diff --git a/crates/app/src/public/html/auth/base.html b/crates/app/src/public/html/auth/base.html
index 40ebd28..c1531c0 100644
--- a/crates/app/src/public/html/auth/base.html
+++ b/crates/app/src/public/html/auth/base.html
@@ -1,4 +1,4 @@
-{% extends "root.html" %} {% block body %}
+{% import "macros.html" as macros %} {% extends "root.html" %} {% block body %}
 <main class="flex flex-col gap-2" style="max-width: 25rem">
     <h2 class="w-full text-center">{% block title %}{% endblock %}</h2>
     <div class="card w-full flex flex-col gap-4 justify-center align-center">
diff --git a/crates/app/src/public/html/communities/base.html b/crates/app/src/public/html/communities/base.html
index f189f26..74000d4 100644
--- a/crates/app/src/public/html/communities/base.html
+++ b/crates/app/src/public/html/communities/base.html
@@ -16,13 +16,26 @@
                         community=community, size="72px") }}
                         <div class="flex flex-col">
                             <div class="flex gap-2 items-center">
-                                <h3 id="title" class="title name shorter">
+                                <h3
+                                    id="title"
+                                    class="title name shorter flex gap-2"
+                                >
                                     <!-- prettier-ignore -->
                                     {% if community.context.display_name %}
                                         {{ community.context.display_name }}
                                     {% else %}
                                         {{ community.title }}
                                     {% endif %}
+
+                                    {% if community.context.is_nsfw %}
+                                    <span
+                                        title="NSFW community"
+                                        class="flex items-center"
+                                        style="color: var(--color-primary)"
+                                    >
+                                        {{ icon "square-asterisk" }}
+                                    </span>
+                                    {% endif %}
                                 </h3>
 
                                 {% if user %} {% if user.id != community.owner
diff --git a/crates/app/src/public/html/communities/post.html b/crates/app/src/public/html/communities/post.html
index b9b8314..b573e1d 100644
--- a/crates/app/src/public/html/communities/post.html
+++ b/crates/app/src/public/html/communities/post.html
@@ -116,6 +116,11 @@
                         "{{ post.context.comments_enabled }}",
                         "checkbox",
                     ],
+                    [
+                        ["is_nsfw", "Mark as NSFW"],
+                        "{{ community.context.is_nsfw }}",
+                        "checkbox",
+                    ],
                 ];
 
                 if (can_manage_pins) {
diff --git a/crates/app/src/public/html/communities/settings.html b/crates/app/src/public/html/communities/settings.html
index 36d8c27..dbba102 100644
--- a/crates/app/src/public/html/communities/settings.html
+++ b/crates/app/src/public/html/communities/settings.html
@@ -548,6 +548,11 @@
                     "{{ community.context.description }}",
                     "textarea",
                 ],
+                [
+                    ["is_nsfw", "Mark as NSFW"],
+                    "{{ community.context.is_nsfw }}",
+                    "checkbox",
+                ],
             ],
             settings,
         );
diff --git a/crates/app/src/public/html/components.html b/crates/app/src/public/html/components.html
index 4356ccd..b532f78 100644
--- a/crates/app/src/public/html/components.html
+++ b/crates/app/src/public/html/components.html
@@ -157,6 +157,14 @@ show_community and post.community != config.town_square %}
                             {{ components::community_avatar(id=post.community) }}
                         {% endif %}
                     </a>
+                    {% endif %} {% if post.context.is_nsfw %}
+                    <span
+                        title="NSFW post"
+                        class="flex items-center"
+                        style="color: var(--color-primary)"
+                    >
+                        {{ icon "square-asterisk" }}
+                    </span>
                     {% endif %}
                 </div>
 
@@ -389,7 +397,7 @@ config.town_square and user %}
 
     <form
         class="card flex flex-col gap-2"
-        onsubmit="create_post_from_form(event)"
+        onsubmit="create_post_from_form_town_square(event)"
     >
         <div class="flex flex-col gap-1">
             <label for="content">{{ text "communities:label.content" }}</label>
@@ -409,7 +417,7 @@ config.town_square and user %}
 </div>
 
 <script>
-    async function create_post_from_form(e) {
+    async function create_post_from_form_town_square(e) {
         e.preventDefault();
         await trigger("atto::debounce", ["posts::create"]);
         fetch("/api/v1/posts", {
diff --git a/crates/core/src/database/communities.rs b/crates/core/src/database/communities.rs
index c1d7627..43038c6 100644
--- a/crates/core/src/database/communities.rs
+++ b/crates/core/src/database/communities.rs
@@ -133,7 +133,7 @@ impl DataManager {
 
         let res = query_rows!(
             &conn,
-            "SELECT * FROM communities ORDER BY member_count DESC LIMIT 12",
+            "SELECT * FROM communities WHERE NOT context LIKE '%\"is_nsfw\":true%' ORDER BY member_count DESC LIMIT 12",
             empty,
             |x| { Self::get_community_from_row(x) }
         );
diff --git a/crates/core/src/database/posts.rs b/crates/core/src/database/posts.rs
index b5d39fd..f8ee3ec 100644
--- a/crates/core/src/database/posts.rs
+++ b/crates/core/src/database/posts.rs
@@ -144,7 +144,7 @@ impl DataManager {
 
         let res = query_rows!(
             &conn,
-            "SELECT * FROM posts WHERE owner = $1 AND NOT context LIKE '%\"is_profile_pinned\":true%' ORDER BY created DESC LIMIT $2 OFFSET $3",
+            "SELECT * FROM posts WHERE owner = $1 AND NOT context LIKE '%\"is_profile_pinned\":true%' AND NOT context LIKE '%\"is_nsfw\":true%' ORDER BY created DESC LIMIT $2 OFFSET $3",
             &[&(id as i64), &(batch as i64), &((page * batch) as i64)],
             |x| { Self::get_post_from_row(x) }
         );
@@ -248,7 +248,7 @@ impl DataManager {
 
         let res = query_rows!(
             &conn,
-            "SELECT * FROM posts WHERE replying_to = 0 ORDER BY likes DESC, created ASC LIMIT $1 OFFSET $2",
+            "SELECT * FROM posts WHERE replying_to = 0 AND NOT context LIKE '%\"is_nsfw\":true%' ORDER BY likes DESC, created ASC LIMIT $1 OFFSET $2",
             &[&(batch as i64), &((page * batch) as i64)],
             |x| { Self::get_post_from_row(x) }
         );
@@ -358,6 +358,9 @@ impl DataManager {
             return Err(Error::NotAllowed);
         }
 
+        // mirror nsfw state
+        data.context.is_nsfw = community.context.is_nsfw;
+
         // check if we're blocked
         if let Some(replying_to) = data.replying_to {
             if let Ok(_) = self
diff --git a/crates/core/src/model/communities.rs b/crates/core/src/model/communities.rs
index 348a262..aacb1ac 100644
--- a/crates/core/src/model/communities.rs
+++ b/crates/core/src/model/communities.rs
@@ -72,8 +72,12 @@ impl Community {
 
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct CommunityContext {
+    #[serde(default)]
     pub display_name: String,
+    #[serde(default)]
     pub description: String,
+    #[serde(default)]
+    pub is_nsfw: bool,
 }
 
 impl Default for CommunityContext {
@@ -81,6 +85,7 @@ impl Default for CommunityContext {
         Self {
             display_name: String::new(),
             description: String::new(),
+            is_nsfw: false,
         }
     }
 }
@@ -171,6 +176,8 @@ pub struct PostContext {
     pub is_profile_pinned: bool,
     #[serde(default)]
     pub edited: usize,
+    #[serde(default)]
+    pub is_nsfw: bool,
 }
 
 fn default_comments_enabled() -> bool {
@@ -184,6 +191,7 @@ impl Default for PostContext {
             is_pinned: false,
             is_profile_pinned: false,
             edited: 0,
+            is_nsfw: false,
         }
     }
 }