diff --git a/client/src/lib/push-utils.ts b/client/src/lib/push-utils.ts
new file mode 100644
index 0000000..04bf346
--- /dev/null
+++ b/client/src/lib/push-utils.ts
@@ -0,0 +1,63 @@
+function urlBase64ToUint8Array(base64String: string) {
+  const padding = "=".repeat((4 - (base64String.length % 4)) % 4);
+  const base64 = (base64String + padding).replace(/-/g, "+").replace(/_/g, "/");
+  const rawData = window.atob(base64);
+  const outputArray = new Uint8Array(rawData.length);
+  for (let i = 0; i < rawData.length; ++i) {
+    outputArray[i] = rawData.charCodeAt(i);
+  }
+  return outputArray;
+}
+
+export function isPushSupported(): boolean {
+  return "serviceWorker" in navigator && "PushManager" in window;
+}
+
+export async function getExistingSubscription(): Promise<PushSubscription | null> {
+  if (!isPushSupported()) return null;
+  try {
+    const reg = await navigator.serviceWorker.getRegistration("/sw.js");
+    if (reg) return await reg.pushManager.getSubscription();
+  } catch {}
+  return null;
+}
+
+export async function subscribeToPush(): Promise<boolean> {
+  const keyRes = await fetch("/api/push/vapid-key");
+  const { publicKey } = await keyRes.json();
+  if (!publicKey) throw new Error("VAPID key not configured");
+
+  const reg = await navigator.serviceWorker.register("/sw.js");
+  await navigator.serviceWorker.ready;
+
+  const sub = await reg.pushManager.subscribe({
+    userVisibleOnly: true,
+    applicationServerKey: urlBase64ToUint8Array(publicKey),
+  });
+
+  const subJson = sub.toJSON();
+  const res = await fetch("/api/push/subscribe", {
+    method: "POST",
+    headers: { "Content-Type": "application/json" },
+    body: JSON.stringify({ endpoint: subJson.endpoint, keys: subJson.keys }),
+  });
+  if (!res.ok) throw new Error("Subscription save failed");
+  return true;
+}
+
+export async function unsubscribeFromPush(): Promise<boolean> {
+  const reg = await navigator.serviceWorker.getRegistration("/sw.js");
+  if (reg) {
+    const sub = await reg.pushManager.getSubscription();
+    if (sub) {
+      const res = await fetch("/api/push/unsubscribe", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ endpoint: sub.endpoint }),
+      });
+      if (!res.ok) throw new Error("Unsubscribe failed");
+      await sub.unsubscribe();
+    }
+  }
+  return true;
+}