diff --git a/src/client/components/post-form.vue b/src/client/components/post-form.vue
index 13bbb3f9e5..86068e5083 100644
--- a/src/client/components/post-form.vue
+++ b/src/client/components/post-form.vue
@@ -107,11 +107,28 @@ export default defineComponent({
 			type: String,
 			required: false
 		},
+		initialVisibility: {
+			type: String,
+			required: false
+		},
+		initialFiles: {
+			type: Array,
+			required: false
+		},
+		initialLocalOnly: {
+			type: Boolean,
+			required: false
+		},
+		visibleUsers: {
+			type: Array,
+			required: false,
+			default: () => []
+		},
 		initialNote: {
 			type: Object,
 			required: false
 		},
-		instant: {
+		share: {
 			type: Boolean,
 			required: false,
 			default: false
@@ -139,8 +156,7 @@ export default defineComponent({
 			useCw: false,
 			cw: null,
 			localOnly: this.$store.state.rememberNoteVisibility ? this.$store.state.localOnly : this.$store.state.defaultNoteLocalOnly,
-			visibility: this.$store.state.rememberNoteVisibility ? this.$store.state.visibility : this.$store.state.defaultNoteVisibility,
-			visibleUsers: [],
+			visibility: (this.$store.state.rememberNoteVisibility ? this.$store.state.visibility : this.$store.state.defaultNoteVisibility) as typeof noteVisibilities[number],
 			autocomplete: null,
 			draghover: false,
 			quoteId: null,
@@ -232,6 +248,18 @@ export default defineComponent({
 			this.text = this.initialText;
 		}
 
+		if (this.initialVisibility) {
+			this.visibility = this.initialVisibility;
+		}
+
+		if (this.initialFiles) {
+			this.files = this.initialFiles;
+		}
+
+		if (typeof this.initialLocalOnly === 'boolean') {
+			this.localOnly = this.initialLocalOnly;
+		}
+
 		if (this.mention) {
 			this.text = this.mention.host ? `@${this.mention.username}@${toASCII(this.mention.host)}` : `@${this.mention.username}`;
 			this.text += ' ';
@@ -306,7 +334,7 @@ export default defineComponent({
 
 		this.$nextTick(() => {
 			// 書きかけの投稿を復元
-			if (!this.instant && !this.mention && !this.specified) {
+			if (!this.share && !this.mention && !this.specified) {
 				const draft = JSON.parse(localStorage.getItem('drafts') || '{}')[this.draftKey];
 				if (draft) {
 					this.text = draft.data.text;
@@ -562,8 +590,6 @@ export default defineComponent({
 		},
 
 		saveDraft() {
-			if (this.instant) return;
-
 			const data = JSON.parse(localStorage.getItem('drafts') || '{}');
 
 			data[this.draftKey] = {
diff --git a/src/client/pages/share.vue b/src/client/pages/share.vue
index 67e598fa8f..2518c95b1c 100644
--- a/src/client/pages/share.vue
+++ b/src/client/pages/share.vue
@@ -3,19 +3,35 @@
 	<section class="_section">
 		<div class="_title" v-if="title">{{ title }}</div>
 		<div class="_content">
-			<XPostForm v-if="!posted" fixed :instant="true" :initial-text="initialText" @posted="posted = true" class="_panel"/>
-			<MkButton v-else primary @click="close()">{{ $ts.close }}</MkButton>
+			<XPostForm
+				v-if="state === 'writing'"
+				fixed
+				:share="true"
+				:initial-text="initialText"
+				:initial-visibility="visibility"
+				:initial-files="files"
+				:initial-local-only="localOnly"
+				:reply="reply"
+				:renote="renote"
+				:visible-users="visibleUsers"
+				@posted="state = 'posted'"
+				class="_panel"
+			/>
+			<MkButton v-else-if="state === 'posted'" primary @click="close()">{{ $ts.close }}</MkButton>
 		</div>
-		<div class="_footer" v-if="url">{{ url }}</div>
 	</section>
 </div>
 </template>
 
 <script lang="ts">
+// SPECIFICATION: https://wiki.misskey.io/ja/advanced-functions/share
+
 import { defineComponent } from 'vue';
 import MkButton from '@client/components/ui/button.vue';
 import XPostForm from '@client/components/post-form.vue';
 import * as os from '@client/os';
+import { noteVisibilities } from '@/types';
+import { parseAcct } from '@/misc/acct';
 import * as symbols from '@client/symbols';
 
 export default defineComponent({
@@ -30,26 +46,107 @@ export default defineComponent({
 				title: this.$ts.share,
 				icon: 'fas fa-share-alt'
 			},
-			title: null,
-			text: null,
-			url: null,
-			initialText: null,
-			posted: false,
+			state: 'fetching' as 'fetching' | 'writing' | 'posted',
+
+			title: null as string | null,
+			initialText: null as string | null,
+			reply: null as any,
+			renote: null as any,
+			visibility: null as string | null,
+			localOnly: null as boolean | null,
+			files: null as any[] | null,
+			visibleUsers: [] as any[],
 
 		}
 	},
 
-	created() {
+	async created() {
 		const urlParams = new URLSearchParams(window.location.search);
+
 		this.title = urlParams.get('title');
-		this.text = urlParams.get('text');
-		this.url = urlParams.get('url');
-		
-		let text = '';
-		if (this.title) text += `【${this.title}】\n`;
-		if (this.text) text += `${this.text}\n`;
-		if (this.url) text += `${this.url}`;
-		this.initialText = text.trim();
+		const text = urlParams.get('text');
+		const url = urlParams.get('url');
+
+		let noteText = '';
+		if (this.title) noteText += `【${this.title}】\n`;
+		// Googleニュース対策
+		if (text?.startsWith(`${this.title}.\n`)) noteText += text.replace(`${this.title}.\n`, '');
+		else if (text && this.title !== text) noteText += `${text}\n`;
+		if (url) noteText += `${url}`;
+		this.initialText = noteText.trim();
+
+		const visibility = urlParams.get('visibility');
+		if (noteVisibilities.includes(visibility)) {
+			this.visibility = visibility;
+		}
+
+		if (this.visibility === 'specified') {
+			const visibleUserIds = urlParams.get('visibleUserIds');
+			const visibleAccts = urlParams.get('visibleAccts');
+			this.visibleUsers = await [
+				...(visibleUserIds ? visibleUserIds.split(',').map(userId => ({ userId })) : []),
+				...(visibleAccts ? visibleAccts.split(',').map(parseAcct) : [])
+			].map(q => os.api('users/show', q)
+				.catch(() => Error(`invalid user query: ${JSON.stringify(q)}`)));
+		}
+
+		const localOnly = urlParams.get('localOnly');
+		if (localOnly === '0') this.localOnly = false;
+		else if (localOnly === '1') this.localOnly = true;
+
+
+		try {
+			//#region Reply
+			const replyId = urlParams.get('replyId');
+			const replyUri = urlParams.get('replyUri');
+			if (replyId) {
+				this.reply = await os.api('notes/show', {
+					noteId: replyId
+				});
+			} else if (replyUri) {
+				const obj = await os.api('ap/show', {
+					uri: replyUri
+				}) as any;
+				if (obj.type === 'Note') {
+					this.reply = obj.object;
+				}
+			}
+			//#endregion
+
+			//#region Renote
+				const renoteId = urlParams.get('renoteId');
+				const renoteUri = urlParams.get('renoteUri');
+				if (renoteId) {
+					this.renote = await os.api('notes/show', {
+						noteId: renoteId
+					});
+				} else if (renoteUri) {
+					const obj = await os.api('ap/show', {
+						uri: renoteUri
+					}) as any;
+					if (obj.type === 'Note') {
+						this.renote = obj.object;
+					}
+				}
+			//#endregion
+
+			//#region Drive files
+				const fileIds = urlParams.get('fileIds');
+				if (fileIds) {
+					const promises = Promise.all(fileIds.split(',')
+						.map(fileId => os.api('drive/files/show', { fileId }).catch(() => Error(`invalid fileId: ${fileId}`))));
+					await promises.then(files => this.files = files);
+				}
+			//#endregion
+		} catch (e) {
+			os.dialog({
+				type: 'error',
+				title: e.message,
+				text: e.name
+			});
+		}
+
+		this.state = 'writing';
 	},
 
 	methods: {