diff --git a/discord_rss_bot/main.py b/discord_rss_bot/main.py
index 197d31a..f6c02db 100644
--- a/discord_rss_bot/main.py
+++ b/discord_rss_bot/main.py
@@ -308,6 +308,52 @@ async def post_create_feed(
     return RedirectResponse(url=f"/feed?feed_url={urllib.parse.quote(clean_feed_url)}", status_code=303)
 
 
+@app.post("/attach_feed_webhook")
+async def post_attach_feed_webhook(
+    feed_url: Annotated[str, Form()],
+    webhook_dropdown: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+    redirect_to: Annotated[str, Form()] = "",
+) -> RedirectResponse:
+    """Attach an existing feed to one of the configured webhooks.
+
+    Args:
+        feed_url: The feed URL to update.
+        webhook_dropdown: The webhook name selected from the dropdown.
+        reader: The Reader instance.
+        redirect_to: Optional redirect URL after update.
+
+    Returns:
+        RedirectResponse: Redirect to index or feed page.
+
+    Raises:
+        HTTPException: If feed or webhook cannot be found.
+    """
+    clean_feed_url: str = urllib.parse.unquote(feed_url.strip())
+    selected_webhook_name: str = webhook_dropdown.strip()
+
+    try:
+        reader.get_feed(clean_feed_url)
+    except FeedNotFoundError as e:
+        raise HTTPException(status_code=404, detail="Feed not found") from e
+
+    webhook_url: str = ""
+    hooks = cast("list[dict[str, str]]", list(reader.get_tag((), "webhooks", [])))
+    for hook in hooks:
+        if hook.get("name") == selected_webhook_name:
+            webhook_url = hook.get("url", "").strip()
+            break
+
+    if not webhook_url:
+        raise HTTPException(status_code=404, detail="Webhook not found")
+
+    reader.set_tag(clean_feed_url, "webhook", webhook_url)  # pyright: ignore[reportArgumentType]
+    commit_state_change(reader, f"Attach feed {clean_feed_url} to webhook {selected_webhook_name}")
+
+    redirect_url: str = redirect_to.strip() or f"/feed?feed_url={urllib.parse.quote(clean_feed_url)}"
+    return RedirectResponse(url=redirect_url, status_code=303)
+
+
 @app.post("/pause")
 async def post_pause_feed(
     feed_url: Annotated[str, Form()],
diff --git a/discord_rss_bot/templates/index.html b/discord_rss_bot/templates/index.html
index 341ec38..6c12656 100644
--- a/discord_rss_bot/templates/index.html
+++ b/discord_rss_bot/templates/index.html
@@ -133,20 +133,41 @@
                 <ul class="list-group text-danger">
                     Feeds without attached webhook:
                     {% for feed in feeds_without_attached_webhook %}
-                        <a class="text-muted" href="/feed?feed_url={{ feed.url|encode_url }}">
-                            {# Display username@youtube for YouTube feeds #}
-                            {% if "youtube.com/feeds/videos.xml" in feed.url %}
-                                {% if "user=" in feed.url %}
-                                    {{ feed.url.split("user=")[1] }}@youtube
-                                {% elif "channel_id=" in feed.url %}
-                                    {{ feed.title if feed.title else feed.url.split("channel_id=")[1] }}@youtube
+                        <li class="list-group-item bg-dark border-dark text-danger">
+                            <div class="d-flex flex-wrap align-items-center gap-2">
+                                <a class="text-muted" href="/feed?feed_url={{ feed.url|encode_url }}">
+                                    {# Display username@youtube for YouTube feeds #}
+                                    {% if "youtube.com/feeds/videos.xml" in feed.url %}
+                                        {% if "user=" in feed.url %}
+                                            {{ feed.url.split("user=")[1] }}@youtube
+                                        {% elif "channel_id=" in feed.url %}
+                                            {{ feed.title if feed.title else feed.url.split("channel_id=")[1] }}@youtube
+                                        {% else %}
+                                            {{ feed.url }}
+                                        {% endif %}
+                                    {% else %}
+                                        {{ feed.url }}
+                                    {% endif %}
+                                </a>
+                                {% if webhooks %}
+                                    <form action="/attach_feed_webhook"
+                                          method="post"
+                                          class="d-flex flex-wrap align-items-center gap-2 ms-md-auto">
+                                        <input type="hidden" name="feed_url" value="{{ feed.url }}" />
+                                        <input type="hidden" name="redirect_to" value="/" />
+                                        <select name="webhook_dropdown"
+                                                class="form-select form-select-sm bg-dark border-dark text-muted"
+                                                required>
+                                            <option value="" selected disabled>Select webhook...</option>
+                                            {% for hook in webhooks %}<option value="{{ hook.name }}">{{ hook.name }}</option>{% endfor %}
+                                        </select>
+                                        <button class="btn btn-outline-light btn-sm" type="submit">Attach</button>
+                                    </form>
                                 {% else %}
-                                    {{ feed.url }}
+                                    <span class="text-muted small">Add a webhook first to attach this feed.</span>
                                 {% endif %}
-                            {% else %}
-                                {{ feed.url }}
-                            {% endif %}
-                        </a>
+                            </div>
+                        </li>
                     {% endfor %}
                 </ul>
             </div>
diff --git a/tests/test_main.py b/tests/test_main.py
index 6c88005..e40724d 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -559,6 +559,60 @@ def test_delete_webhook() -> None:
     assert webhook_name not in response3.text, f"Webhook found in /webhooks: {response3.text}"
 
 
+def test_attach_feed_webhook_from_index() -> None:
+    """Feeds without attached webhook should be attachable from the index page."""
+    original_webhook_name = "original-webhook"
+    original_webhook_url = "https://discord.com/api/webhooks/111/original"
+    replacement_webhook_name = "replacement-webhook"
+    replacement_webhook_url = "https://discord.com/api/webhooks/222/replacement"
+
+    # Start clean.
+    client.post(url="/remove", data={"feed_url": feed_url})
+    client.post(url="/delete_webhook", data={"webhook_url": original_webhook_url})
+    client.post(url="/delete_webhook", data={"webhook_url": replacement_webhook_url})
+
+    # Add a webhook and a feed attached to it.
+    response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": original_webhook_name, "webhook_url": original_webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add original webhook: {response.text}"
+
+    response = client.post(url="/add", data={"feed_url": feed_url, "webhook_dropdown": original_webhook_name})
+    assert response.status_code == 200, f"Failed to add feed: {response.text}"
+
+    # Remove the original webhook so feed becomes "without attached webhook".
+    response = client.post(url="/delete_webhook", data={"webhook_url": original_webhook_url})
+    assert response.status_code == 200, f"Failed to delete original webhook: {response.text}"
+
+    # Add a replacement webhook we can attach to.
+    response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": replacement_webhook_name, "webhook_url": replacement_webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add replacement webhook: {response.text}"
+
+    # The feed should now be listed in "Feeds without attached webhook" section.
+    response = client.get(url="/")
+    assert response.status_code == 200, f"Failed to get /: {response.text}"
+    assert "Feeds without attached webhook:" in response.text
+    assert "/attach_feed_webhook" in response.text
+
+    # Attach the feed to the new webhook.
+    response = client.post(
+        url="/attach_feed_webhook",
+        data={"feed_url": feed_url, "webhook_dropdown": replacement_webhook_name, "redirect_to": "/"},
+    )
+    assert response.status_code == 200, f"Failed to attach feed to webhook: {response.text}"
+
+    reader = get_reader_dependency()
+    assert reader.get_tag(feed_url, "webhook", "") == replacement_webhook_url
+
+    # Cleanup.
+    client.post(url="/remove", data={"feed_url": feed_url})
+    client.post(url="/delete_webhook", data={"webhook_url": replacement_webhook_url})
+
+
 def test_update_feed_not_found() -> None:
     """Test updating a non-existent feed."""
     # Generate a feed URL that does not exist