diff --git a/.github/workflows/deploy-to-pages.yml b/.github/workflows/deploy-to-pages.yml
new file mode 100644
index 0000000..0b923e2
--- /dev/null
+++ b/.github/workflows/deploy-to-pages.yml
@@ -0,0 +1,51 @@
+name: Deploy to Pages
+
+on:
+  # Runs on pushes targeting the default branch
+  # push:
+  #   branches: ["main"]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+env:
+  CARGO_TERM_COLOR: always
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
+# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  # Single deploy job since we're just deploying
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+      - name: Install Trunk
+        uses: jetli/trunk-action@v0.5.0
+      - name: Build
+        run: trunk build --release --no-default-features
+        working-directory: client
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: client/dist
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4
diff --git a/client/Cargo.toml b/client/Cargo.toml
index 10f6bd8..1957429 100644
--- a/client/Cargo.toml
+++ b/client/Cargo.toml
@@ -21,5 +21,9 @@ web-sys = { version = "0.3.72", features = [
     "TextMetrics",
 ] }
 
+[features]
+default = ["online"]
+online = []
+
 [lints]
 workspace = true
diff --git a/client/src/dialog.rs b/client/src/dialog.rs
index a3672ef..946f831 100644
--- a/client/src/dialog.rs
+++ b/client/src/dialog.rs
@@ -117,7 +117,10 @@ impl DialogImpl for MainMenuDialog {
             <p class="title">"Main Menu"</p>
             <div class="menu-btn-group">
                 <button>"Play Offline"</button>
-                <button value=ret!(Online)>"Play Online"</button>
+                {
+                    #[cfg(feature = "online")]
+                    view! { <button value=ret!(Online)>"Play Online"</button> }
+                }
             </div>
         }
     }
diff --git a/client/src/lib.rs b/client/src/lib.rs
index 2cec66f..189e556 100644
--- a/client/src/lib.rs
+++ b/client/src/lib.rs
@@ -6,7 +6,7 @@ mod game_view;
 use base64::{prelude::BASE64_STANDARD, Engine};
 use c6ol_core::{
     game::{Move, Point, Record, Stone},
-    protocol::{ClientMessage, GameId, Request, ServerMessage},
+    protocol::{ClientMessage, Request, ServerMessage},
 };
 use dialog::*;
 use leptos::{ev, prelude::*};
@@ -348,16 +348,17 @@ pub fn App() -> impl IntoView {
             return;
         }
 
-        if let Some(id) = GameId::try_from(id.as_bytes())
-            .ok()
-            .filter(|id| id.iter().all(u8::is_ascii_alphanumeric))
-        {
-            connect(ClientMessage::Join(id));
-        } else {
-            show_dialog(Dialog::from(ErrorDialog {
-                message: "Invalid game ID.".into(),
-            }));
+        #[cfg(feature = "online")]
+        if let Ok(id) = c6ol_core::protocol::GameId::try_from(id.as_bytes()) {
+            if id.iter().all(u8::is_ascii_alphanumeric) {
+                connect(ClientMessage::Join(id));
+                return;
+            }
         }
+
+        show_dialog(Dialog::from(ErrorDialog {
+            message: "Invalid game ID.".into(),
+        }));
     };
 
     let on_event = move |ev: Event| match ev {