diff --git a/web/src/components/NewSession/index.tsx b/web/src/components/NewSession/index.tsx
index 7287e77b..fb81c7f1 100644
--- a/web/src/components/NewSession/index.tsx
+++ b/web/src/components/NewSession/index.tsx
@@ -1431,6 +1431,7 @@ export function NewSession(props: {
                 confirmingLabel={t('codexSync.duplicates.confirm.confirming')}
                 onConfirm={handleMergeDuplicateSessions}
                 isPending={isMergingDuplicateSessions}
+                centerTitle
             />
         </div>
     )
diff --git a/web/src/components/RenameSessionDialog.tsx b/web/src/components/RenameSessionDialog.tsx
index 38178243..a9203178 100644
--- a/web/src/components/RenameSessionDialog.tsx
+++ b/web/src/components/RenameSessionDialog.tsx
@@ -59,8 +59,10 @@ export function RenameSessionDialog(props: RenameSessionDialogProps) {
     return (
         <Dialog open={isOpen} onOpenChange={(open) => !open && onClose()}>
             <DialogContent className="max-w-sm">
-                <DialogHeader>
-                    <DialogTitle>{t('dialog.rename.title')}</DialogTitle>
+                <DialogHeader className="pr-0">
+                    <DialogTitle className="min-h-6 px-10 text-center leading-6">
+                        {t('dialog.rename.title')}
+                    </DialogTitle>
                 </DialogHeader>
                 <form onSubmit={handleSubmit} className="mt-4 flex flex-col gap-4">
                     <input
diff --git a/web/src/components/SessionDialogTitleAlignment.test.tsx b/web/src/components/SessionDialogTitleAlignment.test.tsx
new file mode 100644
index 00000000..edbe97af
--- /dev/null
+++ b/web/src/components/SessionDialogTitleAlignment.test.tsx
@@ -0,0 +1,68 @@
+import { render, screen, within } from '@testing-library/react'
+import { describe, expect, it, vi } from 'vitest'
+import { I18nProvider } from '@/lib/i18n-context'
+import { ToastProvider } from '@/lib/toast-context'
+import { RenameSessionDialog } from './RenameSessionDialog'
+import { SessionExportDialog } from './SessionExportDialog'
+import { UriConfirmDialog } from './UriConfirmDialog'
+
+function renderWithProviders(content: React.ReactNode) {
+    return render(
+        <I18nProvider>
+            <ToastProvider>{content}</ToastProvider>
+        </I18nProvider>
+    )
+}
+
+function expectCenteredTitle(name: string) {
+    const dialog = screen.getByRole('dialog')
+    const title = within(dialog).getByRole('heading', { name })
+
+    expect(title.parentElement).toHaveClass('pr-0')
+    expect(title).toHaveClass('min-h-6', 'px-10', 'text-center', 'leading-6')
+    expect(within(dialog).getByRole('button', { name: 'Close' })).toHaveClass('top-3', 'h-8')
+}
+
+describe('session dialog title alignment', () => {
+    it('centers the rename dialog title on the close button centerline', () => {
+        renderWithProviders(
+            <RenameSessionDialog
+                isOpen={true}
+                onClose={vi.fn()}
+                currentName="Session"
+                onRename={vi.fn(async () => {})}
+                isPending={false}
+            />
+        )
+
+        expectCenteredTitle('Rename Session')
+    })
+
+    it('centers the export dialog title on the close button centerline', () => {
+        renderWithProviders(
+            <SessionExportDialog
+                isOpen={true}
+                onClose={vi.fn()}
+                sessionId="session-1"
+                api={null}
+            />
+        )
+
+        expectCenteredTitle('Export conversation')
+    })
+
+    it('centers the external-link dialog title on the close button centerline', () => {
+        renderWithProviders(
+            <UriConfirmDialog
+                open={true}
+                url="obsidian://open"
+                scheme="obsidian"
+                onCancel={vi.fn()}
+                onOpen={vi.fn()}
+                onAlwaysAllow={vi.fn()}
+            />
+        )
+
+        expectCenteredTitle('Open this link?')
+    })
+})
diff --git a/web/src/components/SessionExportDialog.tsx b/web/src/components/SessionExportDialog.tsx
index b81509ac..ab04a6d0 100644
--- a/web/src/components/SessionExportDialog.tsx
+++ b/web/src/components/SessionExportDialog.tsx
@@ -101,8 +101,10 @@ export function SessionExportDialog(props: SessionExportDialogProps) {
     return (
         <Dialog open={props.isOpen} onOpenChange={(open) => !open && handleClose()}>
             <DialogContent className="max-w-sm">
-                <DialogHeader>
-                    <DialogTitle>{t('session.export.title')}</DialogTitle>
+                <DialogHeader className="pr-0">
+                    <DialogTitle className="min-h-6 px-10 text-center leading-6">
+                        {t('session.export.title')}
+                    </DialogTitle>
                     <DialogDescription className="mt-2">
                         {t('session.export.description')}
                     </DialogDescription>
diff --git a/web/src/components/SessionHeader.tsx b/web/src/components/SessionHeader.tsx
index 7f5adb10..c1276291 100644
--- a/web/src/components/SessionHeader.tsx
+++ b/web/src/components/SessionHeader.tsx
@@ -391,6 +391,7 @@ export function SessionHeader(props: {
                     confirmingLabel={t('dialog.reopen.dismiss')}
                     onConfirm={async () => setReopenError(null)}
                     isPending={false}
+                    centerTitle
                 />
             ) : null}
 
@@ -419,6 +420,7 @@ export function SessionHeader(props: {
                 onConfirm={archiveSession}
                 isPending={isPending}
                 destructive
+                centerTitle
             />
 
             <ConfirmDialog
@@ -440,6 +442,7 @@ export function SessionHeader(props: {
                 onConfirm={handleDelete}
                 isPending={isPending}
                 destructive
+                centerTitle
             />
         </>
     )
diff --git a/web/src/components/SessionList.tsx b/web/src/components/SessionList.tsx
index 28645f7e..7531895b 100644
--- a/web/src/components/SessionList.tsx
+++ b/web/src/components/SessionList.tsx
@@ -886,6 +886,7 @@ function SessionItem(props: {
                     confirmingLabel={t('dialog.reopen.dismiss')}
                     onConfirm={async () => setReopenError(null)}
                     isPending={false}
+                    centerTitle
                 />
             ) : null}
 
@@ -919,6 +920,7 @@ function SessionItem(props: {
                     onConfirm={archiveSession}
                     isPending={isPending}
                     destructive
+                    centerTitle
                 />
             ) : null}
 
@@ -933,6 +935,7 @@ function SessionItem(props: {
                     onConfirm={deleteSession}
                     isPending={isPending}
                     destructive
+                    centerTitle
                 />
             ) : null}
         </>
diff --git a/web/src/components/UriConfirmDialog.tsx b/web/src/components/UriConfirmDialog.tsx
index 1457d16b..ca0430d3 100644
--- a/web/src/components/UriConfirmDialog.tsx
+++ b/web/src/components/UriConfirmDialog.tsx
@@ -38,8 +38,10 @@ export function UriConfirmDialog(props: UriConfirmDialogProps) {
     return (
         <Dialog open={open} onOpenChange={(isOpen) => !isOpen && onCancel()}>
             <DialogContent className="max-w-md">
-                <DialogHeader>
-                    <DialogTitle>{t('dialog.uri.title')}</DialogTitle>
+                <DialogHeader className="pr-0">
+                    <DialogTitle className="min-h-6 px-10 text-center leading-6">
+                        {t('dialog.uri.title')}
+                    </DialogTitle>
                 </DialogHeader>
                 <DialogDescription className="mt-2">
                     {t('dialog.uri.description')}
diff --git a/web/src/components/ui/ConfirmDialog.test.tsx b/web/src/components/ui/ConfirmDialog.test.tsx
new file mode 100644
index 00000000..d80f2283
--- /dev/null
+++ b/web/src/components/ui/ConfirmDialog.test.tsx
@@ -0,0 +1,44 @@
+import { render, screen, within } from '@testing-library/react'
+import { describe, expect, it, vi } from 'vitest'
+import { I18nProvider } from '@/lib/i18n-context'
+import { ConfirmDialog } from './ConfirmDialog'
+
+function renderDialog(centerTitle = false) {
+    render(
+        <I18nProvider>
+            <ConfirmDialog
+                isOpen={true}
+                onClose={vi.fn()}
+                title="Archive Session"
+                description="Archive this session?"
+                confirmLabel="Archive"
+                confirmingLabel="Archiving..."
+                onConfirm={vi.fn(async () => {})}
+                isPending={false}
+                centerTitle={centerTitle}
+            />
+        </I18nProvider>
+    )
+}
+
+describe('ConfirmDialog', () => {
+    it('centers an opted-in title on the close button centerline', () => {
+        renderDialog(true)
+
+        const dialog = screen.getByRole('dialog')
+        const title = within(dialog).getByRole('heading', { name: 'Archive Session' })
+
+        expect(title.parentElement).toHaveClass('pr-0')
+        expect(title).toHaveClass('min-h-6', 'px-10', 'text-center', 'leading-6')
+        expect(within(dialog).getByRole('button', { name: 'Close' })).toHaveClass('top-3', 'h-8')
+    })
+
+    it('keeps the default dialog title layout when centering is not requested', () => {
+        renderDialog()
+
+        const title = screen.getByRole('heading', { name: 'Archive Session' })
+
+        expect(title.parentElement).toHaveClass('pr-12')
+        expect(title).not.toHaveClass('min-h-6', 'px-10', 'leading-6')
+    })
+})
diff --git a/web/src/components/ui/ConfirmDialog.tsx b/web/src/components/ui/ConfirmDialog.tsx
index e998d1a3..8d2e0674 100644
--- a/web/src/components/ui/ConfirmDialog.tsx
+++ b/web/src/components/ui/ConfirmDialog.tsx
@@ -19,6 +19,7 @@ type ConfirmDialogProps = {
     onConfirm: () => Promise<void>
     isPending: boolean
     destructive?: boolean
+    centerTitle?: boolean
 }
 
 export function ConfirmDialog(props: ConfirmDialogProps) {
@@ -32,7 +33,8 @@ export function ConfirmDialog(props: ConfirmDialogProps) {
         confirmingLabel,
         onConfirm,
         isPending,
-        destructive = false
+        destructive = false,
+        centerTitle = false
     } = props
 
     const [error, setError] = useState<string | null>(null)
@@ -61,8 +63,14 @@ export function ConfirmDialog(props: ConfirmDialogProps) {
     return (
         <Dialog open={isOpen} onOpenChange={(open) => !open && onClose()}>
             <DialogContent className="max-w-sm">
-                <DialogHeader>
-                    <DialogTitle>{title}</DialogTitle>
+                <DialogHeader className={centerTitle ? 'pr-0' : undefined}>
+                    <DialogTitle
+                        className={centerTitle
+                            ? 'min-h-6 px-10 text-center leading-6'
+                            : undefined}
+                    >
+                        {title}
+                    </DialogTitle>
                     <DialogDescription className="mt-2 whitespace-pre-line">
                         {description}
                     </DialogDescription>