diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 5798ce7ec2..3111768189 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -766,6 +766,7 @@ middle: "中"
 low: "低"
 emailNotConfiguredWarning: "メールアドレスの設定がされていません。"
 ratio: "比率"
+notePreview: "ノートをプレビュー"
 customCss: "カスタムCSS"
 customCssWarn: "この設定は必ず知識のある方が行ってください。不適切な設定を行うとクライアントが正常に使用できなくなる恐れがあります。"
 global: "グローバル"
diff --git a/src/client/components/post-form.vue b/src/client/components/post-form.vue
index 3ff1dfe0df..85117b074e 100644
--- a/src/client/components/post-form.vue
+++ b/src/client/components/post-form.vue
@@ -17,6 +17,7 @@
 				<span v-if="visibility === 'followers'"><i class="fas fa-unlock"></i></span>
 				<span v-if="visibility === 'specified'"><i class="fas fa-envelope"></i></span>
 			</button>
+			<button class="_button preview" @click="showPreview = !showPreview" :class="{ active: showPreview }" v-tooltip="$ts.notePreview"><i class="fas fa-file-code"></i></button>
 			<button class="submit _buttonPrimary" :disabled="!canPost" @click="post" data-cy-open-post-form-submit>{{ submitText }}<i :class="reply ? 'fas fa-reply' : renote ? 'fas fa-quote-right' : 'fas fa-paper-plane'"></i></button>
 		</div>
 	</header>
@@ -40,6 +41,7 @@
 		<input v-show="withHashtags" ref="hashtags" class="hashtags" v-model="hashtags" :placeholder="$ts.hashtags" list="hashtags">
 		<XPostFormAttaches class="attaches" :files="files" @updated="updateFiles" @detach="detachFile" @changeSensitive="updateFileSensitive" @changeName="updateFileName"/>
 		<XPollEditor v-if="poll" :poll="poll" @destroyed="poll = null" @updated="onPollUpdate"/>
+		<XNotePreview class="preview" v-if="showPreview" :note="draftedNote"/>
 		<footer>
 			<button class="_button" @click="chooseFileFrom" v-tooltip="$ts.attachFile"><i class="fas fa-photo-video"></i></button>
 			<button class="_button" @click="togglePoll" :class="{ active: poll }" v-tooltip="$ts.poll"><i class="fas fa-poll-h"></i></button>
@@ -143,6 +145,7 @@ export default defineComponent({
 			files: [],
 			poll: null,
 			useCw: false,
+			showPreview: 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,
@@ -220,6 +223,18 @@ export default defineComponent({
 			return this.$instance ? this.$instance.maxNoteTextLength : 1000;
 		},
 
+		draftedNote(): object {
+			return {
+				user: this.$i,
+				createdAt: new Date(),
+				visibility: this.visibility,
+				localOnly: this.localOnly,
+				cw: this.useCw ? this.cw : null,
+				text: this.text,
+				files: this.files,
+				poll: this.poll,
+			};
+		}
 		withHashtags: defaultStore.makeGetterSetter('postFormWithHashtags'),
 		hashtags: defaultStore.makeGetterSetter('postFormHashtags'),
 	},
@@ -717,7 +732,7 @@ export default defineComponent({
 			> .visibility {
 				height: 34px;
 				width: 34px;
-				margin: 0 8px;
+				margin: 0 0 0 8px;
 
 				& + .localOnly {
 					margin-left: 0 !important;
@@ -729,6 +744,24 @@ export default defineComponent({
 				opacity: 0.7;
 			}
 
+			> .preview {
+				display: inline-block;
+				padding: 0;
+				margin: 0 8px 0 0;
+				font-size: 16px;
+				width: 34px;
+				height: 34px;
+				border-radius: 6px;
+
+				&:hover {
+					background: var(--X5);
+				}
+
+				&.active {
+					color: var(--accent);
+				}
+			}
+
 			> .submit {
 				margin: 16px 16px 16px 0;
 				padding: 0 12px;