diff --git a/src/api/client.js b/src/api/client.js
index 576b1ba..5817c22 100644
--- a/src/api/client.js
+++ b/src/api/client.js
@@ -229,6 +229,24 @@ export async function fetchPostById(postId) {
   }
 }
 
+export async function updatePostVisibility(postId, payload = {}, token) {
+  if (!postId) throw new Error("post_id required");
+  const headers = { "Content-Type": "application/json" };
+  if (token) headers["Authorization"] = `Bearer ${token}`;
+  const body = JSON.stringify({ post_id: postId, ...payload });
+  const res = await fetch(`${API_BASE}/post/visibility`, {
+    method: "PATCH",
+    headers,
+    credentials: "include",
+    body,
+  });
+  if (!res.ok) {
+    const text = await res.text().catch(() => "");
+    throw new Error(text || `HTTP ${res.status}`);
+  }
+  return res.json().catch(() => ({}));
+}
+
 
 
 /**
diff --git a/src/components/Island/IslandViewer.jsx b/src/components/Island/IslandViewer.jsx
index 5037097..aa2862f 100644
--- a/src/components/Island/IslandViewer.jsx
+++ b/src/components/Island/IslandViewer.jsx
@@ -1,7 +1,9 @@
-import React, { useEffect, useRef } from 'react';
+import React, { useEffect, useRef, useState } from 'react';
 import maplibregl from 'maplibre-gl';
 import 'maplibre-gl/dist/maplibre-gl.css';
 import '../../styles/island.css';
+import { uploadProfileAvatar } from '../../api/client';
+import { useAuth } from '../../auth/AuthContext';
 
 /**
  * IslandViewer: 2.5D immersive island visualization using MapLibre
@@ -11,6 +13,12 @@ export default function IslandViewer({ island, onClose }) {
   const containerRef = useRef(null);
   const mapRef = useRef(null);
   const animationRef = useRef(null);
+  const fileRef = useRef(null);
+  const { authenticated, username, setAvatarUrl } = useAuth();
+  const [uploading, setUploading] = useState(false);
+  const [avatarVisibility, setAvatarVisibility] = useState("public");
+  const [avatarGroupId, setAvatarGroupId] = useState("");
+  const [avatarUsers, setAvatarUsers] = useState("");
 
   useEffect(() => {
     if (!island || !containerRef.current) return;
@@ -131,6 +139,9 @@ export default function IslandViewer({ island, onClose }) {
   }, [island]);
 
   if (!island) return null;
+  const isSelf =
+    authenticated && username && island.username &&
+    username.toLowerCase() === island.username.toLowerCase();
 
   return (
     <div className="island-viewer-modal" onClick={onClose}>
@@ -142,6 +153,91 @@ export default function IslandViewer({ island, onClose }) {
           <p>{island.bio || 'Welcome to my island'}</p>
         </div>
 
+        <div className="island-profile-panel">
+          <div className="island-profile-avatar">
+            {island.avatar_url ? (
+              <img src={island.avatar_url} alt={island.username} />
+            ) : (
+              <div className="island-profile-letter">
+                {(island.username || "U")[0].toUpperCase()}
+              </div>
+            )}
+          </div>
+          <div className="island-profile-meta">
+            <div className="island-profile-name">@{island.username}</div>
+            {isSelf ? (
+              <div className="island-profile-actions">
+                <div className="island-profile-row">
+                  <label>Photo visibility</label>
+                  <select
+                    value={avatarVisibility}
+                    onChange={(e) => {
+                      const next = e.target.value;
+                      setAvatarVisibility(next);
+                      if (next !== "group") setAvatarGroupId("");
+                      if (next !== "custom") setAvatarUsers("");
+                    }}
+                  >
+                    <option value="public">Public</option>
+                    <option value="private">Private</option>
+                    <option value="group">Group</option>
+                    <option value="custom">Custom</option>
+                  </select>
+                </div>
+                {avatarVisibility === "group" ? (
+                  <input
+                    className="island-profile-input"
+                    placeholder="Group ID"
+                    value={avatarGroupId}
+                    onChange={(e) => setAvatarGroupId(e.target.value)}
+                  />
+                ) : null}
+                {avatarVisibility === "custom" ? (
+                  <input
+                    className="island-profile-input"
+                    placeholder="Usernames (comma separated)"
+                    value={avatarUsers}
+                    onChange={(e) => setAvatarUsers(e.target.value)}
+                  />
+                ) : null}
+                <button
+                  type="button"
+                  className="island-profile-btn"
+                  disabled={uploading}
+                  onClick={() => fileRef.current && fileRef.current.click()}
+                >
+                  {uploading ? "Uploading..." : "Change photo"}
+                </button>
+                <input
+                  ref={fileRef}
+                  type="file"
+                  accept="image/*"
+                  style={{ display: "none" }}
+                  onChange={async (e) => {
+                    const file = e.target.files && e.target.files[0];
+                    if (!file) return;
+                    setUploading(true);
+                    const users = avatarUsers
+                      .split(",")
+                      .map((u) => u.trim())
+                      .filter(Boolean);
+                    const res = await uploadProfileAvatar(file, {
+                      visibility: avatarVisibility,
+                      group_id: avatarGroupId.trim(),
+                      users,
+                    });
+                    if (res && res.ok && res.avatar_url) {
+                      island.avatar_url = res.avatar_url;
+                      if (setAvatarUrl) setAvatarUrl(res.avatar_url);
+                    }
+                    setUploading(false);
+                  }}
+                />
+              </div>
+            ) : null}
+          </div>
+        </div>
+
         <div
           ref={containerRef}
           className="island-viewer-canvas"
@@ -402,4 +498,3 @@ function seededRandom(seed) {
     return s / 233280;
   };
 }
-
diff --git a/src/components/Map/MapView.jsx b/src/components/Map/MapView.jsx
index dede66b..ae8a193 100644
--- a/src/components/Map/MapView.jsx
+++ b/src/components/Map/MapView.jsx
@@ -121,6 +121,9 @@ export default function MapView({
   const [draftImageFile, setDraftImageFile] = useState(null);
   const [draftImagePreview, setDraftImagePreview] = useState("");
   const [useCustomImage, setUseCustomImage] = useState(false);
+  const [postVisibility, setPostVisibility] = useState("public");
+  const [postGroupId, setPostGroupId] = useState("");
+  const [postUsers, setPostUsers] = useState("");
   const [imageVisibility, setImageVisibility] = useState("public");
   const [imageGroupId, setImageGroupId] = useState("");
   const [imageUsers, setImageUsers] = useState("");
@@ -496,6 +499,9 @@ export default function MapView({
     setDraftImageFile(null);
     setDraftImagePreview("");
     setUseCustomImage(false);
+    setPostVisibility("public");
+    setPostGroupId("");
+    setPostUsers("");
     setImageVisibility("public");
     setImageGroupId("");
     setImageUsers("");
@@ -640,6 +646,12 @@ export default function MapView({
         lat,
         lon: lng,
         author: authorName,
+        visibility: postVisibility,
+        group_id: postGroupId.trim(),
+        users: postUsers
+          .split(",")
+          .map((u) => u.trim())
+          .filter(Boolean),
       };
 
       if (useCustomImage && draftImage.trim()) {
@@ -816,6 +828,40 @@ export default function MapView({
               onChange={(e) => setDraftBody(e.target.value)}
             />
 
+            <div className="create-privacy-row">
+              <label>Post visibility</label>
+              <select
+                value={postVisibility}
+                onChange={(e) => {
+                  const next = e.target.value;
+                  setPostVisibility(next);
+                  if (next !== "group") setPostGroupId("");
+                  if (next !== "custom") setPostUsers("");
+                }}
+              >
+                <option value="public">Public</option>
+                <option value="private">Private</option>
+                <option value="group">Group</option>
+                <option value="custom">Custom</option>
+              </select>
+            </div>
+            {postVisibility === "group" ? (
+              <input
+                className="create-input"
+                placeholder="Group ID"
+                value={postGroupId}
+                onChange={(e) => setPostGroupId(e.target.value)}
+              />
+            ) : null}
+            {postVisibility === "custom" ? (
+              <input
+                className="create-input"
+                placeholder="Usernames (comma separated)"
+                value={postUsers}
+                onChange={(e) => setPostUsers(e.target.value)}
+              />
+            ) : null}
+
             <div className="create-image-option">
               <label style={{ display: "flex", alignItems: "center", gap: "8px", cursor: "pointer" }}>
                 <input
diff --git a/src/components/Posts/PostCard.jsx b/src/components/Posts/PostCard.jsx
index cd53770..d1b6271 100644
--- a/src/components/Posts/PostCard.jsx
+++ b/src/components/Posts/PostCard.jsx
@@ -4,7 +4,9 @@ import {
   fetchPostLikeState,
   recordPostShare,
   togglePostLike,
+  updatePostVisibility,
 } from "../../api/client";
+import { useAuth } from "../../auth/AuthContext";
 
 function isAuthed() {
   try {
@@ -105,11 +107,23 @@ export default function PostCard({ post, selected, onSelect }) {
   const [liked, setLiked] = useState(false);
   const [authed, setAuthed] = useState(isAuthed());
   const [imgFailed, setImgFailed] = useState(false);
+  const [showPrivacy, setShowPrivacy] = useState(false);
+  const [privacySaving, setPrivacySaving] = useState(false);
+  const [privacyError, setPrivacyError] = useState("");
+  const [postVisibility, setPostVisibility] = useState(
+    (post?.visibility || "public").toString()
+  );
+  const [postGroupId, setPostGroupId] = useState(
+    (post?.group_id || "").toString()
+  );
+  const [postUsers, setPostUsers] = useState("");
+  const [applyToImages, setApplyToImages] = useState(true);
   const [counts, setCounts] = useState(() => ({
     like: post?.like_count ?? 0,
     comment: post?.comment_count ?? 0,
     share: post?.share_count ?? 0,
   }));
+  const { username, token } = useAuth();
 
   const postId = post?.id ?? post?._id ?? 0;
 
@@ -142,12 +156,18 @@ export default function PostCard({ post, selected, onSelect }) {
       share: post?.share_count ?? 0,
     });
   }, [post?.like_count, post?.comment_count, post?.share_count]);
+  useEffect(() => {
+    setPostVisibility((post?.visibility || "public").toString());
+    setPostGroupId((post?.group_id || "").toString());
+  }, [post?.visibility, post?.group_id]);
 
   const rawImg = post?.image_large || post?.image_small || post?.image || post?.media_url || "";
   const img = normalizeImageUrl(rawImg);
   const title = post?.title || "Untitled";
   const snippet = post?.snippet || "";
   const author = (post?.author || post?.Author || "anon").toString();
+  const isAuthor =
+    username && author && author.toLowerCase() === username.toLowerCase();
   const sub = (post?.sub_category || post?.subCategory || "").toString();
   const timeAgo = formatRelativeTime(post?.created_at || post?.CreatedAt || post?.createdAt);
   const cat = categoryLabel(post);
@@ -264,7 +284,98 @@ export default function PostCard({ post, selected, onSelect }) {
         >
           <i className="fa-solid fa-share-nodes" /> Share
         </button>
+
+        {isAuthor ? (
+          <button
+            type="button"
+            className={"sw-wall-btn" + (showPrivacy ? " is-active" : "")}
+            onClick={(e) => {
+              e.stopPropagation();
+              setShowPrivacy((prev) => !prev);
+            }}
+          >
+            <i className="fa-solid fa-lock" /> Visibility
+          </button>
+        ) : null}
       </div>
+
+      {isAuthor && showPrivacy ? (
+        <div className="sw-wall-privacy" onClick={(e) => e.stopPropagation()}>
+          <div className="sw-wall-privacy-row">
+            <label>Post</label>
+            <select
+              value={postVisibility}
+              onChange={(e) => {
+                const next = e.target.value;
+                setPostVisibility(next);
+                if (next !== "group") setPostGroupId("");
+                if (next !== "custom") setPostUsers("");
+              }}
+            >
+              <option value="public">Public</option>
+              <option value="private">Private</option>
+              <option value="group">Group</option>
+              <option value="custom">Custom</option>
+            </select>
+          </div>
+          {postVisibility === "group" ? (
+            <input
+              className="sw-wall-privacy-input"
+              placeholder="Group ID"
+              value={postGroupId}
+              onChange={(e) => setPostGroupId(e.target.value)}
+            />
+          ) : null}
+          {postVisibility === "custom" ? (
+            <input
+              className="sw-wall-privacy-input"
+              placeholder="Usernames (comma separated)"
+              value={postUsers}
+              onChange={(e) => setPostUsers(e.target.value)}
+            />
+          ) : null}
+          <label className="sw-wall-privacy-check">
+            <input
+              type="checkbox"
+              checked={applyToImages}
+              onChange={(e) => setApplyToImages(e.target.checked)}
+            />
+            Apply same visibility to images
+          </label>
+          {privacyError ? <div className="sw-wall-privacy-error">{privacyError}</div> : null}
+          <button
+            type="button"
+            className="sw-wall-btn"
+            disabled={privacySaving}
+            onClick={async () => {
+              setPrivacyError("");
+              setPrivacySaving(true);
+              try {
+                const payload = {
+                  visibility: postVisibility,
+                  group_id: postGroupId.trim(),
+                  users: postUsers
+                    .split(",")
+                    .map((u) => u.trim())
+                    .filter(Boolean),
+                };
+                if (applyToImages) {
+                  payload.image_visibility = postVisibility;
+                  payload.image_group_id = postGroupId.trim();
+                  payload.image_users = payload.users;
+                }
+                await updatePostVisibility(postId, payload, token);
+                setPrivacySaving(false);
+              } catch (err) {
+                setPrivacyError("Failed to update visibility.");
+                setPrivacySaving(false);
+              }
+            }}
+          >
+            {privacySaving ? "Saving..." : "Save"}
+          </button>
+        </div>
+      ) : null}
     </article>
   );
 }
diff --git a/src/styles/island.css b/src/styles/island.css
index 06129cf..0aa1ae4 100644
--- a/src/styles/island.css
+++ b/src/styles/island.css
@@ -128,6 +128,94 @@
   text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
 }
 
+/* Profile panel */
+.island-profile-panel {
+  display: flex;
+  gap: 1rem;
+  align-items: center;
+  padding: 0.75rem 1rem;
+  border-radius: 14px;
+  border: 1px solid rgba(148, 163, 184, 0.2);
+  background: rgba(15, 23, 42, 0.6);
+  margin-bottom: 1.5rem;
+}
+.island-profile-avatar {
+  width: 64px;
+  height: 64px;
+  border-radius: 999px;
+  overflow: hidden;
+  border: 1px solid rgba(56, 189, 248, 0.6);
+  background: rgba(56, 189, 248, 0.2);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+.island-profile-avatar img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+.island-profile-letter {
+  color: #e2f2ff;
+  font-weight: 800;
+  font-size: 1.4rem;
+}
+.island-profile-meta {
+  flex: 1;
+  min-width: 0;
+}
+.island-profile-name {
+  font-size: 0.95rem;
+  font-weight: 800;
+  color: #e2e8f0;
+  margin-bottom: 0.35rem;
+}
+.island-profile-actions {
+  display: flex;
+  flex-direction: column;
+  gap: 0.35rem;
+}
+.island-profile-row {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  font-size: 0.75rem;
+  color: #cbd5f5;
+}
+.island-profile-row select {
+  flex: 1;
+  background: rgba(15, 23, 42, 0.6);
+  border: 1px solid rgba(148, 163, 184, 0.4);
+  color: #e2e8f0;
+  border-radius: 999px;
+  padding: 0.2rem 0.6rem;
+  font-size: 0.72rem;
+}
+.island-profile-input {
+  width: 100%;
+  background: rgba(15, 23, 42, 0.6);
+  border: 1px solid rgba(148, 163, 184, 0.4);
+  color: #e2e8f0;
+  border-radius: 10px;
+  padding: 0.35rem 0.6rem;
+  font-size: 0.72rem;
+}
+.island-profile-btn {
+  align-self: flex-start;
+  border: 1px solid rgba(56, 189, 248, 0.6);
+  background: rgba(56, 189, 248, 0.2);
+  color: #e2f2ff;
+  font-weight: 800;
+  font-size: 0.72rem;
+  padding: 0.35rem 0.8rem;
+  border-radius: 999px;
+  cursor: pointer;
+}
+.island-profile-btn:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
 /* Canvas */
 
 .island-viewer-canvas {
diff --git a/src/styles/posts.css b/src/styles/posts.css
index 93ece2f..cc19519 100644
--- a/src/styles/posts.css
+++ b/src/styles/posts.css
@@ -169,6 +169,55 @@ body[data-theme="light"] .sw-wall-image-fallback{
   gap:.4rem;
   flex-wrap:wrap;
 }
+.sw-wall-privacy{
+  margin-top:.25rem;
+  padding:.5rem .6rem;
+  border-radius:12px;
+  border:1px solid rgba(148,163,184,0.35);
+  background: rgba(15,23,42,0.75);
+  display:flex;
+  flex-direction:column;
+  gap:.4rem;
+}
+.sw-wall-privacy-row{
+  display:flex;
+  align-items:center;
+  gap:.5rem;
+  font-size:.72rem;
+  color:#cbd5f5;
+}
+.sw-wall-privacy-row label{
+  white-space:nowrap;
+}
+.sw-wall-privacy-row select{
+  flex:1;
+  background:#020617;
+  border-radius:999px;
+  border:1px solid #4b5563;
+  padding:.25rem .6rem;
+  font-size:.72rem;
+  color:#e5e7eb;
+}
+.sw-wall-privacy-input{
+  width:100%;
+  border-radius:999px;
+  border:1px solid #4b5563;
+  padding:.3rem .6rem;
+  background:#020617;
+  color:#e5e7eb;
+  font-size:.72rem;
+}
+.sw-wall-privacy-check{
+  display:flex;
+  align-items:center;
+  gap:.45rem;
+  font-size:.7rem;
+  color:#cbd5f5;
+}
+.sw-wall-privacy-error{
+  font-size:.7rem;
+  color:#fca5a5;
+}
 
 .sw-wall-sentinel{
   height: 1px;