# SEO Utilities
Additional utilities from nuxt-seo-utils and nuxt-link-checker.
## Canonical URLs
Automatic canonical URLs based on site config.
```ts
export default defineNuxtConfig({
seoUtils: {
canonicalQueryWhitelist: ['page', 'sort'], // Keep these query params
redirectToCanonicalSiteUrl: true // 301 to canonical domain
}
})
```
Override per-page:
```ts
useHead({
link: [{ rel: 'canonical', href: 'https://example.com/preferred-url' }]
})
```
## Breadcrumbs
Generate breadcrumb items from current route:
```ts
const items = useBreadcrumbItems()
// [{ label: 'Home', to: '/' }, { label: 'Blog', to: '/blog' }, { label: 'My Post' }]
```
For schema.org integration, see [schema-org.md](schema-org.md#breadcrumbs).
Render in template:
```vue
```
Customize labels in route meta:
```ts
// pages/blog/[slug].vue
definePageMeta({
breadcrumb: { label: 'Article' }
})
```
## Title Templates
Set site-wide title template:
```ts
// nuxt.config.ts
export default defineNuxtConfig({
app: {
head: {
titleTemplate: '%s | My Site'
}
}
})
```
Override per-page:
```ts
useHead({
title: 'Page Title',
titleTemplate: '%s - Different Template'
})
```
## Meta Defaults
```ts
// nuxt.config.ts
export default defineNuxtConfig({
app: {
head: {
meta: [
{ name: 'author', content: 'My Name' },
{ property: 'og:site_name', content: 'My Site' }
]
}
}
})
```
## Link Checker
Build-time validation of links.
```ts
export default defineNuxtConfig({
linkChecker: {
failOnError: true, // Default: fail build on errors
exclude: ['/api/**'],
skipInspections: ['missing-hash'],
report: { html: true } // Generate HTML report
}
})
```
**Inspections:**
- `no-error-response` - 404/500 errors
- `no-baseless` - Missing base URL
- `no-javascript` - javascript: links
- `trailing-slash` - Inconsistent slashes
- `missing-hash` - Invalid anchor targets
- `no-uppercase-chars` - URL casing
- `absolute-site-urls` - Hardcoded domain
### Ignoring Links
```html
Link
```
## File-Based Icons
Place favicon files in `public/`:
```
public/
├── favicon.ico
├── favicon.svg # Modern browsers
├── apple-touch-icon.png
└── site.webmanifest
```
Auto-detected and added to ``.
For SVG favicon with dark mode support:
```svg
```
## Social Meta Tags
Automatic Open Graph and Twitter cards from site config (see [site-config.md](site-config.md)).
Override per-page:
```ts
useSeoMeta({
title: 'Page Title',
description: 'Page description',
ogImage: '/images/page-og.png',
twitterCard: 'summary_large_image'
})
```
## Trailing Slash Redirect
Enforce consistent URLs:
```ts
export default defineNuxtConfig({
site: {
trailingSlash: false // Redirect /blog/ to /blog
}
})
```
## Debug Panel
Enable comprehensive debug panel:
```ts
export default defineNuxtConfig({
seo: { debug: true }
})
```
Shows in dev:
- Current meta tags
- Schema.org data
- OG image preview
- Sitemap/robots status