diff --git a/desktop/src/features/communities/ui/WelcomeSetup.tsx b/desktop/src/features/communities/ui/WelcomeSetup.tsx
index 964e105f8f..bde1458222 100644
--- a/desktop/src/features/communities/ui/WelcomeSetup.tsx
+++ b/desktop/src/features/communities/ui/WelcomeSetup.tsx
@@ -1,4 +1,5 @@
 import * as React from "react";
+import { Check, Copy } from "lucide-react";
 
 import { HostedCommunityOnboarding } from "@/features/communities/ui/HostedCommunityOnboarding";
 import { useCommunityOnboarding } from "@/features/onboarding/communityOnboarding";
@@ -12,6 +13,9 @@ import {
   type OnboardingTransitionDirection,
   OnboardingSlideTransition,
 } from "@/features/onboarding/ui/OnboardingSlideTransition";
+import { useIdentityQuery } from "@/shared/api/hooks";
+import { writeTextToClipboard } from "@/shared/lib/clipboard";
+import { pubkeyToNpub } from "@/shared/lib/nostrUtils";
 import { useSystemColorScheme } from "@/shared/theme/useSystemColorScheme";
 import { Button } from "@/shared/ui/button";
 import { Card } from "@/shared/ui/card";
@@ -41,8 +45,18 @@ export function WelcomeSetup({
   // we only navigate to the hosted stage once sign-in completes, so the page
   // behind the modal never changes out from under the user.
   const [isHostedSignInOpen, setIsHostedSignInOpen] = React.useState(false);
+  const [copiedNpub, setCopiedNpub] = React.useState(false);
   const communityOnboarding = useCommunityOnboarding();
+  const identityQuery = useIdentityQuery();
   const systemColorScheme = useSystemColorScheme();
+  const npub = identityQuery.data?.pubkey
+    ? pubkeyToNpub(identityQuery.data.pubkey)
+    : "";
+  const npubError = identityQuery.error
+    ? identityQuery.error instanceof Error
+      ? identityQuery.error.message
+      : "Could not load your public key."
+    : null;
 
   const showPage = React.useCallback(
     (nextPage: WelcomeSetupPage, direction?: OnboardingTransitionDirection) => {
@@ -243,7 +257,7 @@ export function WelcomeSetup({
                     : "Enter the invite link or community URL you received."}
                 </p>
               </div>
-              <div className="flex w-full flex-1 items-center justify-center">
+              <div className="flex w-full flex-1 flex-col items-center justify-center gap-16">
                 <InviteRedeemForm
                   error={null}
                   isRedeeming={false}
@@ -255,6 +269,52 @@ export function WelcomeSetup({
                   placeholder="Invite link or community URL"
                   variant="onboarding-spotlight"
                 />
+                {page === "join" ? (
+                  <div className="w-full max-w-[560px] text-left">
+                    <p className="text-sm font-medium text-foreground">
+                      Joining a private community?
+                    </p>
+                    <p className="mt-2 text-sm leading-6 text-foreground/75">
+                      Some communities need the owner to add you before you can
+                      join. Copy your public ID and send it to the community
+                      owner.
+                    </p>
+                    <div className="mt-4 flex items-center gap-3 rounded-xl border border-foreground/10 bg-background/35 px-4 py-3">
+                      <code
+                        className="min-w-0 flex-1 truncate font-mono text-xs text-foreground/80"
+                        data-testid="welcome-join-npub"
+                      >
+                        {npub || "Loading…"}
+                      </code>
+                      <Button
+                        aria-label="Copy public ID"
+                        className="h-9 shrink-0 rounded-full px-3"
+                        disabled={!npub}
+                        onClick={() => {
+                          void writeTextToClipboard(npub).then(() => {
+                            setCopiedNpub(true);
+                            window.setTimeout(() => setCopiedNpub(false), 1500);
+                          });
+                        }}
+                        size="sm"
+                        type="button"
+                        variant="outline"
+                      >
+                        {copiedNpub ? (
+                          <Check className="h-4 w-4" aria-hidden="true" />
+                        ) : (
+                          <Copy className="h-4 w-4" aria-hidden="true" />
+                        )}
+                        <span>{copiedNpub ? "Copied" : "Copy"}</span>
+                      </Button>
+                    </div>
+                    {npubError ? (
+                      <p className="mt-3 text-sm text-destructive">
+                        {npubError}
+                      </p>
+                    ) : null}
+                  </div>
+                ) : null}
               </div>
             </OnboardingSlideTransition>
           )}
diff --git a/desktop/tests/e2e/onboarding.spec.ts b/desktop/tests/e2e/onboarding.spec.ts
index 86e22189e4..bb916d8011 100644
--- a/desktop/tests/e2e/onboarding.spec.ts
+++ b/desktop/tests/e2e/onboarding.spec.ts
@@ -621,6 +621,11 @@ test("first-community choices route join, create, owner, and member intents", as
   await expect(
     page.getByRole("heading", { name: "Join a community" }),
   ).toBeVisible();
+  await expect(page.getByText("Joining a private community?")).toBeVisible();
+  await expect(page.getByTestId("welcome-join-npub")).toBeVisible();
+  await expect(
+    page.getByRole("button", { name: "Copy public ID" }),
+  ).toBeVisible();
   await accessInput.fill("https://default.example.com/invite/abc123");
   await expect(page.getByTestId("invite-redeem-submit")).toBeEnabled();
 });