diff --git a/packages/frontend/src/components/MkFormDialog.file.vue b/packages/frontend/src/components/MkFormDialog.file.vue
index a11075c342..182ff3ccf5 100644
--- a/packages/frontend/src/components/MkFormDialog.file.vue
+++ b/packages/frontend/src/components/MkFormDialog.file.vue
@@ -51,7 +51,10 @@ if (props.fileId) {
 }
 
 function selectButton(ev: MouseEvent) {
-	selectFile(ev.currentTarget ?? ev.target).then(async (file) => {
+	selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	}).then(async (file) => {
 		if (!file) return;
 		if (props.validate && !await props.validate(file)) return;
 
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 982ed88003..cd4fabea02 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -120,7 +120,7 @@ import { formatTimeString } from '@/utility/format-time-string.js';
 import { Autocomplete } from '@/utility/autocomplete.js';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/utility/misskey-api.js';
-import { selectFiles } from '@/utility/drive.js';
+import { selectFile } from '@/utility/drive.js';
 import { store } from '@/store.js';
 import MkInfo from '@/components/MkInfo.vue';
 import { i18n } from '@/i18n.js';
@@ -437,7 +437,11 @@ function focus() {
 function chooseFileFrom(ev) {
 	if (props.mock) return;
 
-	selectFiles(ev.currentTarget ?? ev.target, i18n.ts.attachFile).then(files_ => {
+	selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: true,
+		label: i18n.ts.attachFile,
+	}).then(files_ => {
 		for (const file of files_) {
 			files.value.push(file);
 		}
diff --git a/packages/frontend/src/components/MkUploaderDialog.vue b/packages/frontend/src/components/MkUploaderDialog.vue
index b2e4896ed3..77ee36b2a2 100644
--- a/packages/frontend/src/components/MkUploaderDialog.vue
+++ b/packages/frontend/src/components/MkUploaderDialog.vue
@@ -79,8 +79,16 @@ SPDX-License-Identifier: AGPL-3.0-only
 </MkModalWindow>
 </template>
 
+<script lang="ts">
+export type UploaderDialogFeatures = {
+	effect?: boolean;
+	watermark?: boolean;
+	crop?: boolean;
+};
+</script>
+
 <script lang="ts" setup>
-import { computed, defineAsyncComponent, markRaw, onMounted, onUnmounted, ref, triggerRef, useTemplateRef, watch } from 'vue';
+import { computed, markRaw, onMounted, onUnmounted, ref, triggerRef, useTemplateRef, watch } from 'vue';
 import * as Misskey from 'misskey-js';
 import { genId } from '@/utility/id.js';
 import { readAndCompressImage } from '@misskey-dev/browser-image-resizer';
@@ -91,7 +99,6 @@ import { i18n } from '@/i18n.js';
 import { prefer } from '@/preferences.js';
 import MkButton from '@/components/MkButton.vue';
 import bytes from '@/filters/bytes.js';
-import MkSelect from '@/components/MkSelect.vue';
 import { isWebpSupported } from '@/utility/isWebpSupported.js';
 import { uploadFile, UploadAbortedError } from '@/utility/drive.js';
 import * as os from '@/os.js';
@@ -131,10 +138,19 @@ const props = withDefaults(defineProps<{
 	files: File[];
 	folderId?: string | null;
 	multiple?: boolean;
+	features?: UploaderDialogFeatures;
 }>(), {
 	multiple: true,
 });
 
+const uploaderFeatures = computed<Required<UploaderDialogFeatures>>(() => {
+	return {
+		effect: props.features?.effect ?? true,
+		watermark: props.features?.watermark ?? true,
+		crop: props.features?.crop ?? true,
+	};
+});
+
 const emit = defineEmits<{
 	(ev: 'done', driveFiles: Misskey.entities.DriveFile[]): void;
 	(ev: 'canceled'): void;
@@ -152,7 +168,7 @@ const items = ref<{
 	uploaded: Misskey.entities.DriveFile | null;
 	uploadFailed: boolean;
 	aborted: boolean;
-	compressionLevel: number;
+	compressionLevel: 0 | 1 | 2 | 3;
 	compressedSize?: number | null;
 	preprocessedFile?: Blob | null;
 	file: File;
@@ -272,7 +288,13 @@ function showMenu(ev: MouseEvent, item: typeof items.value[0]) {
 		},
 	});
 
-	if (CROPPING_SUPPORTED_TYPES.includes(item.file.type) && !item.preprocessing && !item.uploading && !item.uploaded) {
+	if (
+		uploaderFeatures.value.crop &&
+		CROPPING_SUPPORTED_TYPES.includes(item.file.type) &&
+		!item.preprocessing &&
+		!item.uploading &&
+		!item.uploaded
+	) {
 		menu.push({
 			icon: 'ti ti-crop',
 			text: i18n.ts.cropImage,
@@ -292,7 +314,13 @@ function showMenu(ev: MouseEvent, item: typeof items.value[0]) {
 		});
 	}
 
-	if (IMAGE_EDITING_SUPPORTED_TYPES.includes(item.file.type) && !item.preprocessing && !item.uploading && !item.uploaded) {
+	if (
+		uploaderFeatures.value.effect &&
+		IMAGE_EDITING_SUPPORTED_TYPES.includes(item.file.type) &&
+		!item.preprocessing &&
+		!item.uploading &&
+		!item.uploaded
+	) {
 		menu.push({
 			icon: 'ti ti-sparkles',
 			text: i18n.ts._imageEffector.title + ' (BETA)',
@@ -318,7 +346,13 @@ function showMenu(ev: MouseEvent, item: typeof items.value[0]) {
 		});
 	}
 
-	if (WATERMARK_SUPPORTED_TYPES.includes(item.file.type) && !item.preprocessing && !item.uploading && !item.uploaded) {
+	if (
+		uploaderFeatures.value.watermark &&
+		WATERMARK_SUPPORTED_TYPES.includes(item.file.type) &&
+		!item.preprocessing &&
+		!item.uploading &&
+		!item.uploaded
+	) {
 		function changeWatermarkPreset(presetId: string | null) {
 			item.watermarkPresetId = presetId;
 			preprocess(item).then(() => {
@@ -338,7 +372,7 @@ function showMenu(ev: MouseEvent, item: typeof items.value[0]) {
 			}, {
 				type: 'divider',
 			}, ...prefer.s.watermarkPresets.map(preset => ({
-				type: 'radioOption',
+				type: 'radioOption' as const,
 				text: preset.name,
 				active: computed(() => item.watermarkPresetId === preset.id),
 				action: () => changeWatermarkPreset(preset.id),
diff --git a/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue b/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue
index 10de04c16a..6c81d68f85 100644
--- a/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue
+++ b/packages/frontend/src/components/MkWatermarkEditorDialog.Layer.vue
@@ -262,10 +262,9 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script setup lang="ts">
-import { ref, useTemplateRef, watch, onMounted, onUnmounted } from 'vue';
+import { ref, onMounted } from 'vue';
 import type { WatermarkPreset } from '@/utility/watermark.js';
 import { i18n } from '@/i18n.js';
-import MkSelect from '@/components/MkSelect.vue';
 import MkButton from '@/components/MkButton.vue';
 import MkInput from '@/components/MkInput.vue';
 import MkSwitch from '@/components/MkSwitch.vue';
@@ -275,7 +274,6 @@ import MkPositionSelector from '@/components/MkPositionSelector.vue';
 import * as os from '@/os.js';
 import { selectFile } from '@/utility/drive.js';
 import { misskeyApi } from '@/utility/misskey-api.js';
-import { prefer } from '@/preferences.js';
 
 const layer = defineModel<WatermarkPreset['layers'][number]>('layer', { required: true });
 
@@ -294,7 +292,14 @@ onMounted(async () => {
 });
 
 function chooseFile(ev: MouseEvent) {
-	selectFile(ev.currentTarget ?? ev.target, i18n.ts.selectFile).then((file) => {
+	selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+		label: i18n.ts.selectFile,
+		features: {
+			watermark: false,
+		},
+	}).then((file) => {
 		if (!file.type.startsWith('image')) {
 			os.alert({
 				type: 'warning',
diff --git a/packages/frontend/src/components/MkWatermarkEditorDialog.vue b/packages/frontend/src/components/MkWatermarkEditorDialog.vue
index 4cfb4a72bc..db231f90d7 100644
--- a/packages/frontend/src/components/MkWatermarkEditorDialog.vue
+++ b/packages/frontend/src/components/MkWatermarkEditorDialog.vue
@@ -124,7 +124,7 @@ function createStripeLayer(): WatermarkPreset['layers'][number] {
 		angle: 0.5,
 		frequency: 10,
 		threshold: 0.1,
-		black: false,
+		color: [0, 0, 0],
 		opacity: 0.75,
 	};
 }
@@ -140,7 +140,7 @@ function createPolkadotLayer(): WatermarkPreset['layers'][number] {
 		majorOpacity: 0.75,
 		minorOpacity: 0.5,
 		minorDivisions: 4,
-		black: false,
+		color: [0, 0, 0],
 		opacity: 0.75,
 	};
 }
@@ -151,7 +151,7 @@ function createCheckerLayer(): WatermarkPreset['layers'][number] {
 		type: 'checker',
 		angle: 0.5,
 		scale: 3,
-		black: false,
+		color: [0, 0, 0],
 		opacity: 0.75,
 	};
 }
@@ -177,6 +177,7 @@ const dialog = useTemplateRef('dialog');
 
 async function cancel() {
 	const { canceled } = await os.confirm({
+		type: 'question',
 		text: i18n.ts._watermarkEditor.quitWithoutSaveConfirm,
 	});
 	if (canceled) return;
diff --git a/packages/frontend/src/os.ts b/packages/frontend/src/os.ts
index be247f96c4..83ad0ebdf9 100644
--- a/packages/frontend/src/os.ts
+++ b/packages/frontend/src/os.ts
@@ -13,6 +13,7 @@ import type { ComponentProps as CP } from 'vue-component-type-helpers';
 import type { Form, GetFormResultType } from '@/utility/form.js';
 import type { MenuItem } from '@/types/menu.js';
 import type { PostFormProps } from '@/types/post-form.js';
+import type { UploaderDialogFeatures } from '@/components/MkUploaderDialog.vue';
 import type MkRoleSelectDialog_TypeReferenceOnly from '@/components/MkRoleSelectDialog.vue';
 import type MkEmojiPickerDialog_TypeReferenceOnly from '@/components/MkEmojiPickerDialog.vue';
 import { misskeyApi } from '@/utility/misskey-api.js';
@@ -836,6 +837,7 @@ export function launchUploader(
 	options?: {
 		folderId?: string | null;
 		multiple?: boolean;
+		features?: UploaderDialogFeatures;
 	},
 ): Promise<Misskey.entities.DriveFile[]> {
 	return new Promise(async (res, rej) => {
@@ -844,6 +846,7 @@ export function launchUploader(
 			files: markRaw(files),
 			folderId: options?.folderId,
 			multiple: options?.multiple,
+			features: options?.features,
 		}, {
 			done: driveFiles => {
 				if (driveFiles.length === 0) return rej();
diff --git a/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue b/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue
index 4c2c26ec45..a380bd133e 100644
--- a/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue
+++ b/packages/frontend/src/pages/admin/custom-emojis-manager.local.list.vue
@@ -174,7 +174,10 @@ function setupGrid(): GridSetting {
 			{
 				bindTo: 'url', icon: 'ti-icons', type: 'image', editable: true, width: 'auto', validators: [required],
 				async customValueEditor(row, col, value, cellElement) {
-					const file = await selectFile(cellElement);
+					const file = await selectFile({
+						anchorElement: cellElement,
+						multiple: false,
+					});
 					gridItems.value[row.index].url = file.url;
 					gridItems.value[row.index].fileId = file.id;
 
diff --git a/packages/frontend/src/pages/channel-editor.vue b/packages/frontend/src/pages/channel-editor.vue
index 355b5464a1..72281ea882 100644
--- a/packages/frontend/src/pages/channel-editor.vue
+++ b/packages/frontend/src/pages/channel-editor.vue
@@ -188,7 +188,10 @@ async function archive() {
 }
 
 function setBannerImage(evt) {
-	selectFile(evt.currentTarget ?? evt.target, null).then(file => {
+	selectFile({
+		anchorElement: evt.currentTarget ?? evt.target,
+		multiple: false,
+	}).then(file => {
 		bannerId.value = file.id;
 	});
 }
diff --git a/packages/frontend/src/pages/chat/room.form.vue b/packages/frontend/src/pages/chat/room.form.vue
index 7e3be67230..17b68d6eb9 100644
--- a/packages/frontend/src/pages/chat/room.form.vue
+++ b/packages/frontend/src/pages/chat/room.form.vue
@@ -168,7 +168,11 @@ function onKeydown(ev: KeyboardEvent) {
 }
 
 function chooseFile(ev: MouseEvent) {
-	selectFile(ev.currentTarget ?? ev.target, i18n.ts.selectFile).then(selectedFile => {
+	selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+		label: i18n.ts.selectFile,
+	}).then(selectedFile => {
 		file.value = selectedFile;
 	});
 }
diff --git a/packages/frontend/src/pages/custom-emojis-manager.vue b/packages/frontend/src/pages/custom-emojis-manager.vue
index 5aba0f68a3..36d638b210 100644
--- a/packages/frontend/src/pages/custom-emojis-manager.vue
+++ b/packages/frontend/src/pages/custom-emojis-manager.vue
@@ -214,7 +214,10 @@ const menu = (ev: MouseEvent) => {
 		icon: 'ti ti-upload',
 		text: i18n.ts.import,
 		action: async () => {
-			const file = await selectFile(ev.currentTarget ?? ev.target);
+			const file = await selectFile({
+				anchorElement: ev.currentTarget ?? ev.target,
+				multiple: false,
+			});
 			misskeyApi('admin/emoji/import-zip', {
 				fileId: file.id,
 			})
diff --git a/packages/frontend/src/pages/emoji-edit-dialog.vue b/packages/frontend/src/pages/emoji-edit-dialog.vue
index 41de457427..b4fc4a46d9 100644
--- a/packages/frontend/src/pages/emoji-edit-dialog.vue
+++ b/packages/frontend/src/pages/emoji-edit-dialog.vue
@@ -121,7 +121,10 @@ watch(roleIdsThatCanBeUsedThisEmojiAsReaction, async () => {
 const imgUrl = computed(() => file.value ? file.value.url : props.emoji ? props.emoji.url : null);
 
 async function changeImage(ev: Event) {
-	file.value = await selectFile(ev.currentTarget ?? ev.target, null);
+	file.value = await selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	});
 	const candidate = file.value.name.replace(/\.(.+)$/, '');
 	if (candidate.match(/^[a-z0-9_]+$/)) {
 		name.value = candidate;
diff --git a/packages/frontend/src/pages/gallery/edit.vue b/packages/frontend/src/pages/gallery/edit.vue
index 1b8c14a156..54c23ea880 100644
--- a/packages/frontend/src/pages/gallery/edit.vue
+++ b/packages/frontend/src/pages/gallery/edit.vue
@@ -44,7 +44,7 @@ import MkInput from '@/components/MkInput.vue';
 import MkTextarea from '@/components/MkTextarea.vue';
 import MkSwitch from '@/components/MkSwitch.vue';
 import FormSuspense from '@/components/form/suspense.vue';
-import { selectFiles } from '@/utility/drive.js';
+import { selectFile } from '@/utility/drive.js';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/utility/misskey-api.js';
 import { definePage } from '@/page.js';
@@ -63,8 +63,11 @@ const description = ref<string | null>(null);
 const title = ref<string | null>(null);
 const isSensitive = ref(false);
 
-function selectFile(evt) {
-	selectFiles(evt.currentTarget ?? evt.target, null).then(selected => {
+function chooseFile(evt) {
+	selectFile({
+		anchorElement: evt.currentTarget ?? evt.target,
+		multiple: false,
+	}).then(selected => {
 		files.value = files.value.concat(selected);
 	});
 }
diff --git a/packages/frontend/src/pages/page-editor/page-editor.vue b/packages/frontend/src/pages/page-editor/page-editor.vue
index 05eb0bd9d2..8a9b9a9b08 100644
--- a/packages/frontend/src/pages/page-editor/page-editor.vue
+++ b/packages/frontend/src/pages/page-editor/page-editor.vue
@@ -205,7 +205,10 @@ async function add() {
 }
 
 function setEyeCatchingImage(img: Event) {
-	selectFile(img.currentTarget ?? img.target, null).then(file => {
+	selectFile({
+		anchorElement: img.currentTarget ?? img.target,
+		multiple: false,
+	}).then(file => {
 		eyeCatchingImageId.value = file.id;
 	});
 }
diff --git a/packages/frontend/src/pages/settings/account-data.vue b/packages/frontend/src/pages/settings/account-data.vue
index d175c0dc32..5a00d7a9d7 100644
--- a/packages/frontend/src/pages/settings/account-data.vue
+++ b/packages/frontend/src/pages/settings/account-data.vue
@@ -233,7 +233,10 @@ const exportAntennas = () => {
 };
 
 const importFollowing = async (ev) => {
-	const file = await selectFile(ev.currentTarget ?? ev.target);
+	const file = await selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	});
 	misskeyApi('i/import-following', {
 		fileId: file.id,
 		withReplies: withReplies.value,
@@ -241,22 +244,34 @@ const importFollowing = async (ev) => {
 };
 
 const importUserLists = async (ev) => {
-	const file = await selectFile(ev.currentTarget ?? ev.target);
+	const file = await selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	});
 	misskeyApi('i/import-user-lists', { fileId: file.id }).then(onImportSuccess).catch(onError);
 };
 
 const importMuting = async (ev) => {
-	const file = await selectFile(ev.currentTarget ?? ev.target);
+	const file = await selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	});
 	misskeyApi('i/import-muting', { fileId: file.id }).then(onImportSuccess).catch(onError);
 };
 
 const importBlocking = async (ev) => {
-	const file = await selectFile(ev.currentTarget ?? ev.target);
+	const file = await selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	});
 	misskeyApi('i/import-blocking', { fileId: file.id }).then(onImportSuccess).catch(onError);
 };
 
 const importAntennas = async (ev) => {
-	const file = await selectFile(ev.currentTarget ?? ev.target);
+	const file = await selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	});
 	misskeyApi('i/import-antennas', { fileId: file.id }).then(onImportSuccess).catch(onError);
 };
 
diff --git a/packages/frontend/src/pages/settings/deck.vue b/packages/frontend/src/pages/settings/deck.vue
index 22bd8cbc80..ae882d1ee2 100644
--- a/packages/frontend/src/pages/settings/deck.vue
+++ b/packages/frontend/src/pages/settings/deck.vue
@@ -114,7 +114,10 @@ watch(wallpaper, async () => {
 });
 
 function setWallpaper(ev: MouseEvent) {
-	selectFile(ev.currentTarget ?? ev.target, null).then(file => {
+	selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+	}).then(file => {
 		wallpaper.value = file.url;
 	});
 }
diff --git a/packages/frontend/src/pages/settings/sounds.sound.vue b/packages/frontend/src/pages/settings/sounds.sound.vue
index ffbbefa122..7aad43b1d0 100644
--- a/packages/frontend/src/pages/settings/sounds.sound.vue
+++ b/packages/frontend/src/pages/settings/sounds.sound.vue
@@ -94,7 +94,11 @@ const friendlyFileName = computed<string>(() => {
 });
 
 function selectSound(ev) {
-	selectFile(ev.currentTarget ?? ev.target, i18n.ts._soundSettings.driveFile).then(async (file) => {
+	selectFile({
+		anchorElement: ev.currentTarget ?? ev.target,
+		multiple: false,
+		label: i18n.ts._soundSettings.driveFile,
+	}).then(async (file) => {
 		if (!file.type.startsWith('audio')) {
 			os.alert({
 				type: 'warning',
diff --git a/packages/frontend/src/preferences/def.ts b/packages/frontend/src/preferences/def.ts
index 727b79e045..a83a3153d0 100644
--- a/packages/frontend/src/preferences/def.ts
+++ b/packages/frontend/src/preferences/def.ts
@@ -422,7 +422,7 @@ export const PREF_DEF = definePreferences({
 		default: null as WatermarkPreset['id'] | null,
 	},
 	defaultImageCompressionLevel: {
-		default: 2,
+		default: 2 as 0 | 1 | 2 | 3,
 	},
 
 	'sound.masterVolume': {
diff --git a/packages/frontend/src/utility/drive.ts b/packages/frontend/src/utility/drive.ts
index 0e10f80145..bc1813f48c 100644
--- a/packages/frontend/src/utility/drive.ts
+++ b/packages/frontend/src/utility/drive.ts
@@ -16,6 +16,7 @@ import { instance } from '@/instance.js';
 import { globalEvents } from '@/events.js';
 import { getProxiedImageUrl } from '@/utility/media-proxy.js';
 import { genId } from '@/utility/id.js';
+import type { UploaderDialogFeatures } from '@/components/MkUploaderDialog.vue';
 
 type UploadReturnType = {
 	filePromise: Promise<Misskey.entities.DriveFile>;
@@ -155,6 +156,7 @@ export function uploadFile(file: File | Blob, options: {
 export function chooseFileFromPcAndUpload(
 	options: {
 		multiple?: boolean;
+		features?: UploaderDialogFeatures;
 		folderId?: string | null;
 	} = {},
 ): Promise<Misskey.entities.DriveFile[]> {
@@ -163,6 +165,7 @@ export function chooseFileFromPcAndUpload(
 			if (files.length === 0) return;
 			os.launchUploader(files, {
 				folderId: options.folderId,
+				features: options.features,
 			}).then(driveFiles => {
 				res(driveFiles);
 			});
@@ -194,7 +197,7 @@ export function chooseFileFromUrl(): Promise<Misskey.entities.DriveFile> {
 			type: 'url',
 			placeholder: i18n.ts.uploadFromUrlDescription,
 		}).then(({ canceled, result: url }) => {
-			if (canceled) return;
+			if (canceled || url == null) return;
 
 			const marker = genId();
 
@@ -221,7 +224,7 @@ export function chooseFileFromUrl(): Promise<Misskey.entities.DriveFile> {
 	});
 }
 
-function select(anchorElement: HTMLElement | EventTarget | null, label: string | null, multiple: boolean): Promise<Misskey.entities.DriveFile[]> {
+function select(anchorElement: HTMLElement | EventTarget | null, label: string | null, multiple: boolean, features?: UploaderDialogFeatures): Promise<Misskey.entities.DriveFile[]> {
 	return new Promise((res, rej) => {
 		os.popupMenu([label ? {
 			text: label,
@@ -229,7 +232,7 @@ function select(anchorElement: HTMLElement | EventTarget | null, label: string |
 		} : undefined, {
 			text: i18n.ts.upload,
 			icon: 'ti ti-upload',
-			action: () => chooseFileFromPcAndUpload({ multiple }).then(files => res(files)),
+			action: () => chooseFileFromPcAndUpload({ multiple, features }).then(files => res(files)),
 		}, {
 			text: i18n.ts.fromDrive,
 			icon: 'ti ti-cloud',
@@ -242,12 +245,19 @@ function select(anchorElement: HTMLElement | EventTarget | null, label: string |
 	});
 }
 
-export function selectFile(anchorElement: HTMLElement | EventTarget | null, label: string | null = null): Promise<Misskey.entities.DriveFile> {
-	return select(anchorElement, label, false).then(files => files[0]);
-}
+type SelectFileOptions<M extends boolean> = {
+	anchorElement: HTMLElement | EventTarget | null;
+	multiple: M;
+	label?: string | null;
+	features?: UploaderDialogFeatures;
+};
 
-export function selectFiles(anchorElement: HTMLElement | EventTarget | null, label: string | null = null): Promise<Misskey.entities.DriveFile[]> {
-	return select(anchorElement, label, true);
+export async function selectFile<
+	M extends boolean,
+	MR extends M extends true ? Misskey.entities.DriveFile[] : Misskey.entities.DriveFile
+>(opts: SelectFileOptions<M>): Promise<MR> {
+	const files = await select(opts.anchorElement, opts.label ?? null, opts.multiple ?? false, opts.features);
+	return opts.multiple ? (files as MR) : (files[0]! as MR);
 }
 
 export async function createCroppedImageDriveFileFromImageDriveFile(imageDriveFile: Misskey.entities.DriveFile, options: {