diff --git a/apps/app-frontend/src/pages/instance/share/index.vue b/apps/app-frontend/src/pages/instance/share/index.vue
index 65b0f96910..a78d0e8242 100644
--- a/apps/app-frontend/src/pages/instance/share/index.vue
+++ b/apps/app-frontend/src/pages/instance/share/index.vue
@@ -9,9 +9,19 @@
 			:link="inviteLink.link.value"
 			:link-expires-at="inviteLink.details.value?.expiresAt"
 			:link-max-uses="inviteLink.details.value?.maxUses"
+			:link-max-uses-limit="remainingUserSlots"
 			:update-invite-link="inviteLink.update"
 			:user-profile-link="userProfileLink"
-			:can-invite="!members.exclusiveMutationPending.value && !inviteLink.pending.value"
+			:can-invite="
+				hasRemainingUserSlots &&
+				!members.exclusiveMutationPending.value &&
+				!inviteLink.pending.value
+			"
+			:invite-disabled-message="
+				hasRemainingUserSlots
+					? undefined
+					: formatMessage(messages.userLimitReached, { limit: SHARED_INSTANCE_USER_LIMIT })
+			"
 			@invite="invitePlayer"
 			@cancel="cancelInvite"
 		/>
@@ -41,6 +51,7 @@
 			v-if="members.rows.value.length > 0"
 			:rows="members.rows.value"
 			:actions-locked="sharedInstanceActionsLocked"
+			:invite-disabled="!hasRemainingUserSlots"
 			:invite-pending="inviteLink.pending.value"
 			:push-update-disabled="
 				instance.install_stage !== 'installed' || publishState !== 'idle' || !!offline
@@ -107,7 +118,7 @@
 				<ButtonStyled color="brand"
 					><button
 						class="!h-10"
-						:disabled="inviteLink.pending.value"
+						:disabled="inviteLink.pending.value || !hasRemainingUserSlots"
 						@click="showInvitePlayers($event)"
 					>
 						<SpinnerIcon
@@ -160,7 +171,7 @@ import { injectSharedInstanceState } from '../use-shared-instance-state'
 import SharedInstanceMembersTable from './shared-instance-members-table.vue'
 import SharedInstanceRemoveMemberModal from './shared-instance-remove-member-modal.vue'
 import SharedInstanceShareEmptyState from './shared-instance-share-empty-state.vue'
-import type { ShareRow } from './shared-instance-share-types'
+import { SHARED_INSTANCE_USER_LIMIT, type ShareRow } from './shared-instance-share-types'
 import { useSharedInstanceInviteCandidates } from './use-shared-instance-invite-candidates'
 import { useSharedInstanceInviteLink } from './use-shared-instance-invite-link'
 import { useSharedInstanceMembers } from './use-shared-instance-members'
@@ -210,6 +221,10 @@ const members = useSharedInstanceMembers({
 	actionsLocked,
 	onError: notifyOperationError,
 })
+const remainingUserSlots = computed(() =>
+	Math.max(0, SHARED_INSTANCE_USER_LIMIT - members.rows.value.length),
+)
+const hasRemainingUserSlots = computed(() => remainingUserSlots.value > 0)
 const {
 	inviteFriends,
 	search: searchInviteUsers,
@@ -222,6 +237,7 @@ const {
 })
 const inviteLink = useSharedInstanceInviteLink(
 	computed(() => props.instance.id),
+	remainingUserSlots,
 	notifyOperationError,
 )
 
@@ -266,6 +282,10 @@ const messages = defineMessages({
 		id: 'app.instance.share.empty.invite-friends-button',
 		defaultMessage: 'Invite friends',
 	},
+	userLimitReached: {
+		id: 'app.instance.share.invite-modal.user-limit-reached',
+		defaultMessage: 'This instance has reached the {limit}-user limit.',
+	},
 	shareModalHeader: {
 		id: 'app.instance.share.invite-modal.heading',
 		defaultMessage: 'Share {name}',
@@ -305,7 +325,7 @@ const messages = defineMessages({
 })
 
 function invitePlayer(payload: InvitePlayersInvitePayload) {
-	if (actionsLocked.value) return
+	if (actionsLocked.value || !hasRemainingUserSlots.value) return
 	if (payload.source === 'search') void requestFriend(payload.user)
 	members.invite(payload.user)
 }
@@ -316,6 +336,7 @@ function cancelInvite(user: InvitePlayersUser) {
 async function showInvitePlayers(event?: MouseEvent) {
 	if (actionsLocked.value) return
 	if (!isSignedIn.value) return signInToShare(event)
+	if (!hasRemainingUserSlots.value) return
 	if (requiresUnlink.value) return unlinkModal.value?.show()
 	if (await inviteLink.ensure()) invitePlayersModal.value?.show(event)
 }
diff --git a/apps/app-frontend/src/pages/instance/share/shared-instance-members-table.vue b/apps/app-frontend/src/pages/instance/share/shared-instance-members-table.vue
index 1dc637e21c..77e32496fe 100644
--- a/apps/app-frontend/src/pages/instance/share/shared-instance-members-table.vue
+++ b/apps/app-frontend/src/pages/instance/share/shared-instance-members-table.vue
@@ -25,7 +25,7 @@
 					<ButtonStyled color="brand">
 						<button
 							class="flex !h-10 shrink-0 items-center gap-2"
-							:disabled="invitePending"
+							:disabled="invitePending || inviteDisabled"
 							@click="emit('invite', $event)"
 						>
 							<SpinnerIcon v-if="invitePending" class="animate-spin" aria-hidden="true" />
@@ -171,6 +171,7 @@ import {
 const props = defineProps<{
 	rows: ShareRow[]
 	actionsLocked?: boolean
+	inviteDisabled?: boolean
 	invitePending?: boolean
 	pushUpdateDisabled?: boolean
 	pushUpdatePending?: boolean
diff --git a/apps/app-frontend/src/pages/instance/share/shared-instance-share-types.ts b/apps/app-frontend/src/pages/instance/share/shared-instance-share-types.ts
index a6e478ba4e..59d6bf9d0b 100644
--- a/apps/app-frontend/src/pages/instance/share/shared-instance-share-types.ts
+++ b/apps/app-frontend/src/pages/instance/share/shared-instance-share-types.ts
@@ -2,6 +2,8 @@ export type ShareMethod = 'direct' | 'link'
 export type MethodFilter = ShareMethod | 'all'
 export type ShareTableColumn = 'username' | 'lastPlayed' | 'joined' | 'method' | 'actions'
 
+export const SHARED_INSTANCE_USER_LIMIT = 20
+
 export type ShareRow = {
 	id: string
 	username: string
diff --git a/apps/app-frontend/src/pages/instance/share/use-shared-instance-invite-link.ts b/apps/app-frontend/src/pages/instance/share/use-shared-instance-invite-link.ts
index 7a7d0a77a9..d7ad386cf6 100644
--- a/apps/app-frontend/src/pages/instance/share/use-shared-instance-invite-link.ts
+++ b/apps/app-frontend/src/pages/instance/share/use-shared-instance-invite-link.ts
@@ -5,8 +5,11 @@ import { config } from '@/config'
 import { toError } from '@/helpers/errors'
 import { create_shared_instance_invite_link } from '@/helpers/instance'
 
+const DEFAULT_INVITE_LINK_MAX_USES = 10
+
 export function useSharedInstanceInviteLink(
 	instanceId: Ref<string>,
+	maxInviteUses: Ref<number>,
 	onError: (error: unknown) => void,
 ) {
 	const details = ref<Awaited<ReturnType<typeof create_shared_instance_invite_link>>>()
@@ -20,10 +23,12 @@ export function useSharedInstanceInviteLink(
 	async function ensure() {
 		if (details.value) return true
 		if (pending.value) return false
+		const maxUses = Math.min(DEFAULT_INVITE_LINK_MAX_USES, Math.floor(maxInviteUses.value))
+		if (maxUses <= 0) return false
 
 		pending.value = true
 		try {
-			details.value = await create_shared_instance_invite_link(instanceId.value)
+			details.value = await create_shared_instance_invite_link(instanceId.value, { maxUses })
 			return true
 		} catch (error) {
 			onError(error)
@@ -35,6 +40,8 @@ export function useSharedInstanceInviteLink(
 
 	async function update(settings: InviteLinkSettings) {
 		if (!details.value) return
+		const maxInviteLinkUses = Math.floor(maxInviteUses.value)
+		if (maxInviteLinkUses <= 0) return
 
 		pending.value = true
 		try {
@@ -44,7 +51,7 @@ export function useSharedInstanceInviteLink(
 			)
 			details.value = await create_shared_instance_invite_link(instanceId.value, {
 				maxAgeSeconds,
-				maxUses: settings.maxUses,
+				maxUses: Math.min(settings.maxUses, maxInviteLinkUses),
 				replaceInviteId: details.value.inviteId,
 			})
 		} catch (error) {
diff --git a/apps/app-frontend/src/pages/instance/share/use-shared-instance-members.ts b/apps/app-frontend/src/pages/instance/share/use-shared-instance-members.ts
index 2b6d1325d0..57f1a9a691 100644
--- a/apps/app-frontend/src/pages/instance/share/use-shared-instance-members.ts
+++ b/apps/app-frontend/src/pages/instance/share/use-shared-instance-members.ts
@@ -12,7 +12,11 @@ import {
 } from '@/helpers/instance'
 import type { GameInstance } from '@/helpers/types'
 
-import { normalizeInviteKey, type ShareRow } from './shared-instance-share-types'
+import {
+	normalizeInviteKey,
+	SHARED_INSTANCE_USER_LIMIT,
+	type ShareRow,
+} from './shared-instance-share-types'
 
 type MembersQueryKey = readonly ['sharedInstanceUsers', string]
 
@@ -139,6 +143,7 @@ export function useSharedInstanceMembers(options: {
 		if (
 			options.actionsLocked.value ||
 			exclusiveMutationPending.value ||
+			rows.value.length >= SHARED_INSTANCE_USER_LIMIT ||
 			invitingUserIds.has(normalizedId) ||
 			find(user.id, user.username)
 		) {
diff --git a/packages/ui/src/components/sharing/invite-players-modal/index.vue b/packages/ui/src/components/sharing/invite-players-modal/index.vue
index 038c7e8e8f..0499ee1af7 100644
--- a/packages/ui/src/components/sharing/invite-players-modal/index.vue
+++ b/packages/ui/src/components/sharing/invite-players-modal/index.vue
@@ -135,6 +135,7 @@
 		ref="inviteLinkEditor"
 		:link-expires-at="linkExpiresAt"
 		:link-max-uses="linkMaxUses"
+		:link-max-uses-limit="linkMaxUsesLimit"
 		:update-invite-link="updateInviteLink"
 	/>
 </template>
@@ -169,6 +170,7 @@ const props = withDefaults(
 		link?: string
 		linkExpiresAt?: string | Date | null
 		linkMaxUses?: number
+		linkMaxUsesLimit?: number
 		updateInviteLink?: (settings: InviteLinkSettings) => Promise<void>
 		friendsLabel?: string
 		searchPlaceholder?: string
@@ -188,6 +190,7 @@ const props = withDefaults(
 		suggestions: () => [],
 		canInvite: true,
 		linkMaxUses: 10,
+		linkMaxUsesLimit: 2147483647,
 	},
 )
 
diff --git a/packages/ui/src/components/sharing/invite-players-modal/invite-players-modal-invite-link-editor.vue b/packages/ui/src/components/sharing/invite-players-modal/invite-players-modal-invite-link-editor.vue
index 60264bc2d1..e5c0e0cee7 100644
--- a/packages/ui/src/components/sharing/invite-players-modal/invite-players-modal-invite-link-editor.vue
+++ b/packages/ui/src/components/sharing/invite-players-modal/invite-players-modal-invite-link-editor.vue
@@ -21,9 +21,9 @@
 					v-model="maxUses"
 					type="number"
 					:min="1"
-					:max="2147483647"
+					:max="maximumUses"
 					:step="1"
-					:disabled="saving"
+					:disabled="saving || maximumUses === 0"
 				/>
 			</div>
 		</div>
@@ -49,7 +49,7 @@
 
 <script setup lang="ts">
 import { SaveIcon, SpinnerIcon, XIcon } from '@modrinth/assets'
-import { computed, ref } from 'vue'
+import { computed, ref, watch } from 'vue'
 
 import { defineMessages, useVIntl } from '../../../composables/i18n'
 import { injectNotificationManager } from '../../../providers'
@@ -59,11 +59,17 @@ import StyledInput from '../../base/StyledInput.vue'
 import NewModal from '../../modal/NewModal.vue'
 import type { InviteLinkSettings } from './types'
 
-const props = defineProps<{
-	linkExpiresAt?: string | Date | null
-	linkMaxUses: number
-	updateInviteLink?: (settings: InviteLinkSettings) => Promise<void>
-}>()
+const props = withDefaults(
+	defineProps<{
+		linkExpiresAt?: string | Date | null
+		linkMaxUses: number
+		linkMaxUsesLimit?: number
+		updateInviteLink?: (settings: InviteLinkSettings) => Promise<void>
+	}>(),
+	{
+		linkMaxUsesLimit: 2147483647,
+	},
+)
 const { formatMessage } = useVIntl()
 const notificationManager = injectNotificationManager(null)
 const modal = ref<InstanceType<typeof NewModal> | null>(null)
@@ -72,6 +78,7 @@ const maxUses = ref<number>()
 const minimumExpiry = ref(new Date())
 const maximumExpiry = ref(new Date())
 const saving = ref(false)
+const maximumUses = computed(() => Math.max(0, Math.floor(props.linkMaxUsesLimit)))
 
 const messages = defineMessages({
 	title: {
@@ -109,7 +116,7 @@ const canSave = computed(() => {
 		date <= maximumExpiry.value &&
 		Number.isInteger(maxUses.value ?? 0) &&
 		(maxUses.value ?? 0) > 0 &&
-		(maxUses.value ?? 0) <= 2147483647
+		(maxUses.value ?? 0) <= maximumUses.value
 	)
 })
 
@@ -141,16 +148,17 @@ function show() {
 				? maximumExpiry.value
 				: currentExpiry
 	expiry.value = formatLocalDate(date)
-	maxUses.value = props.linkMaxUses
+	maxUses.value = Math.min(props.linkMaxUses, maximumUses.value)
 	modal.value?.show()
 }
 
 async function save() {
 	const date = parseLocalDate(expiry.value)
 	if (!canSave.value || !date || !props.updateInviteLink) return
+	const clampedMaxUses = Math.min(maxUses.value ?? 1, maximumUses.value)
 	saving.value = true
 	try {
-		await props.updateInviteLink({ expiresAt: date, maxUses: maxUses.value ?? 1 })
+		await props.updateInviteLink({ expiresAt: date, maxUses: clampedMaxUses })
 		modal.value?.hide()
 	} catch (error) {
 		notificationManager?.addNotification({
@@ -163,5 +171,9 @@ async function save() {
 	}
 }
 
+watch([maxUses, maximumUses], ([uses, limit]) => {
+	if (uses !== undefined && uses > limit) maxUses.value = limit
+})
+
 defineExpose({ show })
 </script>