diff --git a/packages/frontend/src/pages/debug.vue b/packages/frontend/src/pages/debug.vue
new file mode 100644
index 0000000000..4dae1b57a9
--- /dev/null
+++ b/packages/frontend/src/pages/debug.vue
@@ -0,0 +1,66 @@
+<!--
+SPDX-FileCopyrightText: syuilo and misskey-project
+SPDX-License-Identifier: AGPL-3.0-only
+-->
+
+<template>
+<PageWithHeader>
+	<div class="_spacer" style="--MI_SPACER-w: 600px;">
+		<div class="_gaps_m">
+			<MkResult v-if="resultType === 'empty'" type="empty"/>
+			<MkResult v-if="resultType === 'notFound'" type="notFound"/>
+			<MkResult v-if="resultType === 'error'" type="error"/>
+			<MkSelect
+				v-model="resultType" :items="[
+					{ label: 'empty', value: 'empty' },
+					{ label: 'notFound', value: 'notFound' },
+					{ label: 'error', value: 'error' },
+				]"
+			></MkSelect>
+
+			<MkSystemIcon v-if="iconType === 'info'" type="info" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'question'" type="question" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'success'" type="success" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'warn'" type="warn" style="width: 60px;"/>
+			<MkSystemIcon v-if="iconType === 'error'" type="error" style="width: 60px;"/>
+			<MkSelect
+				v-model="iconType" :items="[
+					{ label: 'info', value: 'info' },
+					{ label: 'question', value: 'question' },
+					{ label: 'success', value: 'success' },
+					{ label: 'warn', value: 'warn' },
+					{ label: 'error', value: 'error' },
+				]"
+			></MkSelect>
+
+			<div class="_buttons">
+				<MkButton @click="os.alert({ type: 'error', title: 'Error', text: 'error' })">Error</MkButton>
+				<MkButton @click="os.alert({ type: 'warning', title: 'Warning', text: 'warning' })">Warning</MkButton>
+				<MkButton @click="os.alert({ type: 'info', title: 'Info', text: 'info' })">Info</MkButton>
+				<MkButton @click="os.alert({ type: 'success', title: 'Success', text: 'success' })">Success</MkButton>
+				<MkButton @click="os.alert({ type: 'question', title: 'Question', text: 'question' })">Question</MkButton>
+			</div>
+		</div>
+	</div>
+</PageWithHeader>
+</template>
+
+<script lang="ts" setup>
+import { ref } from 'vue';
+import { i18n } from '@/i18n.js';
+import { instance } from '@/instance.js';
+import { definePage } from '@/page.js';
+import MkKeyValue from '@/components/MkKeyValue.vue';
+import MkLink from '@/components/MkLink.vue';
+import MkSelect from '@/components/MkSelect.vue';
+import MkButton from '@/components/MkButton.vue';
+import * as os from '@/os.js';
+
+const resultType = ref('empty');
+const iconType = ref('info');
+
+definePage(() => ({
+	title: 'DEBUG ROOM',
+	icon: 'ti ti-help-circle',
+}));
+</script>
diff --git a/packages/frontend/src/router.definition.ts b/packages/frontend/src/router.definition.ts
index 462b8e713f..5e0e6f7286 100644
--- a/packages/frontend/src/router.definition.ts
+++ b/packages/frontend/src/router.definition.ts
@@ -591,6 +591,10 @@ export const ROUTE_DEF = [{
 	path: '/reversi/g/:gameId',
 	component: page(() => import('@/pages/reversi/game.vue')),
 	loginRequired: false,
+}, {
+	path: '/debug',
+	component: page(() => import('@/pages/debug.vue')),
+	loginRequired: false,
 }, {
 	// テスト用リダイレクト設定。ログイン中ユーザのプロフィールにリダイレクトする
 	path: '/redirect-test',