diff --git a/layouts/_default/list.archivehtml.html b/layouts/_default/list.archivehtml.html
index 90d9b65..7384756 100644
--- a/layouts/_default/list.archivehtml.html
+++ b/layouts/_default/list.archivehtml.html
@@ -18,7 +18,7 @@
 				{{ if .Title }}
 					<span class="p-name"><b>{{ .Title }}</b></span> 
 				{{ end }}
-				<span class="p-summary">{{ .Summary | truncate 100 }}</span>
+				<span class="p-summary">{{ .Summary | plainify | htmlUnescape | truncate 100 }}</span>
 			</p>
 			
 		{{ end }}
diff --git a/layouts/_default/list.json.json b/layouts/_default/list.json.json
index a0fea3b..c3ddf00 100644
--- a/layouts/_default/list.json.json
+++ b/layouts/_default/list.json.json
@@ -1,7 +1,7 @@
 {
   "version": "https://jsonfeed.org/version/1",
   "title": {{ if eq  .Title  .Site.Title }}{{ .Site.Title | jsonify }}{{ else }}{{ printf `%s on %s` .Title .Site.Title | jsonify }}{{ end }},
-  "icon": "{{ .Site.Author.avatar }}",
+  "icon": "{{ .Site.Params.author.avatar }}",
   "home_page_url": "{{ .Site.BaseURL }}",
   "feed_url": "{{ .Site.BaseURL }}feed.json",
   "items": [
diff --git a/layouts/_default/rss.xml b/layouts/_default/rss.xml
index 245f835..9e0e677 100644
--- a/layouts/_default/rss.xml
+++ b/layouts/_default/rss.xml
@@ -12,7 +12,7 @@
       <title>{{ .Title }}</title>
       <link>{{ .Permalink }}</link>
       <pubDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
-      {{ with .Site.Author.email }}<author>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</author>{{end}}
+      {{ with .Site.Params.author.email }}<author>{{.}}{{ with $.Site.Params.author.name }} ({{.}}){{end}}</author>{{end}}
       {{- if .Params.guid }}
       <guid>{{ .Params.guid }}</guid>
       {{- else -}}
diff --git a/layouts/index.json b/layouts/index.json
index 478be43..e30c605 100644
--- a/layouts/index.json
+++ b/layouts/index.json
@@ -1,7 +1,7 @@
 {
 	"version": "https://jsonfeed.org/version/1",
 	"title": {{ .Site.Title | jsonify }},
-	"icon": "{{ .Site.Author.avatar }}",
+	"icon": "{{ .Site.Params.author.avatar }}",
 	"home_page_url": "{{ .Site.BaseURL }}",
 	"feed_url": "{{ .Site.BaseURL }}feed.json",
 	"items": [
@@ -22,7 +22,7 @@
 				{{- $s := replace $s "\\u003e" ">" -}}
 				{{- $s := replace $s "\\u0026" "&" }}
 				"content_html": {{ $s }},
-				{{ if .Params.custom_summary }}"summary": {{ .Summary | plainify | jsonify }},{{ end }}
+				{{ if .Params.custom_summary }}"summary": {{ .Summary | plainify | htmlUnescape | jsonify }},{{ end }}
 				"date_published": "{{ .Date.Format "2006-01-02T15:04:05-07:00" }}",
 				"url": "{{ .Permalink }}"
 				{{- with .Params.categories -}}
diff --git a/layouts/index.xml b/layouts/index.xml
index 1927728..c7e0d91 100644
--- a/layouts/index.xml
+++ b/layouts/index.xml
@@ -13,7 +13,7 @@
       <title>{{ .Title }}</title>
       <link>{{ .Permalink }}</link>
       <pubDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
-      {{ with .Site.Author.email }}<author>{{.}}{{ with $.Site.Author.name }} ({{.}}){{end}}</author>{{end}}
+      {{ with .Site.Params.author.email }}<author>{{.}}{{ with $.Site.Params.author.name }} ({{.}}){{end}}</author>{{end}}
       {{- if .Params.guid }}
       <guid>{{ .Params.guid }}</guid>
       {{- else -}}
diff --git a/layouts/list.archivehtml.html b/layouts/list.archivehtml.html
index 90d9b65..7384756 100644
--- a/layouts/list.archivehtml.html
+++ b/layouts/list.archivehtml.html
@@ -18,7 +18,7 @@
 				{{ if .Title }}
 					<span class="p-name"><b>{{ .Title }}</b></span> 
 				{{ end }}
-				<span class="p-summary">{{ .Summary | truncate 100 }}</span>
+				<span class="p-summary">{{ .Summary | plainify | htmlUnescape | truncate 100 }}</span>
 			</p>
 			
 		{{ end }}
diff --git a/layouts/list.archivejson.json b/layouts/list.archivejson.json
index 970300d..688e481 100644
--- a/layouts/list.archivejson.json
+++ b/layouts/list.archivejson.json
@@ -1,7 +1,7 @@
 {
 	"version": "https://jsonfeed.org/version/1",
 	"title": {{ .Site.Title | jsonify }},
-	"icon": "{{ .Site.Author.avatar }}",
+	"icon": "{{ .Site.Params.author.avatar }}",
 	"home_page_url": "{{ .Site.BaseURL }}",
 	"feed_url": "{{ .Site.BaseURL }}photos/index.json",
 	"items": [
@@ -11,7 +11,7 @@
 			{
 				"id": "{{ .Permalink }}",
 				"title": {{ .Title | jsonify }},
-				"content_text": {{ .Summary | truncate 100 | jsonify }},
+				"content_text": {{ .Summary | plainify | htmlUnescape | truncate 100 | jsonify }},
 				"date_published": "{{ .Date.Format "2006-01-02T15:04:05-07:00" }}",
 				"url": "{{ .Permalink }}"
 			}
diff --git a/layouts/list.photosjson.json b/layouts/list.photosjson.json
index c1a4665..247efce 100644
--- a/layouts/list.photosjson.json
+++ b/layouts/list.photosjson.json
@@ -1,7 +1,7 @@
 {
 	"version": "https://jsonfeed.org/version/1",
 	"title": {{ .Site.Title | jsonify }},
-	"icon": "{{ .Site.Author.avatar }}",
+	"icon": "{{ .Site.Params.author.avatar }}",
 	"home_page_url": "{{ .Site.BaseURL }}",
 	"feed_url": "{{ .Site.BaseURL }}photos/index.json",
 	"items": [
diff --git a/layouts/list.podcastjson.json b/layouts/list.podcastjson.json
index de06b07..d488e71 100644
--- a/layouts/list.podcastjson.json
+++ b/layouts/list.podcastjson.json
@@ -1,7 +1,7 @@
 {
 	"version": "https://jsonfeed.org/version/1",
 	"title": {{ .Site.Title | jsonify }},
-	"icon": "{{ .Site.Author.avatar }}",
+	"icon": "{{ .Site.Params.author.avatar }}",
 	"home_page_url": "{{ .Site.BaseURL }}",
 	"feed_url": "{{ .Site.BaseURL }}podcast.json",
 	"_podcast": {
diff --git a/layouts/list.podcastxml.xml b/layouts/list.podcastxml.xml
index 15c3b2e..23b782f 100644
--- a/layouts/list.podcastxml.xml
+++ b/layouts/list.podcastxml.xml
@@ -26,7 +26,7 @@
 				<title>{{ .Title | htmlEscape }}</title>
 				<link>{{ .Permalink }}</link>
 				<pubDate>{{ .Date.Format "Mon, 02 Jan 2006 15:04:05 -0700" | safeHTML }}</pubDate>
-				{{ with .Site.Author.email }}<author>{{ . | htmlEscape}}{{ with $.Site.Author.name }} ({{ . | htmlEscape}}){{end}}</author>{{end}}
+				{{ with .Site.Params.author.email }}<author>{{ . | htmlEscape}}{{ with $.Site.Params.author.name }} ({{ . | htmlEscape}}){{end}}</author>{{end}}
 				<guid isPermaLink="true">{{ .Permalink }}</guid>
 				<description><![CDATA[{{ .Content }}]]></description>
 				{{ range first 1 .Params.audio_with_metadata }}
diff --git a/layouts/newsletter.html b/layouts/newsletter.html
index 0632525..02e2c78 100644
--- a/layouts/newsletter.html
+++ b/layouts/newsletter.html
@@ -14,7 +14,7 @@
 <div class="microblog_email">
 
 	<p class="microblog_header">
-	<img src="{{ .Site.Author.avatar }}" width="30" height="30" alt="Profile icon" style="border-radius: 15px; vertical-align: middle;">
+	<img src="{{ .Site.Params.author.avatar }}" width="30" height="30" alt="Profile icon" style="border-radius: 15px; vertical-align: middle;">
 	<b>{{ .Site.Title }}</b>
 	— <a href="{{ .Footer.UnsubscribeURL }}">Unsubscribe</a>
 
diff --git a/layouts/partials/microblog_head.html b/layouts/partials/microblog_head.html
index b3ed062..865e4f5 100644
--- a/layouts/partials/microblog_head.html
+++ b/layouts/partials/microblog_head.html
@@ -26,6 +26,30 @@
   <link rel="me" href="https://instagram.com/{{ . }}">
 {{ end }}
 
+{{ if .Site.Params.opengraph_is_enabled }}
+  {{ if .IsHome }}
+    <meta property="og:title" content="{{ .Site.Title }}">
+    <meta name="og:description" content="{{ .Site.Params.about_me | truncate 200 }}">
+    <meta property="og:image" content="{{ .Site.Params.author.avatar }}">
+  {{ else }}
+    <meta property="og:title" content="{{ with .Page.Title }}{{ . }}{{ else }}{{ delimit (split (.Summary | plainify) " " | first 5) " " }} …{{ end }}">
+    <meta name="og:description" content="{{ .Summary | truncate 200 }}">
+    {{ if .Params.photos }}
+      {{- range .Params.photos -}}
+        <meta property="og:image" content="{{ . }}">
+      {{- end -}}
+    {{ else }}
+      {{ with .Params.opengraph.image }}
+        <meta property="og:image" content="{{ . }}">
+      {{ end }}
+    {{ end }}
+  {{- end -}}
+
+  <meta property="og:type" content="{{ if .IsPage }}article{{ else }}website{{ end }}">
+  <meta property="og:url" content="{{ .Permalink }}">
+  <meta property="og:site_name" content="{{ .Site.Title }}">
+{{ end }}
+
 <link rel="shortcut icon" href="https://micro.blog/{{ .Site.Params.author.username }}/favicon.png" type="image/x-icon">
 <link rel="EditURI" type="application/rsd+xml" href="{{ "rsd.xml" | absURL }}">
 <link rel="authorization_endpoint" href="https://micro.blog/indieauth/auth">