
+      <Text as="span" size="sm" weight="regular">
+        Device Id: {membership.deviceId}
+      </Text>
+    </div>
+  );
+};
+
+interface EncryptionEventContainerProps {
+  event: MatrixEvent;
+}
+const EncryptionEventContainer: FC<EncryptionEventContainerProps> = ({
+  event,
+}) => {
+  const keys = event
+    .getContent()
+    .keys.map((obj: { index: number; key: string }) => (
+      <>
+        index {obj.index}: {obj.key}
+        <br />
+      </>
+    ));
+  return (
+    <div className={styles.memberContainer}>
+      <Text as="span" size="md" weight="semibold">
+        {event.sender}
+      </Text>
+      <br />
+      <Text as="span" size="sm" weight="regular">
+        Keys: {keys}
+      </Text>
+      <br />
+    </div>
+  );
+};
diff --git a/src/livekit/MediaDevicesContext.tsx b/src/livekit/MediaDevicesContext.tsx
index 2f654946..ae548cad 100644
--- a/src/livekit/MediaDevicesContext.tsx
+++ b/src/livekit/MediaDevicesContext.tsx
@@ -143,7 +143,7 @@ export const MediaDevicesProvider: FC<Props> = ({ children }) => {
 
   // On FF we dont need to query the names
   // (call enumerateDevices + create meadia stream to trigger permissions)
-  // for ouput devices because the selector wont be shown on FF.
+  // for output devices because the selector wont be shown on FF.
   const useOutputNames = usingNames && !isFirefox();
 
   const [storedAudioInput, setStoredAudioInput] = useSetting(audioInputSetting);
@@ -166,8 +166,8 @@ export const MediaDevicesProvider: FC<Props> = ({ children }) => {
   }, [setStoredAudioInput, audioInput.selectedId]);
 
   useEffect(() => {
-    // Skip setting state for ff output. Redundent since it is set to always return 'undefined'
-    // but makes it clear while debugging that this is not happening on FF. + perf ;)
+    // Skip setting state for ff output. Redundant since it is set to always return 'undefined'
+    // but makes it clear while debugging that this is not happening on FF. (+ perf)
     if (audioOutput.selectedId !== undefined && !isFirefox())
       setStoredAudioOutput(audioOutput.selectedId);
   }, [setStoredAudioOutput, audioOutput.selectedId]);
diff --git a/src/livekit/useLiveKit.ts b/src/livekit/useLiveKit.ts
index 988dc0f8..faf7bc9f 100644
--- a/src/livekit/useLiveKit.ts
+++ b/src/livekit/useLiveKit.ts
@@ -235,7 +235,7 @@ export function useLiveKit(
           } catch (e) {
             if ((e as DOMException).name === "NotAllowedError") {
               logger.error(
-                "Fatal errror while syncing mute state: resetting",
+                "Fatal error while syncing mute state: resetting",
                 e,
               );
               if (type === MuteDevice.Microphone) {
diff --git a/src/room/InCallView.module.css b/src/room/InCallView.module.css
index cfc436c9..6891f621 100644
--- a/src/room/InCallView.module.css
+++ b/src/room/InCallView.module.css
@@ -23,6 +23,38 @@ limitations under the License.
   overflow-y: auto;
 }
 
+.debugViewContainer {
+  display: flex;
+  flex-direction: row;
+  height: 100%;
+  width: 100%;
+}
+
+.controlsOverlay {
+  position: relative;
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  overflow: auto;
+  overflow-inline: hidden;
+  /* There used to be a contain: strict here, but due to some bugs in Firefox,
+  this was causing the Z-ordering of modals to glitch out. It can be added back
+  if those issues appear to be resolved. */
+}
+
+.centerMessage {
+  display: flex;
+  flex: 1;
+  justify-content: center;
+  align-items: center;
+  flex-direction: column;
+}
+
+.centerMessage p {
+  display: block;
+  margin-bottom: 0;
+}
+
 .header {
   position: sticky;
   flex-shrink: 0;
diff --git a/src/room/InCallView.tsx b/src/room/InCallView.tsx
index 22b6be8c..f96bd9ba 100644
--- a/src/room/InCallView.tsx
+++ b/src/room/InCallView.tsx
@@ -87,6 +87,11 @@ import { makeOneOnOneLayout } from "../grid/OneOnOneLayout";
 import { makeSpotlightExpandedLayout } from "../grid/SpotlightExpandedLayout";
 import { makeSpotlightLandscapeLayout } from "../grid/SpotlightLandscapeLayout";
 import { makeSpotlightPortraitLayout } from "../grid/SpotlightPortraitLayout";
+import { DebugView } from "../debug/DebugView";
+import {
+  useSetting,
+  showDebugView as showDebugViewSetting,
+} from "../settings/settings";
 
 const canScreenshare = "getDisplayMedia" in (navigator.mediaDevices ?? {});
 
@@ -558,54 +563,62 @@ export const InCallView: FC<InCallViewProps> = ({
     );
   }
 
+  const [showDebugView] = useSetting(showDebugViewSetting);
+
   return (
-    <div
-      className={styles.inRoom}
-      ref={containerRef}
-      onTouchStart={onTouchStart}
-      onTouchEnd={onTouchEnd}
-      onTouchCancel={onTouchCancel}
-      onPointerMove={onPointerMove}
-      onPointerOut={onPointerOut}
-    >
-      {showHeader &&
-        (hideHeader ? (
-          // Cosmetic header to fill out space while still affecting the bounds
-          // of the grid
-          <div
-            className={classNames(styles.header, styles.filler)}
-            ref={headerRef}
-          />
-        ) : (
-          <Header className={styles.header} ref={headerRef}>
-            <LeftNav>
-              <RoomHeaderInfo
-                id={matrixInfo.roomId}
-                name={matrixInfo.roomName}
-                avatarUrl={matrixInfo.roomAvatar}
-                encrypted={matrixInfo.e2eeSystem.kind !== E2eeType.NONE}
-                participantCount={participantCount}
-              />
-            </LeftNav>
-            <RightNav>
-              {!reducedControls && showControls && onShareClick !== null && (
-                <InviteButton onClick={onShareClick} />
-              )}
-            </RightNav>
-          </Header>
-        ))}
-      <RoomAudioRenderer />
-      {renderContent()}
-      {footer}
-      {!noControls && <RageshakeRequestModal {...rageshakeRequestModalProps} />}
-      <SettingsModal
-        client={client}
-        roomId={rtcSession.room.roomId}
-        open={settingsModalOpen}
-        onDismiss={closeSettings}
-        tab={settingsTab}
-        onTabChange={setSettingsTab}
-      />
+    <div className={styles.debugViewContainer}>
+      {showDebugView && <DebugView rtcSession={rtcSession} client={client} />}
+
+      <div
+        className={styles.inRoom}
+        ref={containerRef}
+        onTouchStart={onTouchStart}
+        onTouchEnd={onTouchEnd}
+        onTouchCancel={onTouchCancel}
+        onPointerMove={onPointerMove}
+        onPointerOut={onPointerOut}
+      >
+        {showHeader &&
+          (hideHeader ? (
+            // Cosmetic header to fill out space while still affecting the bounds
+            // of the grid
+            <div
+              className={classNames(styles.header, styles.filler)}
+              ref={headerRef}
+            />
+          ) : (
+            <Header className={styles.header} ref={headerRef}>
+              <LeftNav>
+                <RoomHeaderInfo
+                  id={matrixInfo.roomId}
+                  name={matrixInfo.roomName}
+                  avatarUrl={matrixInfo.roomAvatar}
+                  encrypted={matrixInfo.e2eeSystem.kind !== E2eeType.NONE}
+                  participantCount={participantCount}
+                />
+              </LeftNav>
+              <RightNav>
+                {!reducedControls && showControls && onShareClick !== null && (
+                  <InviteButton onClick={onShareClick} />
+                )}
+              </RightNav>
+            </Header>
+          ))}
+        <RoomAudioRenderer />
+        {renderContent()}
+        {footer}
+        {!noControls && (
+          <RageshakeRequestModal {...rageshakeRequestModalProps} />
+        )}
+        <SettingsModal
+          client={client}
+          roomId={rtcSession.room.roomId}
+          open={settingsModalOpen}
+          onDismiss={closeSettings}
+          tab={settingsTab}
+          onTabChange={setSettingsTab}
+        />{" "}
+      </div>
     </div>
   );
 };
diff --git a/src/settings/SettingsModal.tsx b/src/settings/SettingsModal.tsx
index 6763cc5d..7d79f17c 100644
--- a/src/settings/SettingsModal.tsx
+++ b/src/settings/SettingsModal.tsx
@@ -45,6 +45,7 @@ import {
   optInAnalytics as optInAnalyticsSetting,
   developerSettingsTab as developerSettingsTabSetting,
   duplicateTiles as duplicateTilesSetting,
+  showDebugView as showDebugViewSetting,
 } from "./settings";
 import { isFirefox } from "../Platform";
 
@@ -83,6 +84,8 @@ export const SettingsModal: FC<Props> = ({
   );
   const [duplicateTiles, setDuplicateTiles] = useSetting(duplicateTilesSetting);
 
+  const [showDebugView, setShowDebugView] = useSetting(showDebugViewSetting);
+
   // Generate a `SelectInput` with a list of devices for a given device kind.
   const generateDeviceSelection = (
     devices: MediaDevice,
@@ -275,6 +278,20 @@ export const SettingsModal: FC<Props> = ({
           )}
         />
       </FieldRow>
+      <FieldRow>
+        <InputField
+          id="showDebugView"
+          type="checkbox"
+          label={t("settings.show_debug_view")}
+          checked={showDebugView}
+          onChange={useCallback(
+            (event: ChangeEvent<HTMLInputElement>): void => {
+              setShowDebugView(event.target.checked);
+            },
+            [setShowDebugView],
+          )}
+        />
+      </FieldRow>
     </TabItem>
   );
 
diff --git a/src/settings/settings.ts b/src/settings/settings.ts
index 9c181ccf..2cd6eda4 100644
--- a/src/settings/settings.ts
+++ b/src/settings/settings.ts
@@ -78,6 +78,8 @@ export const developerSettingsTab = new Setting(
 
 export const duplicateTiles = new Setting("duplicate-tiles", 0);
 
+export const showDebugView = new Setting("show-debug-view", false);
+
 export const audioInput = new Setting<string | undefined>(
   "audio-input",
   undefined,