diff --git a/app/src/main/java/com/jerboa/ui/components/post/composables/PostComposables.kt b/app/src/main/java/com/jerboa/ui/components/post/composables/PostComposables.kt
new file mode 100644
index 000000000..aba6fe853
--- /dev/null
+++ b/app/src/main/java/com/jerboa/ui/components/post/composables/PostComposables.kt
@@ -0,0 +1,32 @@
+package com.jerboa.ui.components.post.composables
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.material3.Checkbox
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import com.jerboa.R
+
+@Composable
+fun CheckboxIsNsfw(
+    checked: Boolean,
+    onCheckedChange: (checked: Boolean) -> Unit,
+) {
+    Row(
+        verticalAlignment = Alignment.CenterVertically,
+        horizontalArrangement = Arrangement.SpaceBetween,
+        modifier = Modifier.fillMaxWidth(),
+    ) {
+        Text(
+            text = stringResource(R.string.create_post_tag_nsfw),
+        )
+        Checkbox(
+            checked = checked,
+            onCheckedChange = onCheckedChange,
+        )
+    }
+}
diff --git a/app/src/main/java/com/jerboa/ui/components/post/create/CreatePost.kt b/app/src/main/java/com/jerboa/ui/components/post/create/CreatePost.kt
index a987bd0a3..278216177 100644
--- a/app/src/main/java/com/jerboa/ui/components/post/create/CreatePost.kt
+++ b/app/src/main/java/com/jerboa/ui/components/post/create/CreatePost.kt
@@ -43,6 +43,7 @@ import com.jerboa.db.Account
 import com.jerboa.ui.components.common.CircularIcon
 import com.jerboa.ui.components.common.MarkdownTextField
 import com.jerboa.ui.components.common.PickImage
+import com.jerboa.ui.components.post.composables.CheckboxIsNsfw
 import com.jerboa.ui.theme.ICON_SIZE
 import com.jerboa.ui.theme.MEDIUM_PADDING
 import com.jerboa.ui.theme.THUMBNAIL_SIZE
@@ -120,6 +121,8 @@ fun CreatePostBody(
     padding: PaddingValues,
     suggestedTitle: String?,
     suggestedTitleLoading: Boolean,
+    isNsfw: Boolean,
+    onIsNsfwChange: (isNsfw: Boolean) -> Unit,
 ) {
     val nameField = validatePostName(name)
     val urlField = validateUrl(url)
@@ -237,6 +240,10 @@ fun CreatePostBody(
                     },
             )
         }
+        CheckboxIsNsfw(
+            checked = isNsfw,
+            onCheckedChange = onIsNsfwChange,
+        )
     }
 }
 
@@ -267,6 +274,8 @@ fun CreatePostBodyPreview() {
         padding = PaddingValues(),
         suggestedTitle = null,
         suggestedTitleLoading = false,
+        isNsfw = false,
+        onIsNsfwChange = {},
     )
 }
 
@@ -286,5 +295,7 @@ fun CreatePostBodyPreviewNoCommunity() {
         suggestedTitleLoading = false,
         account = null,
         padding = PaddingValues(),
+        isNsfw = false,
+        onIsNsfwChange = {},
     )
 }
diff --git a/app/src/main/java/com/jerboa/ui/components/post/create/CreatePostActivity.kt b/app/src/main/java/com/jerboa/ui/components/post/create/CreatePostActivity.kt
index 7d4f62ec1..92acee8c1 100644
--- a/app/src/main/java/com/jerboa/ui/components/post/create/CreatePostActivity.kt
+++ b/app/src/main/java/com/jerboa/ui/components/post/create/CreatePostActivity.kt
@@ -60,6 +60,7 @@ fun CreatePostActivity(
             ),
         )
     }
+    var isNsfw by rememberSaveable { mutableStateOf(false) }
     var formValid by rememberSaveable { mutableStateOf(false) }
 
     LaunchedEffect(initialUrl) {
@@ -107,6 +108,7 @@ fun CreatePostActivity(
                                             url = urlOut,
                                             body = bodyOut,
                                             auth = acct.jwt,
+                                            nsfw = isNsfw,
                                         ),
                                         navController,
                                     )
@@ -154,6 +156,8 @@ fun CreatePostActivity(
                     },
                     account = account,
                     padding = padding,
+                    isNsfw = isNsfw,
+                    onIsNsfwChange = { isNsfw = it },
                 )
             },
         )
diff --git a/app/src/main/java/com/jerboa/ui/components/post/edit/PostEdit.kt b/app/src/main/java/com/jerboa/ui/components/post/edit/PostEdit.kt
index bbb5aeadd..db0c6fa84 100644
--- a/app/src/main/java/com/jerboa/ui/components/post/edit/PostEdit.kt
+++ b/app/src/main/java/com/jerboa/ui/components/post/edit/PostEdit.kt
@@ -26,6 +26,7 @@ import com.jerboa.R
 import com.jerboa.db.Account
 import com.jerboa.ui.components.common.MarkdownTextField
 import com.jerboa.ui.components.common.PickImage
+import com.jerboa.ui.components.post.composables.CheckboxIsNsfw
 import com.jerboa.ui.theme.MEDIUM_PADDING
 import com.jerboa.validatePostName
 import com.jerboa.validateUrl
@@ -91,6 +92,8 @@ fun EditPostBody(
     formValid: (valid: Boolean) -> Unit,
     account: Account?,
     modifier: Modifier = Modifier,
+    isNsfw: Boolean,
+    onIsNsfwChange: (isNsfw: Boolean) -> Unit,
 ) {
     val nameField = validatePostName(name)
     val urlField = validateUrl(url)
@@ -144,6 +147,10 @@ fun EditPostBody(
             focusImmediate = false,
             placeholder = stringResource(R.string.post_edit_body_placeholder),
         )
+        CheckboxIsNsfw(
+            checked = isNsfw,
+            onCheckedChange = onIsNsfwChange,
+        )
     }
 }
 
@@ -160,5 +167,7 @@ fun EditPostBodyPreview() {
         onPickedImage = {},
         onUrlChange = {},
         account = null,
+        isNsfw = false,
+        onIsNsfwChange = {},
     )
 }
diff --git a/app/src/main/java/com/jerboa/ui/components/post/edit/PostEditActivity.kt b/app/src/main/java/com/jerboa/ui/components/post/edit/PostEditActivity.kt
index afd29e216..953fcff6e 100644
--- a/app/src/main/java/com/jerboa/ui/components/post/edit/PostEditActivity.kt
+++ b/app/src/main/java/com/jerboa/ui/components/post/edit/PostEditActivity.kt
@@ -50,6 +50,7 @@ fun PostEditActivity(
     val pv = postEditViewModel.postView
     var name by rememberSaveable { mutableStateOf(pv?.post?.name.orEmpty()) }
     var url by rememberSaveable { mutableStateOf(pv?.post?.url.orEmpty()) }
+    var isNsfw by rememberSaveable { mutableStateOf(pv?.post?.nsfw ?: false) }
     var body by rememberSaveable(stateSaver = TextFieldValue.Saver) {
         mutableStateOf(
             TextFieldValue(
@@ -84,6 +85,7 @@ fun PostEditActivity(
                                     url = urlOut,
                                     body = bodyOut,
                                     auth = acct.jwt,
+                                    nsfw = isNsfw,
                                 ),
                                 navController = navController,
                                 postViewModel = postViewModel,
@@ -120,6 +122,8 @@ fun PostEditActivity(
                 modifier = Modifier
                     .padding(padding)
                     .imePadding(),
+                isNsfw = isNsfw,
+                onIsNsfwChange = { isNsfw = it },
             )
         },
     )
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 966cedf60..14a0604e8 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -312,4 +312,5 @@
     <string name="inbox_activity_mentions">Erwähnungen</string>
     <string name="inbox_activity_messages">Nachrichten</string>
     <string name="bookmarks_activity_saved">Gespeichert</string>
+    <string name="create_post_tag_nsfw">Markiere Post als NSFW</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ce5c1e5d2..de7e04f19 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -117,6 +117,7 @@
     <string name="create_post_community">Community</string>
     <string name="create_post_copy_suggested_title">copy suggested title: %1$s</string>
     <string name="create_post_create_post">Create post</string>
+    <string name="create_post_tag_nsfw">Mark post as NSFW</string>
     <string name="create_report_back">Back</string>
     <string name="create_report_report">Report</string>
     <string name="create_report_type_your_reason">Type your reason</string>