diff --git a/src/client/components/post-form.vue b/src/client/components/post-form.vue
index 76919b468e..d825241ac5 100644
--- a/src/client/components/post-form.vue
+++ b/src/client/components/post-form.vue
@@ -112,6 +112,10 @@ export default defineComponent({
 			type: Array,
 			required: false
 		},
+		initialLocalOnly: {
+			type: Boolean,
+			required: false
+		},
 		initialNote: {
 			type: Object,
 			required: false
@@ -228,6 +232,10 @@ export default defineComponent({
 			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 += ' ';
diff --git a/src/client/pages/share.vue b/src/client/pages/share.vue
index fe4e482752..868e6217bc 100644
--- a/src/client/pages/share.vue
+++ b/src/client/pages/share.vue
@@ -50,6 +50,7 @@ export default defineComponent({
 			renote: null as any,
 			specified: null as any,
 			visibility: null as string | null,
+			localOnly: null as boolean | null,
 			files: null as any[] | null,
 
 			faShareAlt
@@ -70,8 +71,20 @@ export default defineComponent({
 		if (url) noteText += `${url}`;
 		this.initialText = noteText.trim();
 
-		this.visibility = urlParams.get('visibility');
-		if (!noteVisibilities.includes(this.visibility)) this.visibility = null;
+		const visibility = urlParams.get('visibility');
+		if (noteVisibilities.includes(visibility)) {
+			this.visibility = visibility;
+		} else {
+			// Mastodonと互換性を持たせてみる
+			if (this.visibility === 'unlisted') this.visibility = 'home';
+			else if (this.visibility === 'private') this.visibility = 'followers';
+			else if (this.visibility === 'direct') this.visibility = 'specified';
+			else this.visibility = null;
+		}
+
+		const localOnly = urlParams.get('localOnly');
+		if (localOnly === '0') this.localOnly = false;
+		else if (localOnly === '1') this.localOnly = true;
 
 		await Promise.all([(async () => {
 			const replyId = urlParams.get('replyId');