diff --git a/src/web/app/desktop/tags/images-viewer.tag b/src/web/app/desktop/tags/images-viewer.tag
deleted file mode 100644
index 1ad382dda8..0000000000
--- a/src/web/app/desktop/tags/images-viewer.tag
+++ /dev/null
@@ -1,104 +0,0 @@
-<mk-images-viewer>
-	<virtual each={ image in images }>
-		<mk-images-viewer-image image={ image } images={ images }/>
-	</virtual>
-	<style>
-		:scope
-			display grid
-			grid-gap .25em
-	</style>
-	<script>
-		this.images = this.opts.images;
-
-		this.on('mount', () => {
-			if (this.images.length == 1) {
-				this.root.style.gridTemplateRows = '256px';
-
-				this.tags['mk-images-viewer-image'].root.style.gridColumn = '1 / 2';
-				this.tags['mk-images-viewer-image'].root.style.gridRow = '1 / 2';
-			} else if (this.images.length == 2) {
-				this.root.style.gridTemplateColumns = '50% 50%';
-				this.root.style.gridTemplateRows = '256px';
-
-				this.tags['mk-images-viewer-image'][0].root.style.gridColumn = '1 / 2';
-				this.tags['mk-images-viewer-image'][0].root.style.gridRow = '1 / 2';
-				this.tags['mk-images-viewer-image'][1].root.style.gridColumn = '2 / 3';
-				this.tags['mk-images-viewer-image'][1].root.style.gridRow = '1 / 2';
-			} else if (this.images.length == 3) {
-				this.root.style.gridTemplateColumns = '70% 30%';
-				this.root.style.gridTemplateRows = '128px 128px';
-
-				this.tags['mk-images-viewer-image'][0].root.style.gridColumn = '1 / 2';
-				this.tags['mk-images-viewer-image'][0].root.style.gridRow = '1 / 3';
-				this.tags['mk-images-viewer-image'][1].root.style.gridColumn = '2 / 3';
-				this.tags['mk-images-viewer-image'][1].root.style.gridRow = '1 / 2';
-				this.tags['mk-images-viewer-image'][2].root.style.gridColumn = '2 / 3';
-				this.tags['mk-images-viewer-image'][2].root.style.gridRow = '2 / 3';
-			} else if (this.images.length == 4) {
-				this.root.style.gridTemplateColumns = '50% 50%';
-				this.root.style.gridTemplateRows = '128px 128px';
-
-				this.tags['mk-images-viewer-image'][0].root.style.gridColumn = '1 / 2';
-				this.tags['mk-images-viewer-image'][0].root.style.gridRow = '1 / 2';
-				this.tags['mk-images-viewer-image'][1].root.style.gridColumn = '2 / 3';
-				this.tags['mk-images-viewer-image'][1].root.style.gridRow = '1 / 2';
-				this.tags['mk-images-viewer-image'][2].root.style.gridColumn = '1 / 2';
-				this.tags['mk-images-viewer-image'][2].root.style.gridRow = '2 / 3';
-				this.tags['mk-images-viewer-image'][3].root.style.gridColumn = '2 / 3';
-				this.tags['mk-images-viewer-image'][3].root.style.gridRow = '2 / 3';
-			}
-		});
-	</script>
-</mk-images-viewer>
-
-<mk-images-viewer-image>
-	<div ref="view" onmousemove={ mousemove } onmouseleave={ mouseleave } style={ 'background-image: url(' + image.url + '?thumbnail&size=512' } onclick={ click }>
-		<img ref="image" src={ image.url + '?thumbnail&size=512' } alt={ image.name } title={ image.name }/>
-	</div>
-	<style>
-		:scope
-			display block
-			overflow hidden
-			border-radius 4px
-
-			> div
-				cursor zoom-in
-				overflow hidden
-				width 100%
-				height 100%
-				background-position center
-
-				> img
-					display block
-					visibility hidden
-					max-width: 100%
-					max-height: 256px
-
-				&:not(:hover)
-					background-size cover
-
-	</style>
-	<script>
-		this.mousemove = e => {
-			const rect = this.refs.view.getBoundingClientRect();
-			const mouseX = e.clientX - rect.left;
-			const mouseY = e.clientY - rect.top;
-			const xp = mouseX / this.refs.view.offsetWidth * 100;
-			const yp = mouseY / this.refs.view.offsetHeight * 100;
-			this.refs.view.style.backgroundPosition = xp + '% ' + yp + '%';
-			this.refs.view.style.backgroundImage = 'url("' + this.image.url + '?thumbnail")';
-		};
-
-		this.mouseleave = () => {
-			this.refs.view.style.backgroundPosition = "";
-		};
-
-		this.click = () => {
-			riot.mount(document.body.appendChild(document.createElement('mk-image-dialog')), {
-				image: this.image
-			});
-		};
-
-		this.image = this.opts.image;
-	</script>
-</mk-images-viewer-image>
diff --git a/src/web/app/desktop/tags/images.tag b/src/web/app/desktop/tags/images.tag
new file mode 100644
index 0000000000..ce67d26a9f
--- /dev/null
+++ b/src/web/app/desktop/tags/images.tag
@@ -0,0 +1,100 @@
+<mk-images>
+	<virtual each={ image in images }>
+		<mk-images-image image={ image }/>
+	</virtual>
+	<style>
+		:scope
+			display grid
+			grid-gap 4px
+			height 256px
+	</style>
+	<script>
+		this.images = this.opts.images;
+
+		this.on('mount', () => {
+			if (this.images.length == 1) {
+				this.root.style.gridTemplateRows = '1fr';
+
+				this.tags['mk-images-image'].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'].root.style.gridRow = '1 / 2';
+			} else if (this.images.length == 2) {
+				this.root.style.gridTemplateColumns = '1fr 1fr';
+				this.root.style.gridTemplateRows = '1fr';
+
+				this.tags['mk-images-image'][0].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][0].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][1].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][1].root.style.gridRow = '1 / 2';
+			} else if (this.images.length == 3) {
+				this.root.style.gridTemplateColumns = '1fr 0.5fr';
+				this.root.style.gridTemplateRows = '1fr 1fr';
+
+				this.tags['mk-images-image'][0].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][0].root.style.gridRow = '1 / 3';
+				this.tags['mk-images-image'][1].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][1].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][2].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][2].root.style.gridRow = '2 / 3';
+			} else if (this.images.length == 4) {
+				this.root.style.gridTemplateColumns = '1fr 1fr';
+				this.root.style.gridTemplateRows = '1fr 1fr';
+
+				this.tags['mk-images-image'][0].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][0].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][1].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][1].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][2].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][2].root.style.gridRow = '2 / 3';
+				this.tags['mk-images-image'][3].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][3].root.style.gridRow = '2 / 3';
+			}
+		});
+	</script>
+</mk-images>
+
+<mk-images-image>
+	<a ref="view" href={ image.url } onmousemove={ mousemove } onmouseleave={ mouseleave } style={ 'background-image: url(' + image.url + '?thumbnail&size=512' } onclick={ click } title={ image.name }></a>
+	<style>
+		:scope
+			display block
+			overflow hidden
+			border-radius 4px
+
+			> a
+				display block
+				cursor zoom-in
+				overflow hidden
+				width 100%
+				height 100%
+				background-position center
+
+				&:not(:hover)
+					background-size cover
+
+	</style>
+	<script>
+		this.image = this.opts.image;
+
+		this.mousemove = e => {
+			const rect = this.refs.view.getBoundingClientRect();
+			const mouseX = e.clientX - rect.left;
+			const mouseY = e.clientY - rect.top;
+			const xp = mouseX / this.refs.view.offsetWidth * 100;
+			const yp = mouseY / this.refs.view.offsetHeight * 100;
+			this.refs.view.style.backgroundPosition = xp + '% ' + yp + '%';
+			this.refs.view.style.backgroundImage = 'url("' + this.image.url + '?thumbnail")';
+		};
+
+		this.mouseleave = () => {
+			this.refs.view.style.backgroundPosition = '';
+		};
+
+		this.click = ev => {
+			ev.preventDefault();
+			riot.mount(document.body.appendChild(document.createElement('mk-image-dialog')), {
+				image: this.image
+			});
+			return false;
+		};
+	</script>
+</mk-images-image>
diff --git a/src/web/app/desktop/tags/index.ts b/src/web/app/desktop/tags/index.ts
index 3ec1d108aa..30a13b584d 100644
--- a/src/web/app/desktop/tags/index.ts
+++ b/src/web/app/desktop/tags/index.ts
@@ -76,7 +76,7 @@ require('./set-avatar-suggestion.tag');
 require('./set-banner-suggestion.tag');
 require('./repost-form.tag');
 require('./sub-post-content.tag');
-require('./images-viewer.tag');
+require('./images.tag');
 require('./image-dialog.tag');
 require('./donation.tag');
 require('./users-list.tag');
diff --git a/src/web/app/desktop/tags/post-detail-sub.tag b/src/web/app/desktop/tags/post-detail-sub.tag
index ab45b55234..cccd85c474 100644
--- a/src/web/app/desktop/tags/post-detail-sub.tag
+++ b/src/web/app/desktop/tags/post-detail-sub.tag
@@ -17,7 +17,7 @@
 		<div class="body">
 			<div class="text" ref="text"></div>
 			<div class="media" if={ post.media }>
-				<mk-images-viewer images={ post.media }/>
+				<mk-images images={ post.media }/>
 			</div>
 		</div>
 	</div>
diff --git a/src/web/app/desktop/tags/post-detail.tag b/src/web/app/desktop/tags/post-detail.tag
index 23f7a41985..47c71a6c12 100644
--- a/src/web/app/desktop/tags/post-detail.tag
+++ b/src/web/app/desktop/tags/post-detail.tag
@@ -37,7 +37,7 @@
 			<div class="body">
 				<div class="text" ref="text"></div>
 				<div class="media" if={ p.media }>
-					<mk-images-viewer images={ p.media }/>
+					<mk-images images={ p.media }/>
 				</div>
 				<mk-poll if={ p.poll } post={ p }/>
 			</div>
diff --git a/src/web/app/desktop/tags/sub-post-content.tag b/src/web/app/desktop/tags/sub-post-content.tag
index 8989ff1c5b..1a81b545b6 100644
--- a/src/web/app/desktop/tags/sub-post-content.tag
+++ b/src/web/app/desktop/tags/sub-post-content.tag
@@ -8,7 +8,7 @@
 	</div>
 	<details if={ post.media }>
 		<summary>({ post.media.length }つのメディア)</summary>
-		<mk-images-viewer images={ post.media }/>
+		<mk-images images={ post.media }/>
 	</details>
 	<details if={ post.poll }>
 		<summary>投票</summary>
diff --git a/src/web/app/desktop/tags/timeline.tag b/src/web/app/desktop/tags/timeline.tag
index 77e4a573b1..ed77a9e608 100644
--- a/src/web/app/desktop/tags/timeline.tag
+++ b/src/web/app/desktop/tags/timeline.tag
@@ -120,7 +120,7 @@
 					<a class="quote" if={ p.repost != null }>RP:</a>
 				</div>
 				<div class="media" if={ p.media }>
-					<mk-images-viewer images={ p.media }/>
+					<mk-images images={ p.media }/>
 				</div>
 				<mk-poll if={ p.poll } post={ p } ref="pollViewer"/>
 				<div class="repost" if={ p.repost }>%fa:quote-right -flip-h%
diff --git a/src/web/app/mobile/tags/images-viewer.tag b/src/web/app/mobile/tags/images-viewer.tag
deleted file mode 100644
index 8ef4a50be0..0000000000
--- a/src/web/app/mobile/tags/images-viewer.tag
+++ /dev/null
@@ -1,26 +0,0 @@
-<mk-images-viewer>
-	<div class="image" ref="view" onclick={ click }><img ref="img" src={ image.url + '?thumbnail&size=512' } alt={ image.name } title={ image.name }/></div>
-	<style>
-		:scope
-			display block
-			overflow hidden
-			border-radius 4px
-
-			> .image
-
-				> img
-					display block
-					max-height 256px
-					max-width 100%
-					margin 0 auto
-
-	</style>
-	<script>
-		this.images = this.opts.images;
-		this.image = this.images[0];
-
-		this.click = () => {
-			window.open(this.image.url);
-		};
-	</script>
-</mk-images-viewer>
diff --git a/src/web/app/mobile/tags/images.tag b/src/web/app/mobile/tags/images.tag
new file mode 100644
index 0000000000..aaa80e4fd1
--- /dev/null
+++ b/src/web/app/mobile/tags/images.tag
@@ -0,0 +1,78 @@
+<mk-images>
+	<virtual each={ image in images }>
+		<mk-images-image image={ image }/>
+	</virtual>
+	<style>
+		:scope
+			display grid
+			grid-gap 4px
+			height 256px
+
+			@media (max-width 500px)
+				height 192px
+	</style>
+	<script>
+		this.images = this.opts.images;
+
+		this.on('mount', () => {
+			if (this.images.length == 1) {
+				this.root.style.gridTemplateRows = '1fr';
+
+				this.tags['mk-images-image'].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'].root.style.gridRow = '1 / 2';
+			} else if (this.images.length == 2) {
+				this.root.style.gridTemplateColumns = '1fr 1fr';
+				this.root.style.gridTemplateRows = '1fr';
+
+				this.tags['mk-images-image'][0].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][0].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][1].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][1].root.style.gridRow = '1 / 2';
+			} else if (this.images.length == 3) {
+				this.root.style.gridTemplateColumns = '1fr 0.5fr';
+				this.root.style.gridTemplateRows = '1fr 1fr';
+
+				this.tags['mk-images-image'][0].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][0].root.style.gridRow = '1 / 3';
+				this.tags['mk-images-image'][1].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][1].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][2].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][2].root.style.gridRow = '2 / 3';
+			} else if (this.images.length == 4) {
+				this.root.style.gridTemplateColumns = '1fr 1fr';
+				this.root.style.gridTemplateRows = '1fr 1fr';
+
+				this.tags['mk-images-image'][0].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][0].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][1].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][1].root.style.gridRow = '1 / 2';
+				this.tags['mk-images-image'][2].root.style.gridColumn = '1 / 2';
+				this.tags['mk-images-image'][2].root.style.gridRow = '2 / 3';
+				this.tags['mk-images-image'][3].root.style.gridColumn = '2 / 3';
+				this.tags['mk-images-image'][3].root.style.gridRow = '2 / 3';
+			}
+		});
+	</script>
+</mk-images>
+
+<mk-images-image>
+	<a ref="view" href={ image.url } target="_blank" style={ 'background-image: url(' + image.url + '?thumbnail&size=512' } title={ image.name }></a>
+	<style>
+		:scope
+			display block
+			overflow hidden
+			border-radius 4px
+
+			> a
+				display block
+				overflow hidden
+				width 100%
+				height 100%
+				background-position center
+				background-size cover
+
+	</style>
+	<script>
+		this.image = this.opts.image;
+	</script>
+</mk-images-image>
diff --git a/src/web/app/mobile/tags/index.ts b/src/web/app/mobile/tags/index.ts
index 19952c20cd..fd5952ea13 100644
--- a/src/web/app/mobile/tags/index.ts
+++ b/src/web/app/mobile/tags/index.ts
@@ -25,7 +25,7 @@ require('./home-timeline.tag');
 require('./timeline.tag');
 require('./post-preview.tag');
 require('./sub-post-content.tag');
-require('./images-viewer.tag');
+require('./images.tag');
 require('./drive.tag');
 require('./drive-selector.tag');
 require('./drive-folder-selector.tag');
diff --git a/src/web/app/mobile/tags/post-detail.tag b/src/web/app/mobile/tags/post-detail.tag
index 9f212a2496..1816d1bf93 100644
--- a/src/web/app/mobile/tags/post-detail.tag
+++ b/src/web/app/mobile/tags/post-detail.tag
@@ -34,7 +34,7 @@
 		<div class="body">
 			<div class="text" ref="text"></div>
 			<div class="media" if={ p.media }>
-				<virtual each={ file in p.media }><img src={ file.url + '?thumbnail&size=512' } alt={ file.name } title={ file.name }/></virtual>
+				<mk-images images={ p.media }/>
 			</div>
 			<mk-poll if={ p.poll } post={ p }/>
 		</div>
diff --git a/src/web/app/mobile/tags/sub-post-content.tag b/src/web/app/mobile/tags/sub-post-content.tag
index 9436b6c1d7..adeb84dea0 100644
--- a/src/web/app/mobile/tags/sub-post-content.tag
+++ b/src/web/app/mobile/tags/sub-post-content.tag
@@ -2,7 +2,7 @@
 	<div class="body"><a class="reply" if={ post.reply_id }>%fa:reply%</a><span ref="text"></span><a class="quote" if={ post.repost_id } href={ '/post:' + post.repost_id }>RP: ...</a></div>
 	<details if={ post.media }>
 		<summary>({ post.media.length }個のメディア)</summary>
-		<mk-images-viewer images={ post.media }/>
+		<mk-images images={ post.media }/>
 	</details>
 	<details if={ post.poll }>
 		<summary>%i18n:mobile.tags.mk-sub-post-content.poll%</summary>
diff --git a/src/web/app/mobile/tags/timeline.tag b/src/web/app/mobile/tags/timeline.tag
index 19f90a1c11..9e85f97da3 100644
--- a/src/web/app/mobile/tags/timeline.tag
+++ b/src/web/app/mobile/tags/timeline.tag
@@ -172,7 +172,7 @@
 					<a class="quote" if={ p.repost != null }>RP:</a>
 				</div>
 				<div class="media" if={ p.media }>
-					<mk-images-viewer images={ p.media }/>
+					<mk-images images={ p.media }/>
 				</div>
 				<mk-poll if={ p.poll } post={ p } ref="pollViewer"/>
 				<span class="app" if={ p.app }>via <b>{ p.app.name }</b></span>