diff --git a/apps/app-frontend/src/components/ui/library/instance-group/index.vue b/apps/app-frontend/src/components/ui/library/instance-group/index.vue
index 4a179654b8..91bb6e41e2 100644
--- a/apps/app-frontend/src/components/ui/library/instance-group/index.vue
+++ b/apps/app-frontend/src/components/ui/library/instance-group/index.vue
@@ -30,6 +30,7 @@ import type {
 } from '@/components/ui/library/use-library'
 import { useLibrary } from '@/components/ui/library/use-library'
 import { FAVORITES_GROUP_ID, MAX_INSTANCE_GROUP_NAME_LENGTH } from '@/helpers/instance-groups'
+import { useTheming } from '@/store/state'
 
 const INSTANCE_GRID_OBSERVER_ACTIVATION_DELAY = 500
 
@@ -48,6 +49,8 @@ const props = withDefaults(
 )
 
 const { formatMessage } = useVIntl()
+const themeStore = useTheming()
+const compactMode = computed(() => themeStore.getFeatureFlag('compact_instance_cards'))
 const { addNotification } = injectNotificationManager()
 const {
 	isSectionCollapsed,
@@ -475,7 +478,12 @@ onMounted(startInstanceGridResizeObserver)
 				<div ref="instanceGridContent">
 					<TransitionGroup
 						tag="section"
-						class="grid min-h-[45px] w-full grid-cols-[repeat(auto-fill,minmax(min(10rem,100%),1fr))] max-xl:grid-cols-[repeat(auto-fill,minmax(min(8rem,100%),1fr))] gap-3 overflow-y-auto scroll-smooth"
+						class="grid min-h-[45px] w-full gap-3 overflow-y-auto scroll-smooth"
+						:class="
+							compactMode
+								? 'grid-cols-[repeat(auto-fill,minmax(min(15rem,100%),1fr))]'
+								: 'grid-cols-[repeat(auto-fill,minmax(min(10rem,100%),1fr))] max-xl:grid-cols-[repeat(auto-fill,minmax(min(8rem,100%),1fr))]'
+						"
 						move-class="transition-transform duration-200 ease-out motion-reduce:transition-none"
 						enter-active-class="transition-[opacity,transform] duration-[150ms] ease-out motion-reduce:transition-none"
 						enter-from-class="opacity-0"
diff --git a/apps/app-frontend/src/components/ui/library/instance-group/instance-card-view.vue b/apps/app-frontend/src/components/ui/library/instance-group/instance-card-view.vue
index 3569492d76..4f1b373ccb 100644
--- a/apps/app-frontend/src/components/ui/library/instance-group/instance-card-view.vue
+++ b/apps/app-frontend/src/components/ui/library/instance-group/instance-card-view.vue
@@ -4,6 +4,7 @@ import { computed, ref } from 'vue'
 
 import { getInstanceIconUrl } from '@/helpers/instance'
 import type { GameInstance } from '@/helpers/types'
+import { useTheming } from '@/store/state'
 
 const props = withDefaults(
 	defineProps<{
@@ -16,6 +17,8 @@ const props = withDefaults(
 )
 
 const iconSrc = computed(() => getInstanceIconUrl(props.instance.icon_path))
+const themeStore = useTheming()
+const compactMode = computed(() => themeStore.getFeatureFlag('compact_instance_cards'))
 
 const nameRef = ref<HTMLElement | null>(null)
 const versionRef = ref<HTMLElement | null>(null)
@@ -23,30 +26,40 @@ const versionRef = ref<HTMLElement | null>(null)
 
 <template>
 	<div
-		class="relative flex w-full min-w-0 select-none flex-col items-start justify-end gap-3 overflow-clip rounded-[20px] border border-solid bg-surface-3 p-3 text-left transition-all"
+		class="relative flex w-full min-w-0 select-none overflow-clip border border-solid bg-surface-3 text-left transition-all"
 		:class="{
+			'flex-row items-center justify-start gap-2.5 rounded-xl p-2.5': compactMode,
+			'flex-col items-start justify-end gap-3 rounded-[20px] p-3': !compactMode,
 			'[border-color:color-mix(in_srgb,var(--color-text-primary)_40%,transparent)] brightness-110':
 				selected,
 			'border-surface-4': !selected,
 		}"
 	>
 		<div
-			class="relative flex aspect-square min-w-full shrink-0 items-center overflow-clip rounded-2xl"
+			class="relative flex shrink-0 items-center overflow-clip"
+			:class="compactMode ? 'size-10 rounded-lg' : 'aspect-square min-w-full rounded-2xl'"
 		>
 			<Avatar
-				class="pointer-events-none !rounded-2xl outline-none"
+				class="pointer-events-none outline-none"
+				:class="compactMode ? '!rounded-lg' : '!rounded-2xl'"
 				size="100%"
 				:src="iconSrc"
 				:tint-by="instance.id"
 				alt=""
 				no-shadow
 			/>
-			<slot name="loading" />
-			<div class="absolute bottom-1.5 right-1.5 z-[1] flex size-12 items-center justify-center">
-				<slot name="leading" />
+			<slot name="loading" :compact="compactMode" />
+			<div
+				class="absolute z-[1] flex items-center justify-center"
+				:class="compactMode ? 'inset-0' : 'bottom-1.5 right-1.5 size-12'"
+			>
+				<slot name="leading" :compact="compactMode" />
 			</div>
 		</div>
-		<div class="flex min-w-0 w-full flex-col items-start justify-center gap-1 px-0.5">
+		<div
+			class="flex min-w-0 w-full flex-col items-start justify-center gap-1 px-0.5"
+			:class="{ 'pr-10': compactMode }"
+		>
 			<p
 				ref="nameRef"
 				v-tooltip="truncatedTooltip(nameRef, instance.name)"
@@ -62,6 +75,6 @@ const versionRef = ref<HTMLElement | null>(null)
 				{{ instance.loader }} {{ instance.game_version }}
 			</p>
 		</div>
-		<slot name="overlay" />
+		<slot name="overlay" :compact="compactMode" />
 	</div>
 </template>
diff --git a/apps/app-frontend/src/components/ui/library/instance-group/instance-card.vue b/apps/app-frontend/src/components/ui/library/instance-group/instance-card.vue
index 814cab72b4..1c223f9e36 100644
--- a/apps/app-frontend/src/components/ui/library/instance-group/instance-card.vue
+++ b/apps/app-frontend/src/components/ui/library/instance-group/instance-card.vue
@@ -285,7 +285,7 @@ onMounted(() => {
 		@mouseenter="checkProcess"
 		@pointerdown="handlePointerDown"
 	>
-		<template #loading>
+		<template #loading="{ compact }">
 			<div
 				v-if="loadingIndicatorVisible"
 				class="pointer-events-none absolute inset-0 z-[1] flex items-center justify-center"
@@ -293,13 +293,17 @@ onMounted(() => {
 				<div class="absolute inset-0 bg-surface-1 opacity-30" />
 				<SpinnerIcon
 					v-tooltip="formatMessage(modLoading ? messages.loading : messages.installing)"
-					class="relative size-[30%] animate-spin text-contrast"
+					class="relative animate-spin text-contrast"
+					:class="compact ? 'size-5' : 'size-[30%]'"
 					tabindex="-1"
 				/>
 			</div>
 		</template>
-		<template #leading>
-			<div class="relative flex size-12 shrink-0 items-center justify-center">
+		<template #leading="{ compact }">
+			<div
+				class="relative flex shrink-0 items-center justify-center"
+				:class="compact ? 'size-10' : 'size-12'"
+			>
 				<div class="absolute inset-0 flex items-center justify-center">
 					<IconButton
 						v-if="playing"
@@ -307,7 +311,7 @@ onMounted(() => {
 						:label="formatMessage(messages.stop)"
 						type="colored"
 						color="red"
-						size="lg"
+						:size="compact ? 'md' : 'lg'"
 						@click="(e) => stop(e, 'InstanceCard')"
 						@mouseenter="checkProcess"
 					>
@@ -325,7 +329,7 @@ onMounted(() => {
 						:label="formatMessage(messages.repair)"
 						type="colored"
 						color="brand"
-						size="lg"
+						:size="compact ? 'md' : 'lg'"
 						class="origin-bottom scale-75 opacity-0 transition-opacity group-hover/card:scale-100 group-hover/card:opacity-100"
 						@click="(e) => repair(e)"
 					>
@@ -342,7 +346,7 @@ onMounted(() => {
 						:label="formatMessage(messages.play)"
 						type="colored"
 						color="brand"
-						size="lg"
+						:size="compact ? 'md' : 'lg'"
 						class="origin-bottom scale-75 opacity-0 transition-opacity group-hover/card:scale-100 group-hover/card:opacity-100"
 						@click="(e) => play(e, 'InstanceCard')"
 						@mouseenter="checkProcess"
@@ -352,10 +356,11 @@ onMounted(() => {
 				</div>
 			</div>
 		</template>
-		<template #overlay>
+		<template #overlay="{ compact }">
 			<button
 				type="button"
-				class="selection-button group/selection absolute right-2 top-1.5 z-[2] flex size-[50px] cursor-pointer items-start pt-4 justify-center border-0 bg-transparent p-0"
+				class="selection-button group/selection absolute z-[2] flex size-[50px] cursor-pointer items-start pt-4 justify-center border-0 bg-transparent p-0"
+				:class="compact ? '-right-1 -top-1' : 'right-2 top-1.5'"
 				:aria-label="formatMessage(selected ? messages.deselect : messages.select)"
 				:aria-pressed="selected"
 				@click.stop="toggleSelection"
diff --git a/apps/app-frontend/src/components/ui/settings/display/BehaviorSettings.vue b/apps/app-frontend/src/components/ui/settings/display/BehaviorSettings.vue
index 80de14a718..d0d4030330 100644
--- a/apps/app-frontend/src/components/ui/settings/display/BehaviorSettings.vue
+++ b/apps/app-frontend/src/components/ui/settings/display/BehaviorSettings.vue
@@ -10,6 +10,7 @@ const themeStore = useTheming()
 const { formatMessage } = useVIntl()
 
 const worldsInHomeFlag: FeatureFlag = 'worlds_in_home'
+const compactInstanceCardsFlag: FeatureFlag = 'compact_instance_cards'
 const skipNonEssentialWarningsFlag: FeatureFlag = 'skip_non_essential_warnings'
 const skipUnknownPackWarningFlag: FeatureFlag = 'skip_unknown_pack_warning'
 const showPlayTimeFlag: FeatureFlag = 'show_instance_play_time'
@@ -60,6 +61,14 @@ const messages = defineMessages({
 		defaultMessage:
 			'Show recently played worlds or instances in the "Jump in" section on the Home page.',
 	},
+	compactModeTitle: {
+		id: 'app.appearance-settings.compact-mode.title',
+		defaultMessage: 'Compact mode',
+	},
+	compactModeDescription: {
+		id: 'app.appearance-settings.compact-mode.description',
+		defaultMessage: 'Display library instances in a compact row layout.',
+	},
 	showPlayTimeTitle: {
 		id: 'app.appearance-settings.show-play-time.title',
 		defaultMessage: 'Show play time',
@@ -172,6 +181,26 @@ watch(
 				/>
 			</div>
 
+			<div class="flex items-center justify-between gap-4">
+				<div>
+					<h3 class="m-0 text-lg font-semibold text-contrast">
+						{{ formatMessage(messages.compactModeTitle) }}
+					</h3>
+					<p class="m-0 mt-1">{{ formatMessage(messages.compactModeDescription) }}</p>
+				</div>
+				<Toggle
+					id="compact-mode"
+					:model-value="themeStore.getFeatureFlag(compactInstanceCardsFlag)"
+					@update:model-value="
+						() => {
+							const newValue = !themeStore.getFeatureFlag(compactInstanceCardsFlag)
+							themeStore.featureFlags[compactInstanceCardsFlag] = newValue
+							settings.feature_flags[compactInstanceCardsFlag] = newValue
+						}
+					"
+				/>
+			</div>
+
 			<div class="flex items-center justify-between gap-4">
 				<div>
 					<h3 class="m-0 text-lg font-semibold text-contrast">
diff --git a/apps/app-frontend/src/store/theme.ts b/apps/app-frontend/src/store/theme.ts
index 8e0fe8f2b7..59d0ea6a3a 100644
--- a/apps/app-frontend/src/store/theme.ts
+++ b/apps/app-frontend/src/store/theme.ts
@@ -15,6 +15,7 @@ export const DEFAULT_FEATURE_FLAGS = {
 	pride_fundraiser: true,
 	i18n_debug: false,
 	show_instance_play_time: true,
+	compact_instance_cards: false,
 	advanced_filters_collapsed: true,
 	always_show_copy_details: false,
 	hide_installed_modpacks: false,
diff --git a/packages/app-lib/src/state/settings.rs b/packages/app-lib/src/state/settings.rs
index 6f64fc7108..7411121a7a 100644
--- a/packages/app-lib/src/state/settings.rs
+++ b/packages/app-lib/src/state/settings.rs
@@ -60,6 +60,7 @@ pub enum FeatureFlag {
     ServerProjectQa,
     I18nDebug,
     ShowInstancePlayTime,
+    CompactInstanceCards,
     SkipNonEssentialWarnings,
     AdvancedFiltersCollapsed,
     AlwaysShowCopyDetails,