diff --git a/src/lib/components/Button.svelte b/src/lib/components/Button.svelte
index 98c016c..9b9658f 100644
--- a/src/lib/components/Button.svelte
+++ b/src/lib/components/Button.svelte
@@ -12,13 +12,13 @@
 
 	const className = $derived(
 		tw(
-			'text-sf-secondary bg-sb-primary ring-ss-secondary inline-flex cursor-default items-center justify-center rounded-md px-2.5 py-1 shadow-xs ring-1',
+			'text-sf-secondary bg-sb-primary inset-ring-ss-secondary inline-flex cursor-default items-center justify-center rounded-md px-2.5 py-1 shadow-xs inset-ring',
 			'hover:ring-ss-primary font-normal transition-shadow duration-200 active:shadow-inner',
 			variant === 'primary' && [
 				'relative text-slate-50 ring-0 duration-200',
 				'before:absolute before:-inset-px before:rounded-[7px]',
 				'before:from-accent-400 before:to-accent-500 before:bg-linear-to-b before:from-40% before:ring-1 before:ring-black/10 before:ring-inset',
-				'dark:before:from-accent-500 dark:before:to-accent-600 before:transition-shadow active:before:shadow-inner'
+				'dark:before:from-accent-600 dark:before:to-accent-700 before:transition-shadow active:before:shadow-inner'
 			],
 			externalClass
 		)
diff --git a/src/lib/components/Dialog.svelte b/src/lib/components/Dialog.svelte
new file mode 100644
index 0000000..9076862
--- /dev/null
+++ b/src/lib/components/Dialog.svelte
@@ -0,0 +1,43 @@
+<script lang="ts">
+	import { tw } from '$lib/tw';
+	import { Dialog } from 'bits-ui';
+	import { fade, fly } from 'svelte/transition';
+
+	const { Root, Overlay, Portal, Content } = Dialog;
+
+	interface Props {
+		open: boolean;
+		children?: import('svelte').Snippet;
+		class?: string;
+	}
+
+	let { open = $bindable(false), children, class: className }: Props = $props();
+</script>
+
+<Root bind:open>
+	<Portal>
+		<Overlay forceMount>
+			{#snippet child({ props, open })}
+				{#if open}
+					<div {...props} class="fixed inset-0 z-50 bg-black/50" transition:fade></div>
+				{/if}
+			{/snippet}
+		</Overlay>
+		<Content forceMount>
+			{#snippet child({ props, open })}
+				{#if open}
+					<div
+						{...props}
+						class={tw(
+							'bg-sb-secondary border-ss-secondary shadow-3xl fixed inset-1/2 z-50 -translate-1/2 overflow-hidden rounded-lg border sm:min-h-64 sm:min-w-lg',
+							className
+						)}
+						transition:fly={{ y: -25 }}
+					>
+						{@render children?.()}
+					</div>
+				{/if}
+			{/snippet}
+		</Content>
+	</Portal>
+</Root>
diff --git a/src/lib/components/GroupedList/GroupedListContainer.svelte b/src/lib/components/GroupedList/GroupedListContainer.svelte
index 388f084..af5c9e6 100644
--- a/src/lib/components/GroupedList/GroupedListContainer.svelte
+++ b/src/lib/components/GroupedList/GroupedListContainer.svelte
@@ -1,9 +1,15 @@
 <script lang="ts">
-	interface Props {
-		children?: import('svelte').Snippet;
-	}
+	import { tw } from '$lib/tw';
+	import type { HTMLAttributes } from 'svelte/elements';
 
-	let { children }: Props = $props();
+	type Props = {
+		children?: import('svelte').Snippet;
+		class?: string;
+	} & Omit<HTMLAttributes<HTMLDivElement>, 'class'>;
+
+	let { children, class: className, ...rest }: Props = $props();
 </script>
 
-<div class="mx-auto max-w-3xl">{@render children?.()}</div>
+<div class={tw('mx-auto max-w-3xl', className)} {...rest}>
+	{@render children?.()}
+</div>
diff --git a/src/lib/components/GroupedList/GroupedListItem.svelte b/src/lib/components/GroupedList/GroupedListItem.svelte
index 8e873c0..39454d3 100644
--- a/src/lib/components/GroupedList/GroupedListItem.svelte
+++ b/src/lib/components/GroupedList/GroupedListItem.svelte
@@ -11,7 +11,10 @@
 		class?: string;
 	} & (
 		| ({ href: string } & Omit<HTMLAnchorAttributes, 'class' | 'href'>)
-		| ({ onclick: Required<HTMLButtonAttributes['onclick']> } & Omit<HTMLButtonAttributes, 'class'>)
+		| ({ onclick: Exclude<HTMLButtonAttributes['onclick'], null | undefined> } & Omit<
+				HTMLButtonAttributes,
+				'class' | 'onclick'
+		  >)
 		| Omit<HTMLAttributes<HTMLDivElement>, 'onclick'>
 	);
 
diff --git a/src/routes/(app)/settings/account/profile/UsernameItem.svelte b/src/routes/(app)/settings/account/profile/UsernameItem.svelte
index b39eb9a..34afe77 100644
--- a/src/routes/(app)/settings/account/profile/UsernameItem.svelte
+++ b/src/routes/(app)/settings/account/profile/UsernameItem.svelte
@@ -1,10 +1,10 @@
 <script lang="ts">
-	import Button from '$lib/components/Button.svelte';
+	import Dialog from '$lib/components/Dialog.svelte';
 	import { GroupedListItem } from '$lib/components/GroupedList';
-	import LoadingIndicator from '$lib/components/LoadingIndicator.svelte';
-	import { idURLToUsername, validateIDURL } from '$lib/idURL';
+	import { idURLToUsername, validateIDURL, type IDURLValidity } from '$lib/idURL';
 	import type { BlahIdentity } from '@blah-im/core/identity';
-	import { AtSymbol, ExclamationCircle, ExclamationTriangle, Icon } from 'svelte-hero-icons';
+	import { AtSymbol, ExclamationCircle, Icon } from 'svelte-hero-icons';
+	import UsernameSetupSelfhostDialog from './UsernameSetupSelfhostDialog.svelte';
 
 	interface Props {
 		url: string;
@@ -12,27 +12,36 @@
 	}
 	let { url, identity }: Props = $props();
 
+	let validationResult = $state<IDURLValidity | null>(null);
+	let showFixDialog = $state(false);
+
 	async function validate() {
 		if (!identity) return null;
 
-		return await validateIDURL(url, identity);
+		validationResult = await validateIDURL(url, identity);
 	}
+
+	$effect.pre(() => {
+		if (identity && !showFixDialog) {
+			validate();
+		}
+	});
+
+	const isInvalid = $derived(validationResult && !validationResult.valid);
 </script>
 
-<GroupedListItem>
+<GroupedListItem onclick={isInvalid ? () => (showFixDialog = true) : undefined}>
 	<div class="flex items-center gap-0.5">
 		<Icon micro src={AtSymbol} class="size-3.5 opacity-90" />
 		<span>{idURLToUsername(url)}</span>
 	</div>
 
 	{#snippet badge()}
-		{#await validate()}
-			<LoadingIndicator />
-		{:then result}
-			{#if result && !result.valid}
-				<Icon mini src={ExclamationCircle} class="size-5 fill-red-500 dark:fill-red-400" />
-				<Button>Fix</Button>
+		{#if isInvalid}
+			<Icon mini src={ExclamationCircle} class="size-5 fill-red-500 dark:fill-red-400" />
+			{#if url && identity}
+				<UsernameSetupSelfhostDialog bind:open={showFixDialog} {url} {identity} />
 			{/if}
-		{/await}
+		{/if}
 	{/snippet}
 </GroupedListItem>
diff --git a/src/routes/(app)/settings/account/profile/UsernameSetupSelfhostDialog.svelte b/src/routes/(app)/settings/account/profile/UsernameSetupSelfhostDialog.svelte
new file mode 100644
index 0000000..6064b25
--- /dev/null
+++ b/src/routes/(app)/settings/account/profile/UsernameSetupSelfhostDialog.svelte
@@ -0,0 +1,51 @@
+<script lang="ts">
+	import Button from '$lib/components/Button.svelte';
+	import Dialog from '$lib/components/Dialog.svelte';
+	import { GroupedListContainer, GroupedListSection } from '$lib/components/GroupedList';
+	import GroupedListContent from '$lib/components/GroupedList/GroupedListContent.svelte';
+	import PageHeader from '$lib/components/PageHeader.svelte';
+	import { idURLToUsername } from '$lib/idURL';
+	import type { BlahIdentity } from '@blah-im/core/identity';
+
+	interface Props {
+		open: boolean;
+		url: string;
+		identity: BlahIdentity;
+	}
+
+	let { open = $bindable(), url, identity }: Props = $props();
+
+	const username = $derived(idURLToUsername(url));
+	const profileDescriptionString = $derived(
+		JSON.stringify(identity.generateIdentityDescription(), null, 2)
+	);
+</script>
+
+<Dialog bind:open class="flex h-2/3 flex-col">
+	<PageHeader>
+		<h3 class="flex-1">Setup Domain {username}</h3>
+		<Button variant="primary" onclick={() => (open = false)}>Done</Button>
+	</PageHeader>
+
+	<GroupedListContainer class="w-full grow overflow-x-auto">
+		<GroupedListSection>
+			{#snippet header()}
+				<div class="-me-4 flex min-w-0 items-end gap-2 text-base normal-case">
+					<p class="text-sf-primary">
+						For others to validate your domain as your username, put the content below at
+						<code>/.well-known/blah/profile.json</code>
+						under your domain.
+					</p>
+					<Button>Copy</Button>
+				</div>
+			{/snippet}
+			<GroupedListContent class="p-0">
+				<textarea
+					readonly
+					class="text-sf-primary block h-100 w-full resize-none overflow-x-auto px-4 py-3 font-mono"
+					value={profileDescriptionString}
+				></textarea>
+			</GroupedListContent>
+		</GroupedListSection>
+	</GroupedListContainer>
+</Dialog>