diff --git a/src/main/config/appConfig.ts b/src/main/config/appConfig.ts
index fec1f2b..15b825d 100644
--- a/src/main/config/appConfig.ts
+++ b/src/main/config/appConfig.ts
@@ -14,6 +14,7 @@ const DEFAULT_PREFERENCES: AppPreferences = {
   accent: null,
   locale: DEFAULT_LOCALE,
   showDebugNav: false,
+  demoMode: false,
 };
 const DEFAULTS: StoredConfig = {
   gamePath: null,
@@ -30,6 +31,7 @@ function normalizePreferences(raw: Partial<AppPreferences> | undefined): AppPref
     accent: accent && /^#[\da-f]{6}$/i.test(accent) ? accent : null,
     locale: isAppLocale(locale) ? locale : DEFAULT_LOCALE,
     showDebugNav: raw?.showDebugNav === true,
+    demoMode: raw?.demoMode === true,
   };
 }
 
diff --git a/src/renderer/src/features/auth/AccountSwitcher.tsx b/src/renderer/src/features/auth/AccountSwitcher.tsx
index 4b9f32e..21b6e02 100644
--- a/src/renderer/src/features/auth/AccountSwitcher.tsx
+++ b/src/renderer/src/features/auth/AccountSwitcher.tsx
@@ -5,6 +5,8 @@ import { Avatar, StatusDot } from "../../components/ui";
 import { useSelf } from "../../store/social";
 import { statusMeta } from "../../lib/vrchat";
 import { api } from "../../lib/api";
+import { useDemoMode } from "../../lib/debugSettings";
+import { demoName } from "../../lib/demoMode";
 import type { UserStatus } from "../../../../shared/types/user";
 
 const STATUS_CHOICES: UserStatus[] = ["join me", "active", "ask me", "busy"];
@@ -15,12 +17,16 @@ const MENU_ROW =
 export function AccountSwitcher() {
   const { accounts, switchAccount, removeAccount, beginAddAccount, logout } = useAuth();
   const self = useSelf();
+  const demoMode = useDemoMode();
   const [open, setOpen] = useState(false);
   const [showAccounts, setShowAccounts] = useState(false);
 
   const active = accounts.accounts.find((a) => a.id === accounts.activeId);
   const others = accounts.accounts.filter((a) => a.id !== accounts.activeId);
   const status = self?.status ?? "offline";
+  const activeName = active ? (demoMode ? demoName(active.id) : active.displayName) : "Account";
+  const activeIcon = demoMode ? undefined : active?.userIcon;
+  const activeSub = demoMode ? statusMeta[status].label : self?.statusDescription || statusMeta[status].label;
 
   function close() {
     setOpen(false);
@@ -39,7 +45,7 @@ export function AccountSwitcher() {
         aria-expanded={open}
       >
         <span className="acct__current relative shrink-0 leading-[0]">
-          <Avatar src={active?.userIcon} name={active?.displayName} size={32} />
+          <Avatar src={activeIcon} name={activeName} size={32} />
           <StatusDot
             color={statusMeta[status].color}
             ring="var(--surface)"
@@ -49,10 +55,10 @@ export function AccountSwitcher() {
         </span>
         <span className="acct__current-text flex min-w-0 flex-1 flex-col">
           <span className="truncate text-left text-[13.5px] font-semibold leading-[1.25]">
-            {active?.displayName ?? "Account"}
+            {activeName}
           </span>
           <span className="truncate text-left text-[11px] font-medium text-faint">
-            {self?.statusDescription || statusMeta[status].label}
+            {activeSub}
           </span>
         </span>
         <span
@@ -73,31 +79,34 @@ export function AccountSwitcher() {
             <>
               <Separator />
               <div className="flex flex-col gap-px">
-                {others.map((a) => (
-                  <div
-                    key={a.id}
-                    className="group/row flex items-center rounded-sm transition-colors hover:bg-surface-2"
-                  >
-                    <button
-                      className="flex min-w-0 flex-1 items-center gap-2.5 px-2 py-[7px]"
-                      onClick={() => {
-                        void switchAccount(a.id);
-                        close();
-                      }}
+                {others.map((a) => {
+                  const name = demoMode ? demoName(a.id) : a.displayName;
+                  return (
+                    <div
+                      key={a.id}
+                      className="group/row flex items-center rounded-sm transition-colors hover:bg-surface-2"
                     >
-                      <Avatar src={a.userIcon} name={a.displayName} size={28} />
-                      <span className="truncate text-[13px] font-semibold">{a.displayName}</span>
-                    </button>
-                    <button
-                      className="grid w-[30px] shrink-0 self-stretch place-items-center rounded-sm text-faint opacity-0 transition-[opacity,color,background] duration-[var(--dur)] ease-[var(--ease)] hover:bg-[color-mix(in_srgb,var(--danger)_12%,transparent)] hover:text-danger group-hover/row:opacity-100"
-                      title="Remove account"
-                      aria-label={`Remove ${a.displayName}`}
-                      onClick={() => void removeAccount(a.id)}
-                    >
-                      <X size={15} />
-                    </button>
-                  </div>
-                ))}
+                      <button
+                        className="flex min-w-0 flex-1 items-center gap-2.5 px-2 py-[7px]"
+                        onClick={() => {
+                          void switchAccount(a.id);
+                          close();
+                        }}
+                      >
+                        <Avatar src={demoMode ? undefined : a.userIcon} name={name} size={28} />
+                        <span className="truncate text-[13px] font-semibold">{name}</span>
+                      </button>
+                      <button
+                        className="grid w-[30px] shrink-0 self-stretch place-items-center rounded-sm text-faint opacity-0 transition-[opacity,color,background] duration-[var(--dur)] ease-[var(--ease)] hover:bg-[color-mix(in_srgb,var(--danger)_12%,transparent)] hover:text-danger group-hover/row:opacity-100"
+                        title="Remove account"
+                        aria-label={`Remove ${name}`}
+                        onClick={() => void removeAccount(a.id)}
+                      >
+                        <X size={15} />
+                      </button>
+                    </div>
+                  );
+                })}
               </div>
             </>
           ) : null}
diff --git a/src/renderer/src/features/friends/FriendsSidebar.tsx b/src/renderer/src/features/friends/FriendsSidebar.tsx
index 2b6184d..953bfa3 100644
--- a/src/renderer/src/features/friends/FriendsSidebar.tsx
+++ b/src/renderer/src/features/friends/FriendsSidebar.tsx
@@ -6,6 +6,8 @@ import { useFriends, useSelf } from "../../store/social";
 import { useWorldName } from "../../store/worlds";
 import { parseLocation, type UserProfile } from "../../../../shared/types/user";
 import { useT } from "../../lib/i18n";
+import { useDemoMode } from "../../lib/debugSettings";
+import { anonymizeUserForDemo } from "../../lib/demoMode";
 import { useUserMenu } from "./useUserMenu";
 import { useFriendsGrouped } from "./useFriendsGrouped";
 
@@ -19,6 +21,7 @@ export function FriendsSidebar({ onOpen }: { onOpen: (id: string) => void }) {
   const t = useT();
   const friends = useFriends();
   const self = useSelf();
+  const demoMode = useDemoMode();
   const selfId = self?.id;
 
   const { online, offline, instances, alone } = useFriendsGrouped(friends, self);
@@ -40,8 +43,8 @@ export function FriendsSidebar({ onOpen }: { onOpen: (id: string) => void }) {
   const openContextMenu = useCallback((e: React.MouseEvent, friend: UserProfile) => {
     e.preventDefault();
     e.stopPropagation();
-    setContextMenu({ x: e.clientX, y: e.clientY, friend });
-  }, []);
+    setContextMenu({ x: e.clientX, y: e.clientY, friend: demoMode ? anonymizeUserForDemo(friend) : friend });
+  }, [demoMode]);
 
   return (
     <aside className="friendsbar flex h-full flex-col overflow-hidden border-l border-border bg-surface">
@@ -53,7 +56,7 @@ export function FriendsSidebar({ onOpen }: { onOpen: (id: string) => void }) {
       </header>
 
       <div className="flex-1 overflow-y-auto p-2">
-        {selfAlone ? <FriendRow friend={self} onOpen={onOpen} isSelf selfChrome /> : null}
+        {selfAlone ? <FriendRow friend={self} onOpen={onOpen} isSelf selfChrome demoMode={demoMode} /> : null}
 
         {friends.length === 0 ? (
           <p className="p-3 text-[13px] text-faint">{t("nav:friends.noFriendsOnline")}</p>
@@ -74,6 +77,7 @@ export function FriendsSidebar({ onOpen }: { onOpen: (id: string) => void }) {
                     onOpen={onOpen}
                     hideLocation
                     isSelf={f.id === selfId}
+                    demoMode={demoMode}
                     onContextMenu={f.id !== selfId ? openContextMenu : undefined}
                   />
                 ))}
@@ -92,6 +96,7 @@ export function FriendsSidebar({ onOpen }: { onOpen: (id: string) => void }) {
                     key={f.id}
                     friend={f}
                     onOpen={onOpen}
+                    demoMode={demoMode}
                     onContextMenu={openContextMenu}
                   />
                 ))}
@@ -111,6 +116,7 @@ export function FriendsSidebar({ onOpen }: { onOpen: (id: string) => void }) {
                     friend={f}
                     onOpen={onOpen}
                     dim
+                    demoMode={demoMode}
                     onContextMenu={openContextMenu}
                   />
                 ))}
@@ -199,6 +205,7 @@ function FriendRow({
   selfChrome,
   hideLocation,
   onContextMenu,
+  demoMode,
 }: {
   friend: UserProfile;
   onOpen: (id: string) => void;
@@ -207,20 +214,22 @@ function FriendRow({
   selfChrome?: boolean;
   hideLocation?: boolean;
   onContextMenu?: (e: React.MouseEvent, friend: UserProfile) => void;
+  demoMode?: boolean;
 }) {
   const t = useT();
-  const presence = presenceOf({ ...friend, isSelf });
-  const sub = friend.statusDescription || presence.effective.label;
-  const parsed = parseLocation(friend.location);
+  const displayFriend = demoMode ? anonymizeUserForDemo(friend) : friend;
+  const presence = presenceOf({ ...displayFriend, isSelf });
+  const sub = displayFriend.statusDescription || presence.effective.label;
+  const parsed = parseLocation(displayFriend.location);
   const worldName = useWorldName(parsed?.worldId);
   const location = parsed
     ? `${worldName ? `in ${worldName}` : t("nav:friends.inAWorld")} (#${parsed.instanceId})`
-    : locationLabel(friend.location);
+    : locationLabel(displayFriend.location);
   return (
     <button
       onClick={() => onOpen(isSelf ? "me" : friend.id)}
       onContextMenu={onContextMenu ? (e) => onContextMenu(e, friend) : undefined}
-      title={friend.displayName}
+      title={displayFriend.displayName}
       className={[
         "friend-row flex w-full items-center gap-2.5 rounded-md px-2 py-1.5 text-left transition-colors hover:bg-surface-2",
         dim ? "opacity-55 hover:opacity-100" : "",
@@ -229,13 +238,13 @@ function FriendRow({
           : "",
       ].join(" ")}
     >
-      <PresenceAvatar user={friend} size={32} />
+      <PresenceAvatar user={displayFriend} size={32} />
 
       <span className="friend-row__text flex min-w-0 flex-col">
         <span
           className={`flex min-w-0 items-center gap-1.5 text-[13.5px] ${isSelf ? "font-semibold" : "font-medium"}`}
         >
-          <span className="truncate">{friend.displayName}</span>
+          <span className="truncate">{displayFriend.displayName}</span>
           {isSelf ? <Badge tone="accent">You</Badge> : null}
         </span>
         <span className="truncate text-[12px] text-muted">{sub}</span>
diff --git a/src/renderer/src/features/profile/ProfileView.tsx b/src/renderer/src/features/profile/ProfileView.tsx
index 75aca48..73a9620 100644
--- a/src/renderer/src/features/profile/ProfileView.tsx
+++ b/src/renderer/src/features/profile/ProfileView.tsx
@@ -28,6 +28,8 @@ import {
   trustMeta,
 } from "../../lib/vrchat";
 import { useProfile } from "./useProfile";
+import { useDemoMode } from "../../lib/debugSettings";
+import { anonymizeUserForDemo } from "../../lib/demoMode";
 import { WorldsSection, FavoriteWorldsSection, WorldSearch } from "./WorldsSection";
 import { GroupsSection } from "./GroupsSection";
 import { LocationSection } from "./LocationSection";
@@ -48,22 +50,24 @@ export function ProfileView({ target }: { target: "me" | string }) {
 
 function ProfileCard({ profile }: { profile: UserProfile }) {
   const t = useT();
+  const demoMode = useDemoMode();
+  const displayProfile = demoMode ? anonymizeUserForDemo(profile) : profile;
   const [tab, setTab] = useViewState<TabId>(`profile:${profile.id}:tab`, "overview");
   const [menu, setMenu] = useState<{ x: number; y: number } | null>(null);
   const canAdd = !profile.isSelf && !profile.isFriend;
   const addFriend = useAddFriend(profile.id);
   const { buildItems, modal } = useUserMenu();
-  const trust = trustMeta[profile.trustRank];
-  const presence = presenceOf(profile);
+  const trust = trustMeta[displayProfile.trustRank];
+  const presence = presenceOf(displayProfile);
   const statusLabel =
-    !presence.online && profile.status !== "offline"
+    !presence.online && displayProfile.status !== "offline"
       ? t("profile:status.offlineWas", { status: presence.status.label })
       : presence.effective.label;
-  const avatar = avatarOf(profile);
-  const banner = bannerOf(profile);
-  const devLabel = profile.developerType ? developerLabels[profile.developerType] : undefined;
-  const bioLinks = (profile.bioLinks ?? []).filter(Boolean);
-  const showcasedBadges = (profile.badges ?? []).filter((b) => b.showcased);
+  const avatar = avatarOf(displayProfile);
+  const banner = bannerOf(displayProfile);
+  const devLabel = displayProfile.developerType ? developerLabels[displayProfile.developerType] : undefined;
+  const bioLinks = (displayProfile.bioLinks ?? []).filter(Boolean);
+  const showcasedBadges = (displayProfile.badges ?? []).filter((b) => b.showcased);
 
   return (
     <HeroHeader
@@ -72,7 +76,7 @@ function ProfileCard({ profile }: { profile: UserProfile }) {
       overlap={-72}
       media={
         <div className="profile__avatar" style={{ "--ring": trust.color } as React.CSSProperties}>
-          <Avatar src={avatar} name={profile.displayName} size={116} />
+          <Avatar src={avatar} name={displayProfile.displayName} size={116} />
           <span
             className="profile__status-dot"
             style={{ background: presence.color }}
@@ -83,21 +87,21 @@ function ProfileCard({ profile }: { profile: UserProfile }) {
       body={
         <div className="min-w-0 flex-1 pb-2">
           <div className="flex flex-wrap items-center gap-2.5">
-            <h2 className="text-[32px] font-bold tracking-[-0.6px]">{profile.displayName}</h2>
+            <h2 className="text-[32px] font-bold tracking-[-0.6px]">{displayProfile.displayName}</h2>
             {profile.isSelf ? <Tag color="var(--accent)">{t("profile:badge.you")}</Tag> : null}
             {profile.isFriend && !profile.isSelf ? (
               <Tag color="var(--status-join)">{t("profile:badge.friend")}</Tag>
             ) : null}
             {devLabel ? <Tag color="var(--accent)">{devLabel}</Tag> : null}
-            {profile.ageVerified ? (
+            {displayProfile.ageVerified ? (
               <Tag color="var(--trust-trusted)">{t("profile:badge.ageVerified")}</Tag>
             ) : null}
           </div>
           <div className="mt-2.5 flex flex-wrap items-center gap-3">
             <Tag color={trust.color}>{trust.label}</Tag>
             <PresenceLabel label={statusLabel} color={presence.color} />
-            {profile.pronouns ? (
-              <span className="text-[13px] text-muted">{profile.pronouns}</span>
+            {displayProfile.pronouns ? (
+              <span className="text-[13px] text-muted">{displayProfile.pronouns}</span>
             ) : null}
           </div>
           {showcasedBadges.length ? (
@@ -135,7 +139,7 @@ function ProfileCard({ profile }: { profile: UserProfile }) {
         ) : null
       }
     >
-      <LocationSection location={profile.location} />
+      <LocationSection location={displayProfile.location} />
 
         <Tabs
           tabs={[
@@ -150,22 +154,22 @@ function ProfileCard({ profile }: { profile: UserProfile }) {
 
         {tab === "overview" ? (
           <div className="flex flex-col gap-5 rise-in">
-            {profile.note ? (
+            {displayProfile.note ? (
               <Section title={t("profile:sections.note")}>
                 <p className="text-[14px] leading-relaxed whitespace-pre-wrap text-text">
-                  {profile.note}
+                  {displayProfile.note}
                 </p>
               </Section>
             ) : null}
 
-            {profile.statusDescription || profile.bio || bioLinks.length ? (
+            {displayProfile.statusDescription || displayProfile.bio || bioLinks.length ? (
               <Section title={t("profile:sections.about")}>
-                {profile.statusDescription ? (
-                  <p className="text-[15px] italic text-text">“{profile.statusDescription}”</p>
+                {displayProfile.statusDescription ? (
+                  <p className="text-[15px] italic text-text">“{displayProfile.statusDescription}”</p>
                 ) : null}
-                {profile.bio ? (
+                {displayProfile.bio ? (
                   <p className="text-[14px] leading-relaxed whitespace-pre-wrap text-muted">
-                    {profile.bio}
+                    {displayProfile.bio}
                   </p>
                 ) : null}
                 {bioLinks.length ? (
@@ -183,61 +187,61 @@ function ProfileCard({ profile }: { profile: UserProfile }) {
             <div className="grid grid-cols-1 items-start gap-5 lg:grid-cols-2">
               <Section title={t("profile:sections.details")}>
                 <dl className="grid grid-cols-2 gap-x-6 gap-y-3">
-                  {profile.dateJoined ? (
+                  {displayProfile.dateJoined ? (
                     <Fact
                       label={t("profile:facts.joined")}
-                      value={formatDate(profile.dateJoined)}
+                      value={formatDate(displayProfile.dateJoined)}
                     />
                   ) : null}
-                  {profile.lastLogin ? (
+                  {displayProfile.lastLogin ? (
                     <Fact
                       label={t("profile:facts.lastLogin")}
-                      value={formatDateTime(profile.lastLogin)}
+                      value={formatDateTime(displayProfile.lastLogin)}
                     />
                   ) : null}
-                  {profile.lastActivity ? (
+                  {displayProfile.lastActivity ? (
                     <Fact
                       label={t("profile:facts.lastActivity")}
-                      value={formatDateTime(profile.lastActivity)}
+                      value={formatDateTime(displayProfile.lastActivity)}
                     />
                   ) : null}
-                  {profile.lastPlatform ? (
+                  {displayProfile.lastPlatform ? (
                     <Fact
                       label={t("profile:facts.platform")}
-                      value={platformLabel(profile.lastPlatform)}
+                      value={platformLabel(displayProfile.lastPlatform)}
                     />
                   ) : null}
-                  {profile.state ? (
-                    <Fact label={t("profile:facts.state")} value={stateLabel(profile.state, t)} />
+                  {displayProfile.state ? (
+                    <Fact label={t("profile:facts.state")} value={stateLabel(displayProfile.state, t)} />
                   ) : null}
-                  <Fact label={t("profile:facts.userId")} value={profile.id} mono />
+                  {demoMode ? null : <Fact label={t("profile:facts.userId")} value={profile.id} mono />}
                 </dl>
               </Section>
 
-              {profile.languages?.length ? (
+              {displayProfile.languages?.length ? (
                 <Section title={t("profile:sections.languages")}>
                   <div className="flex flex-wrap gap-1.5">
-                    {profile.languages.map((code) => (
+                    {displayProfile.languages.map((code) => (
                       <Tag key={code}>{languageLabel(code)}</Tag>
                     ))}
                   </div>
                 </Section>
               ) : null}
 
-              {profile.currentAvatarTags?.length ? (
+              {displayProfile.currentAvatarTags?.length ? (
                 <Section title={t("profile:sections.avatarTags")}>
                   <div className="flex flex-wrap gap-1.5">
-                    {profile.currentAvatarTags.map((t) => (
+                    {displayProfile.currentAvatarTags.map((t) => (
                       <Tag key={t}>{prettyTag(t, "content_")}</Tag>
                     ))}
                   </div>
                 </Section>
               ) : null}
 
-              {profile.badges?.length ? (
+              {displayProfile.badges?.length ? (
                 <Section title={t("profile:sections.badges")}>
                   <div className="flex flex-wrap gap-2.5">
-                    {[...profile.badges]
+                    {[...displayProfile.badges]
                       .sort((a, b) => Number(b.showcased) - Number(a.showcased))
                       .map((b) => (
                         <div
@@ -260,10 +264,10 @@ function ProfileCard({ profile }: { profile: UserProfile }) {
               ) : null}
             </div>
 
-            {profile.pastDisplayNames?.length ? (
+            {displayProfile.pastDisplayNames?.length ? (
               <Section title={t("profile:sections.formerNames")} collapsible>
                 <div className="flex flex-wrap gap-2">
-                  {profile.pastDisplayNames.map((p) => (
+                  {displayProfile.pastDisplayNames.map((p) => (
                     <span
                       key={`${p.displayName}-${p.updatedAt}`}
                       className="rounded-lg border border-border bg-surface px-2.5 py-1 text-[13px] text-text"
@@ -309,7 +313,7 @@ function ProfileCard({ profile }: { profile: UserProfile }) {
         <ContextMenu
           x={menu.x}
           y={menu.y}
-          items={buildItems(profile)}
+          items={buildItems(displayProfile)}
           onClose={() => setMenu(null)}
         />
       ) : null}
diff --git a/src/renderer/src/features/settings/SettingsView.tsx b/src/renderer/src/features/settings/SettingsView.tsx
index bf2573a..417a153 100644
--- a/src/renderer/src/features/settings/SettingsView.tsx
+++ b/src/renderer/src/features/settings/SettingsView.tsx
@@ -27,7 +27,12 @@ import type { AppConfig, PreferredRegion, RegionPing } from "../../../../shared/
 import type { UnityStatus } from "../../../../shared/types/unity";
 import { api, errorMessage } from "../../lib/api";
 import { useAsync } from "../../lib/useAsync";
-import { useSetDebugNavVisible, useDebugNavVisible } from "../../lib/debugSettings";
+import {
+  useDemoMode,
+  useSetDemoMode,
+  useSetDebugNavVisible,
+  useDebugNavVisible,
+} from "../../lib/debugSettings";
 import { useAppConfig } from "../../lib/AppConfigContext";
 import { regionFlag, regionLabel } from "../../lib/vrchat";
 import {
@@ -107,6 +112,8 @@ function DebugSection() {
   const { t } = useI18n();
   const showDebugNav = useDebugNavVisible();
   const setDebugNavVisible = useSetDebugNavVisible();
+  const demoMode = useDemoMode();
+  const setDemoMode = useSetDemoMode();
   return (
     <Section
       title={t("settings:debug.title")}
@@ -120,6 +127,13 @@ function DebugSection() {
         </div>
         <Toggle checked={showDebugNav} onChange={setDebugNavVisible} />
       </div>
+      <div className="mt-3 flex items-center justify-between gap-4 rounded-lg border border-border bg-surface-2 p-3">
+        <div>
+          <div className="text-[13px] font-semibold text-text">{t("settings:debug.demoMode")}</div>
+          <div className="mt-0.5 text-[12px] text-muted">{t("settings:debug.demoModeHint")}</div>
+        </div>
+        <Toggle checked={demoMode} onChange={setDemoMode} />
+      </div>
     </Section>
   );
 }
diff --git a/src/renderer/src/lib/debugSettings.ts b/src/renderer/src/lib/debugSettings.ts
index 35412ea..6385ecf 100644
--- a/src/renderer/src/lib/debugSettings.ts
+++ b/src/renderer/src/lib/debugSettings.ts
@@ -5,6 +5,10 @@ export function useDebugNavVisible(): boolean {
   return useAppConfig().config?.preferences.showDebugNav ?? false;
 }
 
+export function useDemoMode(): boolean {
+  return useAppConfig().config?.preferences.demoMode ?? false;
+}
+
 export function useSetDebugNavVisible(): (visible: boolean) => void {
   const { setPreferences } = useAppConfig();
   return useCallback(
@@ -14,3 +18,13 @@ export function useSetDebugNavVisible(): (visible: boolean) => void {
     [setPreferences],
   );
 }
+
+export function useSetDemoMode(): (enabled: boolean) => void {
+  const { setPreferences } = useAppConfig();
+  return useCallback(
+    (enabled: boolean) => {
+      void setPreferences({ demoMode: enabled });
+    },
+    [setPreferences],
+  );
+}
diff --git a/src/renderer/src/lib/demoMode.ts b/src/renderer/src/lib/demoMode.ts
new file mode 100644
index 0000000..dcae543
--- /dev/null
+++ b/src/renderer/src/lib/demoMode.ts
@@ -0,0 +1,64 @@
+import type { UserProfile } from "../../../shared/types/user";
+
+const GIVEN = [
+  "Aoi",
+  "Hana",
+  "Haruka",
+  "Hikari",
+  "Kaede",
+  "Koharu",
+  "Mika",
+  "Natsuki",
+  "Ren",
+  "Rin",
+  "Sora",
+  "Yui",
+];
+const FAMILY = [
+  "Amamiya",
+  "Fujimoto",
+  "Hoshino",
+  "Kisaragi",
+  "Kobayashi",
+  "Minazuki",
+  "Mizuno",
+  "Sakuraba",
+  "Shirakawa",
+  "Tachibana",
+  "Tsukino",
+  "Yamabuki",
+];
+
+function hashId(id: string): number {
+  let hash = 2166136261;
+  for (let i = 0; i < id.length; i++) {
+    hash ^= id.charCodeAt(i);
+    hash = Math.imul(hash, 16777619);
+  }
+  return hash >>> 0;
+}
+
+export function demoName(id: string): string {
+  const hash = hashId(id);
+  return `${FAMILY[hash % FAMILY.length]} ${GIVEN[(hash >>> 4) % GIVEN.length]}`;
+}
+
+export function anonymizeUserForDemo(user: UserProfile): UserProfile {
+  return {
+    ...user,
+    displayName: demoName(user.id),
+    bio: "",
+    bioLinks: [],
+    statusDescription: "",
+    userIcon: "",
+    profilePicOverride: "",
+    profilePicOverrideThumbnail: "",
+    currentAvatarImageUrl: "",
+    currentAvatarThumbnailImageUrl: "",
+    location: user.location === "offline" ? "offline" : "private",
+    note: undefined,
+    pronouns: undefined,
+    pastDisplayNames: [],
+    badges: [],
+  };
+}
diff --git a/src/renderer/src/lib/i18n/locales/en/settings.json b/src/renderer/src/lib/i18n/locales/en/settings.json
index 7f44059..35f1eae 100644
--- a/src/renderer/src/lib/i18n/locales/en/settings.json
+++ b/src/renderer/src/lib/i18n/locales/en/settings.json
@@ -88,7 +88,9 @@
     "title": "Debug",
     "description": "Developer and troubleshooting options.",
     "sidebar": "Show Debug in the sidebar",
-    "sidebarHint": "Adds the Debug shortcut back to the left navigation."
+    "sidebarHint": "Adds the Debug shortcut back to the left navigation.",
+    "demoMode": "Demo mode",
+    "demoModeHint": "Anonymize user-facing details for screenshots."
   },
   "region": {
     "title": "Instance Region",
diff --git a/src/renderer/src/lib/i18n/locales/ja/settings.json b/src/renderer/src/lib/i18n/locales/ja/settings.json
index 43bb05a..fc29d1d 100644
--- a/src/renderer/src/lib/i18n/locales/ja/settings.json
+++ b/src/renderer/src/lib/i18n/locales/ja/settings.json
@@ -88,7 +88,9 @@
     "title": "デバッグ",
     "description": "開発者向けとトラブルシューティング用の設定です。",
     "sidebar": "サイドバーにデバッグを表示",
-    "sidebarHint": "左のナビゲーションにデバッグのショートカットを表示します。"
+    "sidebarHint": "左のナビゲーションにデバッグのショートカットを表示します。",
+    "demoMode": "デモモード",
+    "demoModeHint": "スクリーンショット用にユーザー情報を匿名化します。"
   },
   "region": {
     "title": "インスタンスのリージョン",
diff --git a/src/renderer/src/lib/i18n/locales/th/settings.json b/src/renderer/src/lib/i18n/locales/th/settings.json
index 79bbc30..d054ef2 100644
--- a/src/renderer/src/lib/i18n/locales/th/settings.json
+++ b/src/renderer/src/lib/i18n/locales/th/settings.json
@@ -88,7 +88,9 @@
     "title": "ดีบัก",
     "description": "ตัวเลือกสำหรับนักพัฒนาและการแก้ปัญหา",
     "sidebar": "แสดงดีบักในแถบด้านข้าง",
-    "sidebarHint": "เพิ่มทางลัดดีบักกลับไปที่เมนูนำทางด้านซ้าย"
+    "sidebarHint": "เพิ่มทางลัดดีบักกลับไปที่เมนูนำทางด้านซ้าย",
+    "demoMode": "โหมดเดโม",
+    "demoModeHint": "ซ่อนข้อมูลผู้ใช้สำหรับภาพหน้าจอ"
   },
   "region": {
     "title": "ภูมิภาคของอินสแตนซ์",
diff --git a/src/shared/types/appConfig.ts b/src/shared/types/appConfig.ts
index efbc010..2616a32 100644
--- a/src/shared/types/appConfig.ts
+++ b/src/shared/types/appConfig.ts
@@ -9,6 +9,7 @@ export interface AppPreferences {
   accent: string | null;
   locale: AppLocale;
   showDebugNav: boolean;
+  demoMode: boolean;
 }
 
 export interface AppConfig {